Calculations on variables using LaTeX

Clash Royale CLAN TAG#URR8PPP

up vote
3
down vote

favorite

I'm trying to do some basic calculations using values stored on a command, but it doesn't do the calculation:

newcommandlenghtHeatExchanger0.820
newcommandheightHeatExchanger1.081
newcommandareaHeatExchangerlenghtHeatExchanger*heightHeatExchanger

Is there a simple way to do that using LaTeX ?

Thank you.

calculations

share|improve this question

asked 4 hours ago

joseldsm

253

New contributor

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

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  LaTeX has limited ability to do math calculations. Best way is to employ a package that does floating math, such as fp, xfp, or tikz. By the way, length is spelled length rather than lenght.
  – Steven B. Segletes
  4 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  Can you please show an example of how you'd like to use such macros?
  – egreg
  4 hours ago
  

  
  
  
  

add a comment | 

up vote
3
down vote

favorite

I'm trying to do some basic calculations using values stored on a command, but it doesn't do the calculation:

newcommandlenghtHeatExchanger0.820
newcommandheightHeatExchanger1.081
newcommandareaHeatExchangerlenghtHeatExchanger*heightHeatExchanger

Is there a simple way to do that using LaTeX ?

Thank you.

calculations

share|improve this question

asked 4 hours ago

joseldsm

253

New contributor

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

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  LaTeX has limited ability to do math calculations. Best way is to employ a package that does floating math, such as fp, xfp, or tikz. By the way, length is spelled length rather than lenght.
  – Steven B. Segletes
  4 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  Can you please show an example of how you'd like to use such macros?
  – egreg
  4 hours ago
  

  
  
  
  

add a comment | 

up vote
3
down vote

favorite

up vote
3
down vote

favorite

I'm trying to do some basic calculations using values stored on a command, but it doesn't do the calculation:

newcommandlenghtHeatExchanger0.820
newcommandheightHeatExchanger1.081
newcommandareaHeatExchangerlenghtHeatExchanger*heightHeatExchanger

Is there a simple way to do that using LaTeX ?

Thank you.

calculations

share|improve this question

asked 4 hours ago

joseldsm

253

New contributor

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

I'm trying to do some basic calculations using values stored on a command, but it doesn't do the calculation:

newcommandlenghtHeatExchanger0.820
newcommandheightHeatExchanger1.081
newcommandareaHeatExchangerlenghtHeatExchanger*heightHeatExchanger

Is there a simple way to do that using LaTeX ?

Thank you.

calculations

calculations

share|improve this question

asked 4 hours ago

joseldsm

253

New contributor

joseldsm 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

asked 4 hours ago

joseldsm

253

New contributor

joseldsm 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

asked 4 hours ago

joseldsm

253

New contributor

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

asked 4 hours ago

joseldsm

253

asked 4 hours ago

joseldsm

253

253

New contributor

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

New contributor

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

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

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  LaTeX has limited ability to do math calculations. Best way is to employ a package that does floating math, such as fp, xfp, or tikz. By the way, length is spelled length rather than lenght.
  – Steven B. Segletes
  4 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  Can you please show an example of how you'd like to use such macros?
  – egreg
  4 hours ago
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  LaTeX has limited ability to do math calculations. Best way is to employ a package that does floating math, such as fp, xfp, or tikz. By the way, length is spelled length rather than lenght.
  – Steven B. Segletes
  4 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  Can you please show an example of how you'd like to use such macros?
  – egreg
  4 hours ago
  

  
  
  
  

1

1

LaTeX has limited ability to do math calculations. Best way is to employ a package that does floating math, such as fp, xfp, or tikz. By the way, length is spelled length rather than lenght.
– Steven B. Segletes
4 hours ago

LaTeX has limited ability to do math calculations. Best way is to employ a package that does floating math, such as fp, xfp, or tikz. By the way, length is spelled length rather than lenght.
– Steven B. Segletes
4 hours ago

Can you please show an example of how you'd like to use such macros?
– egreg
4 hours ago

Can you please show an example of how you'd like to use such macros?
– egreg
4 hours ago

add a comment | 

3 Answers
3

active

oldest

votes

up vote
1
down vote



accepted

I will suggest to use the calculator package and its MULTIPLY command, see documentation here.
BUT: I think that if you could switch to LuaLaTeX it would surely be the best solution!

share|improve this answer

answered 3 hours ago

Lord Nexprex

583

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Works great and very simple to use, thanks !
  – joseldsm
  2 hours ago
  

  
  
  
  

add a comment | 

up vote
2
down vote

If you're free to employ LuaLaTeX, performing calculations involving macros doesn't require the loading of any external packages, as the following example shows. The solution method exploits the fact that the argument of directlua is expanded automatically. In the current example, docalclength*height is expanded to directluatex.sprint(2.5*4); LuaTeX performs the calculation, and the result (10) replaces docalclength*height; hence, it works out to newcommandarea10.

