Display elementary math without evaluating
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3
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Given a list of operators and integers, for instance
oper = {Subtract, Times, Plus}
{a, b, c, d} = {3, 5, 4, 9}
I would like to print
oper[[2]][oper[[1]] @@ {a, b}, oper[[3]] @@ {c, d}]
as $(3-5)times (4+9)$ (set aside the $LaTeX$ formatting, I just mean the numbers and the operators in a classical way). Whenever I use Hold
, Unevaluate
or Inactivate
, the oper[[2]]
and similar are not evaluated. Also the operator names are not replaced with their symbols.
Any hints?
hold display
add a comment |
up vote
3
down vote
favorite
Given a list of operators and integers, for instance
oper = {Subtract, Times, Plus}
{a, b, c, d} = {3, 5, 4, 9}
I would like to print
oper[[2]][oper[[1]] @@ {a, b}, oper[[3]] @@ {c, d}]
as $(3-5)times (4+9)$ (set aside the $LaTeX$ formatting, I just mean the numbers and the operators in a classical way). Whenever I use Hold
, Unevaluate
or Inactivate
, the oper[[2]]
and similar are not evaluated. Also the operator names are not replaced with their symbols.
Any hints?
hold display
For the purpose of displaying, consider strings.
– Αλέξανδρος Ζεγγ
Nov 29 at 0:59
add a comment |
up vote
3
down vote
favorite
up vote
3
down vote
favorite
Given a list of operators and integers, for instance
oper = {Subtract, Times, Plus}
{a, b, c, d} = {3, 5, 4, 9}
I would like to print
oper[[2]][oper[[1]] @@ {a, b}, oper[[3]] @@ {c, d}]
as $(3-5)times (4+9)$ (set aside the $LaTeX$ formatting, I just mean the numbers and the operators in a classical way). Whenever I use Hold
, Unevaluate
or Inactivate
, the oper[[2]]
and similar are not evaluated. Also the operator names are not replaced with their symbols.
Any hints?
hold display
Given a list of operators and integers, for instance
oper = {Subtract, Times, Plus}
{a, b, c, d} = {3, 5, 4, 9}
I would like to print
oper[[2]][oper[[1]] @@ {a, b}, oper[[3]] @@ {c, d}]
as $(3-5)times (4+9)$ (set aside the $LaTeX$ formatting, I just mean the numbers and the operators in a classical way). Whenever I use Hold
, Unevaluate
or Inactivate
, the oper[[2]]
and similar are not evaluated. Also the operator names are not replaced with their symbols.
Any hints?
hold display
hold display
asked Nov 28 at 21:50
anderstood
7,7441858
7,7441858
For the purpose of displaying, consider strings.
– Αλέξανδρος Ζεγγ
Nov 29 at 0:59
add a comment |
For the purpose of displaying, consider strings.
– Αλέξανδρος Ζεγγ
Nov 29 at 0:59
For the purpose of displaying, consider strings.
– Αλέξανδρος Ζεγγ
Nov 29 at 0:59
For the purpose of displaying, consider strings.
– Αλέξανδρος Ζεγγ
Nov 29 at 0:59
add a comment |
2 Answers
2
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oldest
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up vote
6
down vote
ClearAll[a, b, c, d, oper]
oper = {Subtract, Inactive@Times, Inactive@Plus} /.
Subtract -> (HoldForm[Plus[#, -#2]] &);
{a, b, c, d} = {3, 5, 4, 9};
oper[[2]][oper[[1]] @@ {a, b}, oper[[3]] @@ {c, d}]
add a comment |
up vote
1
down vote
(3 - 5)*(4 + 9) // Inactivate
$(3 {color{#b39980}+}{text{ -}5})*(4 {color{#b39980}+} 9)$
If you only want to inactivate the heads that appear in oper
while others occur:
hold = Function[e, Unevaluated[e] /. HoldPattern[oper[[a_]]] :>
Inactive[Evaluate[oper[[a]]]], HoldAllComplete];
oper[[2]][oper[[1]] @@ {a, b}, oper[[3]] @@ {c, d}] // hold
${color{#b39980}Scolor{#b39980}ucolor{#b39980}bcolor{#b39980}tcolor{#b39980}rcolor{#b39980}acolor{#b39980}ccolor{#b39980}t}[3,5]{ color{#b39980}* }(4{ color{#b39980}+ }9)$
% /. Inactive[Subtract][a_, b_] :> (HoldForm[Plus[a, -b]])
$(3-5){ color{#b39980}* }(4{ color{#b39980}+ }9)$
add a comment |
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
6
down vote
ClearAll[a, b, c, d, oper]
oper = {Subtract, Inactive@Times, Inactive@Plus} /.
Subtract -> (HoldForm[Plus[#, -#2]] &);
{a, b, c, d} = {3, 5, 4, 9};
oper[[2]][oper[[1]] @@ {a, b}, oper[[3]] @@ {c, d}]
add a comment |
up vote
6
down vote
ClearAll[a, b, c, d, oper]
oper = {Subtract, Inactive@Times, Inactive@Plus} /.
