align two piecewise functions











up vote
5
down vote

favorite












I have problem with my piecewise functions



I read others post and I tried this but I have errors



documentclass{article}
usepackage{amsmath}
begin{document}
begin{align*}
$x_{{i}{j}}$ =
&begin{cases}
text{1,} &quadtext{Si se envía agua desde área i ( i $in$ {1,2,3,4,5,6,7,8,9,10}) a sitio j ( j $in$ {1,2,3,4,5,6,7})} \
text{0,} &quadtext{En caso contrario}
end{cases}\
$y_{j}$ =
&begin{cases}
text{1,} &quadtext{ Si se construye planta en el sitio j ( j $in $ {1,2,3,4,5,6,7})} \
text{0,} &quadtext{En caso contrario}
end{cases}
end{align*}
end{document}



Runaway argument? ! Paragraph ended before align* was complete.
par l.592




I did this (using [) and it works well but they appear not aligned



documentclass{article}
usepackage{amsmath}
begin{document}
[
x_{{i}{j}} =
begin{cases}
text{1,} &quadtext{Si se envía agua desde área i ( i $in$ {1,2,3,4,5,6,7,8,9,10}) a sitio j ( j $in$ {1,2,3,4,5,6,7})} \
text{0,} &quadtext{En caso contrario}
end{cases}
]
[
y_{j} =
begin{cases}
text{1,} &quadtext{ Si se construye planta en el sitio j ( j $in $ {1,2,3,4,5,6,7})} \
text{0,} &quadtext{En caso contrario}
end{cases}
]


end{document}


enter image description here



and I want they are aligned, like this



enter image description here










share|improve this question







New contributor




EmiliOrtega is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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  • remove the $$ around x_{ij} and y_{j}. begin{align*} is already a math environment.
    – Troy
    Nov 30 at 17:00












  • lol I did that and it didn't work before but now it works hahaha thanks man!! is there a way to align the functions using [ .... ] ?
    – EmiliOrtega
    Nov 30 at 17:02










  • Yes, with the begin{aligned} environment from amsmath. E.g. of its use: Alignment in equations
    – Troy
    Nov 30 at 17:04

















up vote
5
down vote

favorite












I have problem with my piecewise functions



I read others post and I tried this but I have errors



documentclass{article}
usepackage{amsmath}
begin{document}
begin{align*}
$x_{{i}{j}}$ =
&begin{cases}
text{1,} &quadtext{Si se envía agua desde área i ( i $in$ {1,2,3,4,5,6,7,8,9,10}) a sitio j ( j $in$ {1,2,3,4,5,6,7})} \
text{0,} &quadtext{En caso contrario}
end{cases}\
$y_{j}$ =
&begin{cases}
text{1,} &quadtext{ Si se construye planta en el sitio j ( j $in $ {1,2,3,4,5,6,7})} \
text{0,} &quadtext{En caso contrario}
end{cases}
end{align*}
end{document}



Runaway argument? ! Paragraph ended before align* was complete.
par l.592




I did this (using [) and it works well but they appear not aligned



documentclass{article}
usepackage{amsmath}
begin{document}
[
x_{{i}{j}} =
begin{cases}
text{1,} &quadtext{Si se envía agua desde área i ( i $in$ {1,2,3,4,5,6,7,8,9,10}) a sitio j ( j $in$ {1,2,3,4,5,6,7})} \
text{0,} &quadtext{En caso contrario}
end{cases}
]
[
y_{j} =
begin{cases}
text{1,} &quadtext{ Si se construye planta en el sitio j ( j $in $ {1,2,3,4,5,6,7})} \
text{0,} &quadtext{En caso contrario}
end{cases}
]


end{document}


enter image description here



and I want they are aligned, like this



enter image description here










share|improve this question







New contributor




EmiliOrtega is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.




