Of course, if you needn't store the value of the calculation, you could simply run $length times height = docalclength*height$.

documentclassarticle
% set up a LaTeX macro to interface with Lua:
newcommanddocalc[1]directluatex.sprint(#1)
begindocument
newcommandlength2.5
newcommandheight4
newcommandareadocalclength*height

$length times height = area$
enddocument

share|improve this answer

answered 3 hours ago

Mico

265k30355735

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Thank you ! I dont know why it doesnt work. I think it's because I never used LuaLaTeX and I'm not sure exaclty how to use it and what comes with it.
  – joseldsm
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @joseldsm - I assume your TeX system and front-end ediror are set up to compile tex documents with pdfLaTeX. How to switch compilation from pdfLaTeX to LuaLaTeX depends primarily on your editor. Which editing program do you employ?
  – Mico
  2 hours ago
  
  

  
  
  
  

add a comment | 

up vote
1
down vote

xfp provides a number of floating point operations:

documentclassarticle

usepackagexfp

begindocument

newcommandlengthHeatExchanger0.820
newcommandheightHeatExchanger1.081
newcommandareaHeatExchangerfpevallengthHeatExchanger * heightHeatExchanger

$verb|lengthHeatExchanger| = lengthHeatExchanger$

$verb|heightHeatExchanger| = heightHeatExchanger$

$verb|lengthHeatExchanger| times verb|heightHeatExchanger| = areaHeatExchanger$

enddocument

share|improve this answer

answered 2 hours ago

Werner

423k589261593

add a comment | 

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3 Answers
3

active

oldest

votes

3 Answers
3

active

oldest

votes

active

oldest

votes

active

oldest

votes

up vote
1
down vote



accepted

I will suggest to use the calculator package and its MULTIPLY command, see documentation here.
BUT: I think that if you could switch to LuaLaTeX it would surely be the best solution!

share|improve this answer

answered 3 hours ago

Lord Nexprex

583

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Works great and very simple to use, thanks !
  – joseldsm
  2 hours ago
  

  
  
  
  

add a comment | 

up vote
1
down vote



accepted

I will suggest to use the calculator package and its MULTIPLY command, see documentation here.
BUT: I think that if you could switch to LuaLaTeX it would surely be the best solution!

share|improve this answer

answered 3 hours ago

Lord Nexprex

583

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Works great and very simple to use, thanks !
  – joseldsm
  2 hours ago
  

  
  
  
  

add a comment | 

up vote
1
down vote



accepted

up vote
1
down vote



accepted

I will suggest to use the calculator package and its MULTIPLY command, see documentation here.
BUT: I think that if you could switch to LuaLaTeX it would surely be the best solution!

share|improve this answer

answered 3 hours ago

Lord Nexprex

583

I will suggest to use the calculator package and its MULTIPLY command, see documentation here.
BUT: I think that if you could switch to LuaLaTeX it would surely be the best solution!

share|improve this answer

answered 3 hours ago

Lord Nexprex

583

share|improve this answer

share|improve this answer

answered 3 hours ago

Lord Nexprex

583

answered 3 hours ago

Lord Nexprex

583

answered 3 hours ago

Lord Nexprex

583

583

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Works great and very simple to use, thanks !
  – joseldsm
  2 hours ago
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Works great and very simple to use, thanks !
  – joseldsm
  2 hours ago
  

  
  
  
  

Works great and very simple to use, thanks !
– joseldsm
2 hours ago

Works great and very simple to use, thanks !
– joseldsm
2 hours ago

add a comment | 

up vote
2
down vote

If you're free to employ LuaLaTeX, performing calculations involving macros doesn't require the loading of any external packages, as the following example shows. The solution method exploits the fact that the argument of directlua is expanded automatically. In the current example, docalclength*height is expanded to directluatex.sprint(2.5*4); LuaTeX performs the calculation, and the result (10) replaces docalclength*height; hence, it works out to newcommandarea10.

