Arithmetic inside tikz

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I'm having difficulty performing arithmetic inside tikz.

I've written:

 foreach s in 6,...,8
 
 node[draw,red,circle] at (0:(s-2)cm) $s$;
 

Somehow the arithmetic (s-2) is not working, I think its the cm that's causing the issue but I need the measurement in cm.

Also if I write:

 node[draw,red,circle] at (0:s cm) $(s-2)$;

the arithmetic does not work and LaTeX just merrily shows (6-2) (7-2) etc...

tikz-pgf foreach

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edited 3 hours ago

CarLaTeX

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asked 3 hours ago

user50123

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• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Welcome to TeX.SE! Please make your code snippet compilable ...
  – Kurt
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  Here, you must use braces around your formula (tex.stackexchange.com/a/218542/14500) and multiply by 1cm: (0:(s-2)*1cm) .
  – Paul Gaborit
  3 hours ago
  

  
  
  
  

add a comment | 

up vote
2
down vote

favorite

I'm having difficulty performing arithmetic inside tikz.

I've written:

 foreach s in 6,...,8
 
 node[draw,red,circle] at (0:(s-2)cm) $s$;
 

Somehow the arithmetic (s-2) is not working, I think its the cm that's causing the issue but I need the measurement in cm.

Also if I write:

 node[draw,red,circle] at (0:s cm) $(s-2)$;

the arithmetic does not work and LaTeX just merrily shows (6-2) (7-2) etc...

tikz-pgf foreach

share|improve this question

edited 3 hours ago

CarLaTeX

26.2k444116

asked 3 hours ago

user50123

111

New contributor

user50123 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Welcome to TeX.SE! Please make your code snippet compilable ...
  – Kurt
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  Here, you must use braces around your formula (tex.stackexchange.com/a/218542/14500) and multiply by 1cm: (0:(s-2)*1cm) .
  – Paul Gaborit
  3 hours ago
  

  
  
  
  

add a comment | 

up vote
2
down vote

favorite

up vote
2
down vote

favorite

I'm having difficulty performing arithmetic inside tikz.

I've written:

 foreach s in 6,...,8
 
 node[draw,red,circle] at (0:(s-2)cm) $s$;
 

Somehow the arithmetic (s-2) is not working, I think its the cm that's causing the issue but I need the measurement in cm.

Also if I write:

 node[draw,red,circle] at (0:s cm) $(s-2)$;

the arithmetic does not work and LaTeX just merrily shows (6-2) (7-2) etc...

tikz-pgf foreach

share|improve this question

edited 3 hours ago

CarLaTeX

26.2k444116

asked 3 hours ago

user50123

111

New contributor

user50123 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

I'm having difficulty performing arithmetic inside tikz.

I've written:

 foreach s in 6,...,8
 
 node[draw,red,circle] at (0:(s-2)cm) $s$;
 

Somehow the arithmetic (s-2) is not working, I think its the cm that's causing the issue but I need the measurement in cm.

Also if I write:

 node[draw,red,circle] at (0:s cm) $(s-2)$;

the arithmetic does not work and LaTeX just merrily shows (6-2) (7-2) etc...

tikz-pgf foreach

tikz-pgf foreach

share|improve this question

edited 3 hours ago

CarLaTeX

26.2k444116

asked 3 hours ago

user50123

111

New contributor

user50123 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

edited 3 hours ago

CarLaTeX

26.2k444116

asked 3 hours ago

user50123

111

New contributor

user50123 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

edited 3 hours ago

CarLaTeX

26.2k444116

edited 3 hours ago

CarLaTeX

26.2k444116

edited 3 hours ago

CarLaTeX

26.2k444116

26.2k444116

asked 3 hours ago

user50123

111

New contributor

user50123 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 3 hours ago

user50123

111

asked 3 hours ago

user50123

111

111

New contributor

user50123 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

New contributor

user50123 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

user50123 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Welcome to TeX.SE! Please make your code snippet compilable ...
  – Kurt
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  Here, you must use braces around your formula (tex.stackexchange.com/a/218542/14500) and multiply by 1cm: (0:(s-2)*1cm) .
  – Paul Gaborit
  3 hours ago
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Welcome to TeX.SE! Please make your code snippet compilable ...
  – Kurt
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  Here, you must use braces around your formula (tex.stackexchange.com/a/218542/14500) and multiply by 1cm: (0:(s-2)*1cm) .
  – Paul Gaborit
  3 hours ago
  

  
  
  
  

1

1

Welcome to TeX.SE! Please make your code snippet compilable ...
– Kurt
3 hours ago

Welcome to TeX.SE! Please make your code snippet compilable ...
– Kurt
3 hours ago

2

2

Here, you must use braces around your formula (tex.stackexchange.com/a/218542/14500) and multiply by 1cm: (0:(s-2)*1cm) .
– Paul Gaborit
3 hours ago

Here, you must use braces around your formula (tex.stackexchange.com/a/218542/14500) and multiply by 1cm: (0:(s-2)*1cm) .
– Paul Gaborit
3 hours ago

add a comment | 

2 Answers
2

active

oldest

votes

up vote
2
down vote

You can't use arithmetic as you shown directly (in the description of a node or if you explicitly put a unit of measure after it).