  • remove the $$ around x_{ij} and y_{j}. begin{align*} is already a math environment.
    – Troy
    Nov 30 at 17:00












  • lol I did that and it didn't work before but now it works hahaha thanks man!! is there a way to align the functions using [ .... ] ?
    – EmiliOrtega
    Nov 30 at 17:02










  • Yes, with the begin{aligned} environment from amsmath. E.g. of its use: Alignment in equations
    – Troy
    Nov 30 at 17:04















up vote
5
down vote

favorite









up vote
5
down vote

favorite











I have problem with my piecewise functions



I read others post and I tried this but I have errors



documentclass{article}
usepackage{amsmath}
begin{document}
begin{align*}
$x_{{i}{j}}$ =
&begin{cases}
text{1,} &quadtext{Si se envía agua desde área i ( i $in$ {1,2,3,4,5,6,7,8,9,10}) a sitio j ( j $in$ {1,2,3,4,5,6,7})} \
text{0,} &quadtext{En caso contrario}
end{cases}\
$y_{j}$ =
&begin{cases}
text{1,} &quadtext{ Si se construye planta en el sitio j ( j $in $ {1,2,3,4,5,6,7})} \
text{0,} &quadtext{En caso contrario}
end{cases}
end{align*}
end{document}



Runaway argument? ! Paragraph ended before align* was complete.
par l.592




I did this (using [) and it works well but they appear not aligned



documentclass{article}
usepackage{amsmath}
begin{document}
[
x_{{i}{j}} =
begin{cases}
text{1,} &quadtext{Si se envía agua desde área i ( i $in$ {1,2,3,4,5,6,7,8,9,10}) a sitio j ( j $in$ {1,2,3,4,5,6,7})} \
text{0,} &quadtext{En caso contrario}
end{cases}
]
[
y_{j} =
begin{cases}
text{1,} &quadtext{ Si se construye planta en el sitio j ( j $in $ {1,2,3,4,5,6,7})} \
text{0,} &quadtext{En caso contrario}
end{cases}
]


end{document}


enter image description here



and I want they are aligned, like this



enter image description here










share|improve this question







New contributor




EmiliOrtega is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











I have problem with my piecewise functions



I read others post and I tried this but I have errors



documentclass{article}
usepackage{amsmath}
begin{document}
begin{align*}
$x_{{i}{j}}$ =
&begin{cases}
text{1,} &quadtext{Si se envía agua desde área i ( i $in$ {1,2,3,4,5,6,7,8,9,10}) a sitio j ( j $in$ {1,2,3,4,5,6,7})} \
text{0,} &quadtext{En caso contrario}
end{cases}\
$y_{j}$ =
&begin{cases}
text{1,} &quadtext{ Si se construye planta en el sitio j ( j $in $ {1,2,3,4,5,6,7})} \
text{0,} &quadtext{En caso contrario}
end{cases}
end{align*}
end{document}



Runaway argument? ! Paragraph ended before align* was complete.
par l.592




I did this (using [) and it works well but they appear not aligned



documentclass{article}
usepackage{amsmath}
begin{document}
[
x_{{i}{j}} =
begin{cases}
text{1,} &quadtext{Si se envía agua desde área i ( i $in$ {1,2,3,4,5,6,7,8,9,10}) a sitio j ( j $in$ {1,2,3,4,5,6,7})} \
text{0,} &quadtext{En caso contrario}
end{cases}
]
[
y_{j} =
begin{cases}
text{1,} &quadtext{ Si se construye planta en el sitio j ( j $in $ {1,2,3,4,5,6,7})} \
text{0,} &quadtext{En caso contrario}
end{cases}
]


end{document}


enter image description here



and I want they are aligned, like this



enter image description here







horizontal-alignment equations






share|improve this question







New contributor




EmiliOrtega is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question







New contributor




EmiliOrtega is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this question




share|improve this question






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EmiliOrtega is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









asked Nov 30 at 16:38









EmiliOrtega

333




333




New contributor




EmiliOrtega is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





New contributor





EmiliOrtega is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






EmiliOrtega is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.












  • remove the $$ around x_{ij} and y_{j}. begin{align*} is already a math environment.
    – Troy
    Nov 30 at 17:00












  • lol I did that and it didn't work before but now it works hahaha thanks man!! is there a way to align the functions using [ .... ] ?
    – EmiliOrtega
    Nov 30 at 17:02










  • Yes, with the begin{aligned} environment from amsmath. E.g. of its use: Alignment in equations
    – Troy
    Nov 30 at 17:04




















  • remove the $$ around x_{ij} and y_{j}. begin{align*} is already a math environment.
    – Troy
    Nov 30 at 17:00












  • lol I did that and it didn't work before but now it works hahaha thanks man!! is there a way to align the functions using [ .... ] ?
    – EmiliOrtega
    Nov 30 at 17:02










  • Yes, with the begin{aligned} environment from amsmath. E.g. of its use: Alignment in equations
    – Troy
    Nov 30 at 17:04


















remove the $$ around x_{ij} and y_{j}. begin{align*} is already a math environment.
– Troy
Nov 30 at 17:00






remove the $$ around x_{ij} and y_{j}. begin{align*} is already a math environment.
– Troy
Nov 30 at 17:00














lol I did that and it didn't work before but now it works hahaha thanks man!! is there a way to align the functions using [ .... ] ?
– EmiliOrtega
Nov 30 at 17:02




lol I did that and it didn't work before but now it works hahaha thanks man!! is there a way to align the functions using [ .... ] ?
– EmiliOrtega
Nov 30 at 17:02












Yes, with the begin{aligned} environment from amsmath. E.g. of its use: Alignment in equations
– Troy
Nov 30 at 17:04






Yes, with the begin{aligned} environment from amsmath. E.g. of its use: Alignment in equations
– Troy
Nov 30 at 17:04












3 Answers
3






active

oldest

votes

















up vote
3
down vote



accepted










Beware! align already typesets its contents in math mode (but text reverts to text mode).



You have to just align the equals signs with &=; for the long line, I suggest a tabular. Some vertical spacing will help, too.



documentclass{article}
usepackage{amsmath}
begin{document}

begin{align*}
x_{ij} &=
begin{cases}
1, &begin{tabular}[t]{@{}l@{}}
Si se envía agua desde área $i$ ($iin{1,2,3,4,5,6,7,8,9,10}$) \
a sitio $j$ ($jin{1,2,3,4,5,6,7}$)
end{tabular} \[4ex]
0, &text{En caso contrario}
end{cases}\
y_{j} &=
begin{cases}
1, &text{Si se construye planta en el sitio $j$ ($jin{1,2,3,4,5,6,7}$)} \[1ex]
0, &text{En caso contrario}
end{cases}
end{align*}

end{document}


enter image description here






share|improve this answer




























    up vote
    2
    down vote













    Here it is I simplified the text part typing using the cases* environment from mathtols (needless to load àmsmath`). I had to dplit the first case to make it fit the margins:



    documentclass{article}
    usepackage[utf8]{inputenc}
    usepackage[showframe]{geometry}
    usepackage{mathtools}

    begin{document}

    begin{align*}
    x_{{i}{j}} & =
    begin{cases*}
    text{1,} &quad Si se envía agua desde área $ i: ( i in {1,2,3,4,5,6,7,8,9,10})$ \
    & quad a sitio $ j: ( j in {1,2,3,4,5,6,7})$ \
    text{0,} &quad{En caso contrario}
    end{cases*}\[1.5ex]
    y_{j} & =
    begin{cases*}
    1, &quad Si se construye planta en el sitio $ j: ( j in {1,2,3,4,5,6,7})$ \
    0, &quad En caso contrario
    end{cases*}
    end{align*}

    end{document}


    enter image description here






    share|improve this answer




























      up vote
      1
      down vote













      If we go back to your original attempt, a few quick changes gives the result you wanted. This: removes the $$ around x_{ij} and y_j and moves the & you use for alignment to align the equals signs. Edit: I also compressed the set notation to shorten the long line and returned i and j to math mode, as you currently have them as subscripts in math mode. If you'd prefer them to be set upright you should change the subscripts as well.