Of course, if you needn't store the value of the calculation, you could simply run $length times height = docalclength*height$.

documentclassarticle
% set up a LaTeX macro to interface with Lua:
newcommanddocalc[1]directluatex.sprint(#1)
begindocument
newcommandlength2.5
newcommandheight4
newcommandareadocalclength*height

$length times height = area$
enddocument

share|improve this answer

answered 3 hours ago

Mico

265k30355735

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Thank you ! I dont know why it doesnt work. I think it's because I never used LuaLaTeX and I'm not sure exaclty how to use it and what comes with it.
  – joseldsm
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @joseldsm - I assume your TeX system and front-end ediror are set up to compile tex documents with pdfLaTeX. How to switch compilation from pdfLaTeX to LuaLaTeX depends primarily on your editor. Which editing program do you employ?
  – Mico
  2 hours ago
  
  

  
  
  
  

add a comment | 

up vote
2
down vote

If you're free to employ LuaLaTeX, performing calculations involving macros doesn't require the loading of any external packages, as the following example shows. The solution method exploits the fact that the argument of directlua is expanded automatically. In the current example, docalclength*height is expanded to directluatex.sprint(2.5*4); LuaTeX performs the calculation, and the result (10) replaces docalclength*height; hence, it works out to newcommandarea10.

Of course, if you needn't store the value of the calculation, you could simply run $length times height = docalclength*height$.

documentclassarticle
% set up a LaTeX macro to interface with Lua:
newcommanddocalc[1]directluatex.sprint(#1)
begindocument
newcommandlength2.5
newcommandheight4
newcommandareadocalclength*height

$length times height = area$
enddocument

share|improve this answer

answered 3 hours ago

Mico

265k30355735

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Thank you ! I dont know why it doesnt work. I think it's because I never used LuaLaTeX and I'm not sure exaclty how to use it and what comes with it.
  – joseldsm
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @joseldsm - I assume your TeX system and front-end ediror are set up to compile tex documents with pdfLaTeX. How to switch compilation from pdfLaTeX to LuaLaTeX depends primarily on your editor. Which editing program do you employ?
  – Mico
  2 hours ago
  
  

  
  
  
  

add a comment | 

up vote
2
down vote

up vote
2
down vote

If you're free to employ LuaLaTeX, performing calculations involving macros doesn't require the loading of any external packages, as the following example shows. The solution method exploits the fact that the argument of directlua is expanded automatically. In the current example, docalclength*height is expanded to directluatex.sprint(2.5*4); LuaTeX performs the calculation, and the result (10) replaces docalclength*height; hence, it works out to newcommandarea10.

Of course, if you needn't store the value of the calculation, you could simply run $length times height = docalclength*height$.

documentclassarticle
% set up a LaTeX macro to interface with Lua:
newcommanddocalc[1]directluatex.sprint(#1)
begindocument
newcommandlength2.5
newcommandheight4
newcommandareadocalclength*height

$length times height = area$
enddocument

share|improve this answer

answered 3 hours ago

Mico

265k30355735

If you're free to employ LuaLaTeX, performing calculations involving macros doesn't require the loading of any external packages, as the following example shows. The solution method exploits the fact that the argument of directlua is expanded automatically. In the current example, docalclength*height is expanded to directluatex.sprint(2.5*4); LuaTeX performs the calculation, and the result (10) replaces docalclength*height; hence, it works out to newcommandarea10.

Of course, if you needn't store the value of the calculation, you could simply run $length times height = docalclength*height$.

documentclassarticle
% set up a LaTeX macro to interface with Lua:
newcommanddocalc[1]directluatex.sprint(#1)
begindocument
newcommandlength2.5
newcommandheight4
newcommandareadocalclength*height

$length times height = area$
enddocument

share|improve this answer

answered 3 hours ago

Mico

265k30355735

share|improve this answer

share|improve this answer

answered 3 hours ago

Mico

265k30355735

answered 3 hours ago

Mico

265k30355735

answered 3 hours ago

Mico

265k30355735

265k30355735

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Thank you ! I dont know why it doesnt work. I think it's because I never used LuaLaTeX and I'm not sure exaclty how to use it and what comes with it.
  – joseldsm
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @joseldsm - I assume your TeX system and front-end ediror are set up to compile tex documents with pdfLaTeX. How to switch compilation from pdfLaTeX to LuaLaTeX depends primarily on your editor. Which editing program do you employ?
  – Mico
  2 hours ago
  
