Transformation of output of CPU usage

Question

How to convert output of this command ps aux | awk 'NR>1{tot[$3]++;} END{for(id in tot)printf "%s %s\n",id,tot[id]}' into pie chart.

I have tried to make changes in the following pie script using the link:

#!/bin/bash

cat <<"EOHD"
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="500" height="1000" >
<g transform="translate(120,120)">
EOHD
awk '
function rc(){r=rand()*255;g=rand()*255;b=rand()*255;}
BEGIN{srand(6);X=-90;Y=120;}
{   L[NR]=$1;S=S+$1;
    rc();
    printf("<rect x=\"%f\" y=\"%f\" width=\"20\" height=\"20\" fill=\"#%02x%02x%02x\" />\n",
           X,Y,r,g,b);
    #$1="";
    printf("<text x=\"%f\" y=\"%f\">%s</text>\n",X+30,Y+15,$0);
    Y+=25; }
END{srand(6);
    R=100;PX=R;PY=0;
    #PROCINFO["sorted_in"]="@ind_num_asc";
    #for(i in L){       # <--- See: http://xed.ch/blog/2016/1219.html
    for(i=1;i<=length(L);i++){
        T+=L[i]/S;
        A=T*6.283185307;
        L[i]>S/2?B=1:B=0;
        X=R*cos(A);Y=R*sin(A); rc()
        printf("<path d=\"M 0 0 %.6f %.6f A 100 100 0 %d 1 %.6f %.6f z\" fill=\"#%02x%02x%02x\" />\n",
               PX,PY,B,X,Y,r,g,b);
        PX=X;PY=Y;
        }
    }' -

echo "</g></svg>"

Answer 1

The proper input for this script is a 2-columns text, so we need to prepare it first:

ps aux | tail -n +2 | sort -k 3nr | awk 'NR<8{print $2,$3}'

This will output a few most CPU resource consuming PIDs, like this:

10.7 17786
5.5 808
2.5 21290
1.7 285
1.4 896
1.0 981
0.5 444

The first column shows percentage, second lists PIDs. Now, piping this to your pie script will produce the following result: