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I try to use the results of pgfmath calculations with cnttest from xifthen, but it fails:



pdflatex (TexLive 2012) produces in the log:

./test.tex:7: Missing number, treated as zero.
<to be read again> 
l.7   \ifthenelse{\cnttest{\val}{>=}{50}}

And in the document (yes, the message leaves the page):

enter image description here

I suspect it's an expansion problem -- something I seem to be unable to wrap my head around. I know that using \pgfmathprintnumber{\pgfmathresult} directly (instead of val does not help. Can I fix this somehow?

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You can simply use \pgfmathtruncatemacro\val{42+77}% to directly save the integer part of the operation result into your \val macro. Then everything works as expected. – Jake Nov 14 '12 at 22:41
@Jake Sweet, thanks. Can you make that an answer? – Raphael Nov 14 '12 at 22:48
Is really \pgfmathparse necessary? If you're dealing with integers, \numexpr is way handier. – egreg Nov 14 '12 at 22:58
@egreg I'm not too familar with the capabilities of either one, but keep in mind that I provided an MWE. Real use cases may not be restricted to integers. – Raphael Nov 14 '12 at 23:16
up vote 3 down vote accepted

You are already using PGF so why not use also the conditionals of PGF ?

  \pgfmathparse{42+77<50? "Small" : "Large"}\pgfmathresult%
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