      documentclass{article}
      usepackage{amsmath}
      begin{document}
      begin{align*}
      x_{ij} &=
      begin{cases}
      text{1,} &quadtext{Si se envía agua desde área $i$ ($i in {1,2,dots,10}$) a sitio $j$ ($j in {1,2,dots,7}$)} \
      text{0,} &quadtext{En caso contrario}
      end{cases}\
      y_{j} &=
      begin{cases}
      text{1,} &quadtext{ Si se construye planta en el sitio $j$ ($j in {1,2,dots,7}$)} \
      text{0,} &quadtext{En caso contrario}
      end{cases}
      end{align*}
      end{document}


      Output:
      New aligned output






      share|improve this answer























      • Since i and j are used in math mode on the LHS, it seems appropriate to use $i$ ($i in {1,dots,10}$) and $j$ ($j in {1,dots,7}$) on the RHS.
        – Werner
        Nov 30 at 17:17










      • Good point, as is the compression of the set notation. Edits made.
        – aoi
        Nov 30 at 17:30











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      3 Answers
      3






      active

      oldest

      votes








      3 Answers
      3






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

      votes








      up vote
      3
      down vote



      accepted










      Beware! align already typesets its contents in math mode (but text reverts to text mode).



      You have to just align the equals signs with &=; for the long line, I suggest a tabular. Some vertical spacing will help, too.



      documentclass{article}
      usepackage{amsmath}
      begin{document}

      begin{align*}
      x_{ij} &=
      begin{cases}
      1, &begin{tabular}[t]{@{}l@{}}
      Si se envía agua desde área $i$ ($iin{1,2,3,4,5,6,7,8,9,10}$) \
      a sitio $j$ ($jin{1,2,3,4,5,6,7}$)
      end{tabular} \[4ex]
      0, &text{En caso contrario}
      end{cases}\
      y_{j} &=
      begin{cases}
      1, &text{Si se construye planta en el sitio $j$ ($jin{1,2,3,4,5,6,7}$)} \[1ex]
      0, &text{En caso contrario}
      end{cases}
      end{align*}

      end{document}


      enter image description here






      share|improve this answer

























        up vote
        3
        down vote



        accepted










        Beware! align already typesets its contents in math mode (but text reverts to text mode).



        You have to just align the equals signs with &=; for the long line, I suggest a tabular. Some vertical spacing will help, too.



        documentclass{article}
        usepackage{amsmath}
        begin{document}

        begin{align*}
        x_{ij} &=
        begin{cases}
        1, &begin{tabular}[t]{@{}l@{}}
        Si se envía agua desde área $i$ ($iin{1,2,3,4,5,6,7,8,9,10}$) \
        a sitio $j$ ($jin{1,2,3,4,5,6,7}$)
        end{tabular} \[4ex]
        0, &text{En caso contrario}
        end{cases}\
        y_{j} &=
        begin{cases}
        1, &text{Si se construye planta en el sitio $j$ ($jin{1,2,3,4,5,6,7}$)} \[1ex]
        0, &text{En caso contrario}
        end{cases}
        end{align*}

        end{document}


        enter image description here






        share|improve this answer























          up vote
          3
          down vote



          accepted







          up vote
          3
          down vote



          accepted






          Beware! align already typesets its contents in math mode (but text reverts to text mode).



          You have to just align the equals signs with &=; for the long line, I suggest a tabular. Some vertical spacing will help, too.



          documentclass{article}
          usepackage{amsmath}
          begin{document}

          begin{align*}
          x_{ij} &=
          begin{cases}
          1, &begin{tabular}[t]{@{}l@{}}
          Si se envía agua desde área $i$ ($iin{1,2,3,4,5,6,7,8,9,10}$) \
          a sitio $j$ ($jin{1,2,3,4,5,6,7}$)
          end{tabular} \[4ex]
          0, &text{En caso contrario}
          end{cases}\
          y_{j} &=
          begin{cases}
          1, &text{Si se construye planta en el sitio $j$ ($jin{1,2,3,4,5,6,7}$)} \[1ex]
          0, &text{En caso contrario}
          end{cases}
          end{align*}

          end{document}


          enter image description here






          share|improve this answer












          Beware! align already typesets its contents in math mode (but text reverts to text mode).