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Thank you ! I dont know why it doesnt work. I think it's because I never used LuaLaTeX and I'm not sure exaclty how to use it and what comes with it.
  – joseldsm
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @joseldsm - I assume your TeX system and front-end ediror are set up to compile tex documents with pdfLaTeX. How to switch compilation from pdfLaTeX to LuaLaTeX depends primarily on your editor. Which editing program do you employ?
  – Mico
  2 hours ago
  
  

  
  
  
  

Thank you ! I dont know why it doesnt work. I think it's because I never used LuaLaTeX and I'm not sure exaclty how to use it and what comes with it.
– joseldsm
2 hours ago

Thank you ! I dont know why it doesnt work. I think it's because I never used LuaLaTeX and I'm not sure exaclty how to use it and what comes with it.
– joseldsm
2 hours ago

@joseldsm - I assume your TeX system and front-end ediror are set up to compile tex documents with pdfLaTeX. How to switch compilation from pdfLaTeX to LuaLaTeX depends primarily on your editor. Which editing program do you employ?
– Mico
2 hours ago

@joseldsm - I assume your TeX system and front-end ediror are set up to compile tex documents with pdfLaTeX. How to switch compilation from pdfLaTeX to LuaLaTeX depends primarily on your editor. Which editing program do you employ?
– Mico
2 hours ago

add a comment | 

up vote
1
down vote

xfp provides a number of floating point operations:

documentclassarticle

usepackagexfp

begindocument

newcommandlengthHeatExchanger0.820
newcommandheightHeatExchanger1.081
newcommandareaHeatExchangerfpevallengthHeatExchanger * heightHeatExchanger

$verb|lengthHeatExchanger| = lengthHeatExchanger$

$verb|heightHeatExchanger| = heightHeatExchanger$

$verb|lengthHeatExchanger| times verb|heightHeatExchanger| = areaHeatExchanger$

enddocument

share|improve this answer

answered 2 hours ago

Werner

423k589261593

add a comment | 

up vote
1
down vote

xfp provides a number of floating point operations:

documentclassarticle

usepackagexfp

begindocument

newcommandlengthHeatExchanger0.820
newcommandheightHeatExchanger1.081
newcommandareaHeatExchangerfpevallengthHeatExchanger * heightHeatExchanger

$verb|lengthHeatExchanger| = lengthHeatExchanger$

$verb|heightHeatExchanger| = heightHeatExchanger$

$verb|lengthHeatExchanger| times verb|heightHeatExchanger| = areaHeatExchanger$

enddocument

share|improve this answer

answered 2 hours ago

Werner

423k589261593

add a comment | 

up vote
1
down vote

up vote
1
down vote

xfp provides a number of floating point operations:

documentclassarticle

usepackagexfp

begindocument

newcommandlengthHeatExchanger0.820
newcommandheightHeatExchanger1.081
newcommandareaHeatExchangerfpevallengthHeatExchanger * heightHeatExchanger

$verb|lengthHeatExchanger| = lengthHeatExchanger$

$verb|heightHeatExchanger| = heightHeatExchanger$

$verb|lengthHeatExchanger| times verb|heightHeatExchanger| = areaHeatExchanger$

enddocument

share|improve this answer

answered 2 hours ago

Werner

423k589261593

xfp provides a number of floating point operations:

documentclassarticle

usepackagexfp

begindocument

newcommandlengthHeatExchanger0.820
newcommandheightHeatExchanger1.081
newcommandareaHeatExchangerfpevallengthHeatExchanger * heightHeatExchanger

$verb|lengthHeatExchanger| = lengthHeatExchanger$

$verb|heightHeatExchanger| = heightHeatExchanger$

$verb|lengthHeatExchanger| times verb|heightHeatExchanger| = areaHeatExchanger$

enddocument

share|improve this answer

answered 2 hours ago

Werner

423k589261593

share|improve this answer

share|improve this answer

answered 2 hours ago

Werner

423k589261593

answered 2 hours ago

Werner

423k589261593

answered 2 hours ago

Werner

423k589261593

423k589261593

add a comment | 

add a comment | 

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

 

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