2.5.11 Chart sample

Function chart draw colored boxes with width proportional to data values. Use ‘’ for empty box. Plot looks most attractive in polar coordinates – well known pie chart. The sample code is:

int sample(mglGraph *gr)
{
 mglData ch(7,2); for(int i=0;i<7*2;i++) ch.a[i]=mgl_rnd()+0.1;
 gr->SubPlot(2,2,0); gr->Title("Chart plot (default)");
 gr->Light(true); gr->Rotate(50,60); gr->Box(); gr->Chart(ch);
 gr->SubPlot(2,2,1); gr->Title("'\\#' style");
 gr->Rotate(50,60); gr->Box(); gr->Chart(ch,"#");
 gr->SubPlot(2,2,2); gr->Title("Pie chart; ' ' color");
 gr->SetFunc("(y+1)/2*cos(pi*x)","(y+1)/2*sin(pi*x)","");
 gr->Rotate(50,60); gr->Box(); gr->Chart(ch,"bgr cmy#");
 gr->SubPlot(2,2,3); gr->Title("Ring chart; ' ' color");
 gr->SetFunc("(y+2)/3*cos(pi*x)","(y+2)/3*sin(pi*x)","");
 gr->Rotate(50,60); gr->Box(); gr->Chart(ch,"bgr cmy#");
 return 0;
}

This document was generated on March 21, 2014 using texi2html 5.0.