          You have to just align the equals signs with &=; for the long line, I suggest a tabular. Some vertical spacing will help, too.



          documentclass{article}
          usepackage{amsmath}
          begin{document}

          begin{align*}
          x_{ij} &=
          begin{cases}
          1, &begin{tabular}[t]{@{}l@{}}
          Si se envía agua desde área $i$ ($iin{1,2,3,4,5,6,7,8,9,10}$) \
          a sitio $j$ ($jin{1,2,3,4,5,6,7}$)
          end{tabular} \[4ex]
          0, &text{En caso contrario}
          end{cases}\
          y_{j} &=
          begin{cases}
          1, &text{Si se construye planta en el sitio $j$ ($jin{1,2,3,4,5,6,7}$)} \[1ex]
          0, &text{En caso contrario}
          end{cases}
          end{align*}

          end{document}


          enter image description here







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 30 at 17:22









          egreg

          702k8618713145




          702k8618713145






















              up vote
              2
              down vote













              Here it is I simplified the text part typing using the cases* environment from mathtols (needless to load àmsmath`). I had to dplit the first case to make it fit the margins:



              documentclass{article}
              usepackage[utf8]{inputenc}
              usepackage[showframe]{geometry}
              usepackage{mathtools}

              begin{document}

              begin{align*}
              x_{{i}{j}} & =
              begin{cases*}
              text{1,} &quad Si se envía agua desde área $ i: ( i in {1,2,3,4,5,6,7,8,9,10})$ \
              & quad a sitio $ j: ( j in {1,2,3,4,5,6,7})$ \
              text{0,} &quad{En caso contrario}
              end{cases*}\[1.5ex]
              y_{j} & =
              begin{cases*}
              1, &quad Si se construye planta en el sitio $ j: ( j in {1,2,3,4,5,6,7})$ \
              0, &quad En caso contrario
              end{cases*}
              end{align*}

              end{document}


              enter image description here






              share|improve this answer

























                up vote
                2
                down vote













                Here it is I simplified the text part typing using the cases* environment from mathtols (needless to load àmsmath`). I had to dplit the first case to make it fit the margins:



                documentclass{article}
                usepackage[utf8]{inputenc}
                usepackage[showframe]{geometry}
                usepackage{mathtools}

                begin{document}

                begin{align*}
                x_{{i}{j}} & =
                begin{cases*}
                text{1,} &quad Si se envía agua desde área $ i: ( i in {1,2,3,4,5,6,7,8,9,10})$ \
                & quad a sitio $ j: ( j in {1,2,3,4,5,6,7})$ \
                text{0,} &quad{En caso contrario}
                end{cases*}\[1.5ex]
                y_{j} & =
                begin{cases*}
                1, &quad Si se construye planta en el sitio $ j: ( j in {1,2,3,4,5,6,7})$ \
                0, &quad En caso contrario
                end{cases*}
                end{align*}

                end{document}


                enter image description here






                share|improve this answer























                  up vote
                  2
                  down vote










                  up vote
                  2
                  down vote









                  Here it is I simplified the text part typing using the cases* environment from mathtols (needless to load àmsmath`). I had to dplit the first case to make it fit the margins:



                  documentclass{article}
                  usepackage[utf8]{inputenc}
                  usepackage[showframe]{geometry}
                  usepackage{mathtools}

                  begin{document}

                  begin{align*}
                  x_{{i}{j}} & =
                  begin{cases*}
                  text{1,} &quad Si se envía agua desde área $ i: ( i in {1,2,3,4,5,6,7,8,9,10})$ \
                  & quad a sitio $ j: ( j in {1,2,3,4,5,6,7})$ \
                  text{0,} &quad{En caso contrario}
                  end{cases*}\[1.5ex]
                  y_{j} & =
                  begin{cases*}
                  1, &quad Si se construye planta en el sitio $ j: ( j in {1,2,3,4,5,6,7})$ \
                  0, &quad En caso contrario
                  end{cases*}
                  end{align*}