Just use evaluate option of the foreach macro.

Here I create a new variable mys which assumes the value s-2.

In my first tikzpicture, mys is used for positioning; in the second, for description:

documentclassarticle
usepackagetikz
begindocument
begintikzpicture
 foreach[evaluate=s as mys using int(s-2)] s in 6,...,8
 
 node[draw,red,circle] at (0:mys cm) $s$;
 
 endtikzpicture

 begintikzpicture
 foreach[evaluate=s as mys using int(s-2)] s in 6,...,8
 
 node[draw,red,circle] at (0:s cm) $mys$;
 
 endtikzpicture
enddocument

share|improve this answer

edited 3 hours ago

answered 3 hours ago

CarLaTeX

26.2k444116

add a comment | 

up vote
1
down vote

The unit of tikz is the cm, so it is useless to specify it. As for the calculations, they are done here without the need for brackets.

documentclass[tikz,border=5mm]standalone
usetikzlibraryshadows,fadings
usetikzlibrarycalc
usetikzlibrarypositioning

begindocument
 begintikzpicture
node[draw,blue,circle] at(0:2cm)4;
node[draw,blue,circle] at(0:3)5;
node[draw,blue,circle] at(0:4cm)6;
 foreach s in 6,...,8
 
 node[fill=red,circle,opacity=.5] at (0:s-2) $s$;
 
endtikzpicture
enddocument

If you still want to specify the unit, it is necessary to do it after each of the Numbers: (0:s cm-2cm) $s$;

Or to do as indicated by @PaulGaborit by factoring the unit: (0:(s-2)*1cm)

share|improve this answer

edited 1 hour ago

answered 3 hours ago

AndréC

4,3021833

add a comment | 

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

active

oldest

votes

active

oldest

votes

up vote
2
down vote

You can't use arithmetic as you shown directly (in the description of a node or if you explicitly put a unit of measure after it).

Just use evaluate option of the foreach macro.

Here I create a new variable mys which assumes the value s-2.

In my first tikzpicture, mys is used for positioning; in the second, for description:

documentclassarticle
usepackagetikz
begindocument
begintikzpicture
 foreach[evaluate=s as mys using int(s-2)] s in 6,...,8
 
 node[draw,red,circle] at (0:mys cm) $s$;
 
 endtikzpicture

 begintikzpicture
 foreach[evaluate=s as mys using int(s-2)] s in 6,...,8
 
 node[draw,red,circle] at (0:s cm) $mys$;
 
 endtikzpicture
enddocument

share|improve this answer

edited 3 hours ago

answered 3 hours ago

CarLaTeX

26.2k444116

add a comment | 

up vote
2
down vote

You can't use arithmetic as you shown directly (in the description of a node or if you explicitly put a unit of measure after it).

Just use evaluate option of the foreach macro.

Here I create a new variable mys which assumes the value s-2.

In my first tikzpicture, mys is used for positioning; in the second, for description:

documentclassarticle
usepackagetikz
begindocument
begintikzpicture
 foreach[evaluate=s as mys using int(s-2)] s in 6,...,8
 
 node[draw,red,circle] at (0:mys cm) $s$;
 
 endtikzpicture

 begintikzpicture
 foreach[evaluate=s as mys using int(s-2)] s in 6,...,8
 
 node[draw,red,circle] at (0:s cm) $mys$;
 
 endtikzpicture
enddocument

share|improve this answer

edited 3 hours ago

answered 3 hours ago

CarLaTeX

26.2k444116

add a comment | 

up vote
2
down vote

up vote
2
down vote

You can't use arithmetic as you shown directly (in the description of a node or if you explicitly put a unit of measure after it).

Just use evaluate option of the foreach macro.

Here I create a new variable mys which assumes the value s-2.

In my first tikzpicture, mys is used for positioning; in the second, for description:

documentclassarticle
usepackagetikz
begindocument
begintikzpicture
 foreach[evaluate=s as mys using int(s-2)] s in 6,...,8
 
 node[draw,red,circle] at (0:mys cm) $s$;
 
 endtikzpicture

 begintikzpicture
 foreach[evaluate=s as mys using int(s-2)] s in 6,...,8
 
 node[draw,red,circle] at (0:s cm) $mys$;
 
 endtikzpicture
enddocument

share|improve this answer

edited 3 hours ago

answered 3 hours ago

CarLaTeX

26.2k444116

You can't use arithmetic as you shown directly (in the description of a node or if you explicitly put a unit of measure after it).

Just use evaluate option of the foreach macro.

Here I create a new variable mys which assumes the value s-2.

