Pie chart with values instead of percentage

Question

First, I started using LaTeX way too late! Thanks for all the hints on this site.
I looked at the answer of the following question.
How to draw Bar & Pie Chart
This chart uses the value 100 as maxvalue. I want to change it a bit, it should sum up all parameters and use that as the new 100%
Example of a pie chart (sum of 922 as 100%)
pie{Pie XYZ}
{337/div,196/drog,191/verm,118/gew,47/staa}

Here is the original script with my idea in the comment. To be frank I have never use tex-script before, but just with googling I couldn't manage to get what I want.
Any help for a LaTeX noob higly appreciated.
newcommand{pie}[3][]{
    begin{scope}[#1]
    pgfmathsetmacro{curA}{90}
    pgfmathsetmacro{r}{1}
    defc{(0,0)}
    node[pie title] at (90:1.3) {#2};

% Sum all parameters for max value   
%   newcounter{tmpSUM}
%   foreach v / s in{#3}{    
%       setcounter{tmpSUM}{v}
%   }

foreach v/s in{#3}{
%       pgfmathsetmacro{deltaA}{v / tmpSUM *360}
        pgfmathsetmacro{deltaA}{v / 100 *360}

pgfmathsetmacro{nextA}{curA + deltaA}
        pgfmathsetmacro{midA}{(curA+nextA)/2}

path[slice,s] c
            -- +(curA:r)
            arc (curA:nextA:r)
            -- cycle;
       pgfmathsetmacro{d}{max((deltaA * -(.5/50) + 1) , .5)}

begin{pgfonlayer}{foreground}
        path c -- node[pos=d,pie values,values of s]{$v%$} +(midA:r);
        end{pgfonlayer}

globalletcurAnextA
    }
    end{scope}
}

Bordaigorl · Accepted Answer

Your commented solution is closer to the working one.
The idea of looping through the values and accumulating the sum in tmpSUM is quite right but:

you may want to use pgfmath to support non-integer values 
the body of the foreach is in a group so you need global assignments to make the value of the counter escape the scope of the for and be available afterwards (see this answer).

This can be accomplished by

pgfmathsetmacro{tmpSUM}{0}
foreach v/s in{#3}{
    pgfmathparse{tmpSUM+v}
    globallettmpSUMpgfmathresult
}

and then you can use

pgfmathsetmacro{deltaA}{v / tmpSUM * 360}

Svend Tveskæg · Answer

A possible solution using PSTricks with siunitx is as follows:

documentclass{article}

usepackage{pstricks-add}
usepackage[
  round-mode = places,
  round-precision = 0
]{siunitx}
usepackage{xfp}

newcommand*total{fpeval{honey+pollen+water}}
newcommand*Honey{fpeval{honey/total*100}}
newcommand*Pollen{fpeval{pollen/total*100}}
newcommand*Water{fpeval{water/total*100}}

defpieSlice[#1](#2)#3#4#5{%
  rput(psChartI#2){shortstack[c]{%
      SI{#3}{g}strut[-1ex]
      SI{#4}{percent}strut}}
  ncline{psChartO#2}{psChart#2}
  nput{#1}{psChartO#2}{#5}}

% parameters
defhoney{1671}
defpollen{1015}
defwater{621}

begin{document}

psset{nodesepB = -5pt}
begin{pspicture}(-3,-3.5)(4.1,4.1)
  psChart[
    userColor = {red!60, green!60, blue!60},
    chartNodeO = 1.2,
    shadow = true,
    shadowsize = 5pt,
    linewidth = 0
  ]{honey,pollen,water}{}{3}
  pieSlice[90](1){honey}{Honey}{Honey}
  pieSlice[-90](2){pollen}{Pollen}{Pollen}
  pieSlice[0](3){water}{Water}{Water}
end{pspicture}

end{document}

Update

I think I might have misunderstood your request; here is a version showing only the absolute values:

documentclass{article}

usepackage{pstricks-add}
usepackage{siunitx}

defpieSlice[#1](#2)#3#4{%
  rput(psChartI#2){SI{#3}{g}}
  ncline{psChartO#2}{psChart#2}
  nput{#1}{psChartO#2}{#4}}

% parameters
defhoney{1671}
defpollen{1015}
defwater{621}

begin{document}

begin{pspicture}(-3,-3.5)(4.1,4.1)
  psChart[
    userColor = {red!60, green!60, blue!60},
    chartNodeO = 1.2,
    shadowsize = 5pt,
    shadow = true,
    linewidth = 0
  ]{honey,pollen,water}{}{3}
  pieSlice[90](1){honey}{Honey}
  pieSlice[-90](2){pollen}{Pollen}
  pieSlice[0](3){water}{Water}
end{pspicture}

end{document}

Pie chart with values instead of percentage

2 Answers

Add your own answers!

Ask a Question