                  end{document}


                  enter image description here






                  share|improve this answer












                  Here it is I simplified the text part typing using the cases* environment from mathtols (needless to load àmsmath`). I had to dplit the first case to make it fit the margins:



                  documentclass{article}
                  usepackage[utf8]{inputenc}
                  usepackage[showframe]{geometry}
                  usepackage{mathtools}

                  begin{document}

                  begin{align*}
                  x_{{i}{j}} & =
                  begin{cases*}
                  text{1,} &quad Si se envía agua desde área $ i: ( i in {1,2,3,4,5,6,7,8,9,10})$ \
                  & quad a sitio $ j: ( j in {1,2,3,4,5,6,7})$ \
                  text{0,} &quad{En caso contrario}
                  end{cases*}\[1.5ex]
                  y_{j} & =
                  begin{cases*}
                  1, &quad Si se construye planta en el sitio $ j: ( j in {1,2,3,4,5,6,7})$ \
                  0, &quad En caso contrario
                  end{cases*}
                  end{align*}

                  end{document}


                  enter image description here







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered Nov 30 at 17:21









                  Bernard

                  163k768192




                  163k768192






















                      up vote
                      1
                      down vote













                      If we go back to your original attempt, a few quick changes gives the result you wanted. This: removes the $$ around x_{ij} and y_j and moves the & you use for alignment to align the equals signs. Edit: I also compressed the set notation to shorten the long line and returned i and j to math mode, as you currently have them as subscripts in math mode. If you'd prefer them to be set upright you should change the subscripts as well.



                      documentclass{article}
                      usepackage{amsmath}
                      begin{document}
                      begin{align*}
                      x_{ij} &=
                      begin{cases}
                      text{1,} &quadtext{Si se envía agua desde área $i$ ($i in {1,2,dots,10}$) a sitio $j$ ($j in {1,2,dots,7}$)} \
                      text{0,} &quadtext{En caso contrario}
                      end{cases}\
                      y_{j} &=
                      begin{cases}
                      text{1,} &quadtext{ Si se construye planta en el sitio $j$ ($j in {1,2,dots,7}$)} \
                      text{0,} &quadtext{En caso contrario}
                      end{cases}
                      end{align*}
                      end{document}


                      Output:
                      New aligned output






                      share|improve this answer























                      • Since i and j are used in math mode on the LHS, it seems appropriate to use $i$ ($i in {1,dots,10}$) and $j$ ($j in {1,dots,7}$) on the RHS.
                        – Werner
                        Nov 30 at 17:17










                      • Good point, as is the compression of the set notation. Edits made.
                        – aoi
                        Nov 30 at 17:30















                      up vote
                      1
                      down vote













                      If we go back to your original attempt, a few quick changes gives the result you wanted. This: removes the $$ around x_{ij} and y_j and moves the & you use for alignment to align the equals signs. Edit: I also compressed the set notation to shorten the long line and returned i and j to math mode, as you currently have them as subscripts in math mode. If you'd prefer them to be set upright you should change the subscripts as well.



                      documentclass{article}
                      usepackage{amsmath}
                      begin{document}
                      begin{align*}
                      x_{ij} &=
                      begin{cases}
                      text{1,} &quadtext{Si se envía agua desde área $i$ ($i in {1,2,dots,10}$) a sitio $j$ ($j in {1,2,dots,7}$)} \
                      text{0,} &quadtext{En caso contrario}
                      end{cases}\
                      y_{j} &=
                      begin{cases}
                      text{1,} &quadtext{ Si se construye planta en el sitio $j$ ($j in {1,2,dots,7}$)} \
                      text{0,} &quadtext{En caso contrario}
                      end{cases}
                      end{align*}
                      end{document}


                      Output:
                      New aligned output






                      share|improve this answer























                      • Since i and j are used in math mode on the LHS, it seems appropriate to use $i$ ($i in {1,dots,10}$) and $j$ ($j in {1,dots,7}$) on the RHS.
                        – Werner
                        Nov 30 at 17:17