Subtract -> (HoldForm[Plus[#, -#2]] &);
{a, b, c, d} = {3, 5, 4, 9};
oper[[2]][oper[[1]] @@ {a, b}, oper[[3]] @@ {c, d}]
add a comment |
up vote
6
down vote
up vote
6
down vote
ClearAll[a, b, c, d, oper]
oper = {Subtract, Inactive@Times, Inactive@Plus} /.
Subtract -> (HoldForm[Plus[#, -#2]] &);
{a, b, c, d} = {3, 5, 4, 9};
oper[[2]][oper[[1]] @@ {a, b}, oper[[3]] @@ {c, d}]
ClearAll[a, b, c, d, oper]
oper = {Subtract, Inactive@Times, Inactive@Plus} /.
Subtract -> (HoldForm[Plus[#, -#2]] &);
{a, b, c, d} = {3, 5, 4, 9};
oper[[2]][oper[[1]] @@ {a, b}, oper[[3]] @@ {c, d}]
answered Nov 28 at 22:05
kglr
174k9196402
174k9196402
add a comment |
add a comment |
up vote
1
down vote
(3 - 5)*(4 + 9) // Inactivate
$(3 {color{#b39980}+}{text{ -}5})*(4 {color{#b39980}+} 9)$
If you only want to inactivate the heads that appear in oper
while others occur:
hold = Function[e, Unevaluated[e] /. HoldPattern[oper[[a_]]] :>
Inactive[Evaluate[oper[[a]]]], HoldAllComplete];
oper[[2]][oper[[1]] @@ {a, b}, oper[[3]] @@ {c, d}] // hold
${color{#b39980}Scolor{#b39980}ucolor{#b39980}bcolor{#b39980}tcolor{#b39980}rcolor{#b39980}acolor{#b39980}ccolor{#b39980}t}[3,5]{ color{#b39980}* }(4{ color{#b39980}+ }9)$
% /. Inactive[Subtract][a_, b_] :> (HoldForm[Plus[a, -b]])
$(3-5){ color{#b39980}* }(4{ color{#b39980}+ }9)$
add a comment |
up vote
1
down vote
(3 - 5)*(4 + 9) // Inactivate
$(3 {color{#b39980}+}{text{ -}5})*(4 {color{#b39980}+} 9)$
If you only want to inactivate the heads that appear in oper
while others occur:
hold = Function[e, Unevaluated[e] /. HoldPattern[oper[[a_]]] :>
Inactive[Evaluate[oper[[a]]]], HoldAllComplete];
oper[[2]][oper[[1]] @@ {a, b}, oper[[3]] @@ {c, d}] // hold
${color{#b39980}Scolor{#b39980}ucolor{#b39980}bcolor{#b39980}tcolor{#b39980}rcolor{#b39980}acolor{#b39980}ccolor{#b39980}t}[3,5]{ color{#b39980}* }(4{ color{#b39980}+ }9)$
% /. Inactive[Subtract][a_, b_] :> (HoldForm[Plus[a, -b]])
$(3-5){ color{#b39980}* }(4{ color{#b39980}+ }9)$
add a comment |
up vote
1
down vote
up vote
1
down vote
(3 - 5)*(4 + 9) // Inactivate
$(3 {color{#b39980}+}{text{ -}5})*(4 {color{#b39980}+} 9)$
If you only want to inactivate the heads that appear in oper
while others occur:
hold = Function[e, Unevaluated[e] /. HoldPattern[oper[[a_]]] :>
Inactive[Evaluate[oper[[a]]]], HoldAllComplete];
oper[[2]][oper[[1]] @@ {a, b}, oper[[3]] @@ {c, d}] // hold
${color{#b39980}Scolor{#b39980}ucolor{#b39980}bcolor{#b39980}tcolor{#b39980}rcolor{#b39980}acolor{#b39980}ccolor{#b39980}t}[3,5]{ color{#b39980}* }(4{ color{#b39980}+ }9)$
% /. Inactive[Subtract][a_, b_] :> (HoldForm[Plus[a, -b]])
$(3-5){ color{#b39980}* }(4{ color{#b39980}+ }9)$
(3 - 5)*(4 + 9) // Inactivate
$(3 {color{#b39980}+}{text{ -}5})*(4 {color{#b39980}+} 9)$
If you only want to inactivate the heads that appear in oper
while others occur:
hold = Function[e, Unevaluated[e] /. HoldPattern[oper[[a_]]] :>
Inactive[Evaluate[oper[[a]]]], HoldAllComplete];
oper[[2]][oper[[1]] @@ {a, b}, oper[[3]] @@ {c, d}] // hold
${color{#b39980}Scolor{#b39980}ucolor{#b39980}bcolor{#b39980}tcolor{#b39980}rcolor{#b39980}acolor{#b39980}ccolor{#b39980}t}[3,5]{ color{#b39980}* }(4{ color{#b39980}+ }9)$
% /. Inactive[Subtract][a_, b_] :> (HoldForm[Plus[a, -b]])
$(3-5){ color{#b39980}* }(4{ color{#b39980}+ }9)$
answered Nov 29 at 8:57
Coolwater
14.4k32452
14.4k32452
add a comment |
add a comment |
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For the purpose of displaying, consider strings.
– Αλέξανδρος Ζεγγ
Nov 29 at 0:59