In my first tikzpicture, mys is used for positioning; in the second, for description:

documentclassarticle
usepackagetikz
begindocument
begintikzpicture
 foreach[evaluate=s as mys using int(s-2)] s in 6,...,8
 
 node[draw,red,circle] at (0:mys cm) $s$;
 
 endtikzpicture

 begintikzpicture
 foreach[evaluate=s as mys using int(s-2)] s in 6,...,8
 
 node[draw,red,circle] at (0:s cm) $mys$;
 
 endtikzpicture
enddocument

share|improve this answer

edited 3 hours ago

answered 3 hours ago

CarLaTeX

26.2k444116

share|improve this answer

share|improve this answer

edited 3 hours ago

edited 3 hours ago

edited 3 hours ago

answered 3 hours ago

CarLaTeX

26.2k444116

answered 3 hours ago

CarLaTeX

26.2k444116

answered 3 hours ago

CarLaTeX

26.2k444116

26.2k444116

add a comment | 

add a comment | 

up vote
1
down vote

The unit of tikz is the cm, so it is useless to specify it. As for the calculations, they are done here without the need for brackets.

documentclass[tikz,border=5mm]standalone
usetikzlibraryshadows,fadings
usetikzlibrarycalc
usetikzlibrarypositioning

begindocument
 begintikzpicture
node[draw,blue,circle] at(0:2cm)4;
node[draw,blue,circle] at(0:3)5;
node[draw,blue,circle] at(0:4cm)6;
 foreach s in 6,...,8
 
 node[fill=red,circle,opacity=.5] at (0:s-2) $s$;
 
endtikzpicture
enddocument

If you still want to specify the unit, it is necessary to do it after each of the Numbers: (0:s cm-2cm) $s$;

Or to do as indicated by @PaulGaborit by factoring the unit: (0:(s-2)*1cm)

share|improve this answer

edited 1 hour ago

answered 3 hours ago

AndréC

4,3021833

add a comment | 

up vote
1
down vote

The unit of tikz is the cm, so it is useless to specify it. As for the calculations, they are done here without the need for brackets.

documentclass[tikz,border=5mm]standalone
usetikzlibraryshadows,fadings
usetikzlibrarycalc
usetikzlibrarypositioning

begindocument
 begintikzpicture
node[draw,blue,circle] at(0:2cm)4;
node[draw,blue,circle] at(0:3)5;
node[draw,blue,circle] at(0:4cm)6;
 foreach s in 6,...,8
 
 node[fill=red,circle,opacity=.5] at (0:s-2) $s$;
 
endtikzpicture
enddocument

If you still want to specify the unit, it is necessary to do it after each of the Numbers: (0:s cm-2cm) $s$;

Or to do as indicated by @PaulGaborit by factoring the unit: (0:(s-2)*1cm)

share|improve this answer

edited 1 hour ago

answered 3 hours ago

AndréC

4,3021833

add a comment | 

up vote
1
down vote

up vote
1
down vote

The unit of tikz is the cm, so it is useless to specify it. As for the calculations, they are done here without the need for brackets.

documentclass[tikz,border=5mm]standalone
usetikzlibraryshadows,fadings
usetikzlibrarycalc
usetikzlibrarypositioning

begindocument
 begintikzpicture
node[draw,blue,circle] at(0:2cm)4;
node[draw,blue,circle] at(0:3)5;
node[draw,blue,circle] at(0:4cm)6;
 foreach s in 6,...,8
 
 node[fill=red,circle,opacity=.5] at (0:s-2) $s$;
 
endtikzpicture
enddocument

If you still want to specify the unit, it is necessary to do it after each of the Numbers: (0:s cm-2cm) $s$;

Or to do as indicated by @PaulGaborit by factoring the unit: (0:(s-2)*1cm)

share|improve this answer

edited 1 hour ago

answered 3 hours ago

AndréC

4,3021833

The unit of tikz is the cm, so it is useless to specify it. As for the calculations, they are done here without the need for brackets.

documentclass[tikz,border=5mm]standalone
usetikzlibraryshadows,fadings
usetikzlibrarycalc
usetikzlibrarypositioning

begindocument
 begintikzpicture
node[draw,blue,circle] at(0:2cm)4;
node[draw,blue,circle] at(0:3)5;
node[draw,blue,circle] at(0:4cm)6;
 foreach s in 6,...,8
 
 node[fill=red,circle,opacity=.5] at (0:s-2) $s$;
 
endtikzpicture
enddocument

If you still want to specify the unit, it is necessary to do it after each of the Numbers: (0:s cm-2cm) $s$;

Or to do as indicated by @PaulGaborit by factoring the unit: (0:(s-2)*1cm)

share|improve this answer

edited 1 hour ago

answered 3 hours ago

AndréC

4,3021833

share|improve this answer

share|improve this answer

edited 1 hour ago

edited 1 hour ago

edited 1 hour ago

answered 3 hours ago

AndréC

4,3021833

answered 3 hours ago

AndréC

4,3021833

answered 3 hours ago

AndréC

4,3021833

4,3021833

add a comment | 

add a comment | 

user50123 is a new contributor. Be nice, and check out our Code of Conduct.

 

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user50123 is a new contributor. Be nice, and check out our Code of Conduct.

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