                      • Good point, as is the compression of the set notation. Edits made.
                        – aoi
                        Nov 30 at 17:30













                      up vote
                      1
                      down vote










                      up vote
                      1
                      down vote









                      If we go back to your original attempt, a few quick changes gives the result you wanted. This: removes the $$ around x_{ij} and y_j and moves the & you use for alignment to align the equals signs. Edit: I also compressed the set notation to shorten the long line and returned i and j to math mode, as you currently have them as subscripts in math mode. If you'd prefer them to be set upright you should change the subscripts as well.



                      documentclass{article}
                      usepackage{amsmath}
                      begin{document}
                      begin{align*}
                      x_{ij} &=
                      begin{cases}
                      text{1,} &quadtext{Si se envía agua desde área $i$ ($i in {1,2,dots,10}$) a sitio $j$ ($j in {1,2,dots,7}$)} \
                      text{0,} &quadtext{En caso contrario}
                      end{cases}\
                      y_{j} &=
                      begin{cases}
                      text{1,} &quadtext{ Si se construye planta en el sitio $j$ ($j in {1,2,dots,7}$)} \
                      text{0,} &quadtext{En caso contrario}
                      end{cases}
                      end{align*}
                      end{document}


                      Output:
                      New aligned output






                      share|improve this answer














                      If we go back to your original attempt, a few quick changes gives the result you wanted. This: removes the $$ around x_{ij} and y_j and moves the & you use for alignment to align the equals signs. Edit: I also compressed the set notation to shorten the long line and returned i and j to math mode, as you currently have them as subscripts in math mode. If you'd prefer them to be set upright you should change the subscripts as well.



                      documentclass{article}
                      usepackage{amsmath}
                      begin{document}
                      begin{align*}
                      x_{ij} &=
                      begin{cases}
                      text{1,} &quadtext{Si se envía agua desde área $i$ ($i in {1,2,dots,10}$) a sitio $j$ ($j in {1,2,dots,7}$)} \
                      text{0,} &quadtext{En caso contrario}
                      end{cases}\
                      y_{j} &=
                      begin{cases}
                      text{1,} &quadtext{ Si se construye planta en el sitio $j$ ($j in {1,2,dots,7}$)} \
                      text{0,} &quadtext{En caso contrario}
                      end{cases}
                      end{align*}
                      end{document}


                      Output:
                      New aligned output







                      share|improve this answer














                      share|improve this answer



                      share|improve this answer








                      edited Nov 30 at 17:30

























                      answered Nov 30 at 17:12









                      aoi

                      667




                      667












                      • Since i and j are used in math mode on the LHS, it seems appropriate to use $i$ ($i in {1,dots,10}$) and $j$ ($j in {1,dots,7}$) on the RHS.
                        – Werner
                        Nov 30 at 17:17










                      • Good point, as is the compression of the set notation. Edits made.
                        – aoi
                        Nov 30 at 17:30


















                      • Since i and j are used in math mode on the LHS, it seems appropriate to use $i$ ($i in {1,dots,10}$) and $j$ ($j in {1,dots,7}$) on the RHS.
                        – Werner
                        Nov 30 at 17:17










                      • Good point, as is the compression of the set notation. Edits made.
                        – aoi
                        Nov 30 at 17:30
















                      Since i and j are used in math mode on the LHS, it seems appropriate to use $i$ ($i in {1,dots,10}$) and $j$ ($j in {1,dots,7}$) on the RHS.
                      – Werner
                      Nov 30 at 17:17




                      Since i and j are used in math mode on the LHS, it seems appropriate to use $i$ ($i in {1,dots,10}$) and $j$ ($j in {1,dots,7}$) on the RHS.
                      – Werner
                      Nov 30 at 17:17












                      Good point, as is the compression of the set notation. Edits made.
                      – aoi
                      Nov 30 at 17:30




                      Good point, as is the compression of the set notation. Edits made.
                      – aoi
                      Nov 30 at 17:30










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