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11.63 Sample ‘hist’ ¶

Example of hist (histogram).

MGL code:

new x 10000 '2*rnd-1':new y 10000 '2*rnd-1':copy z exp(-6*(x^2+y^2))
hist xx x z:norm xx 0 1:hist yy y z:norm yy 0 1
multiplot 3 3 3 2 2 '':ranges -1 1 -1 1 0 1:box:dots x y z 'wyrRk'
multiplot 3 3 0 2 1 '':ranges -1 1 0 1:box:bars xx
multiplot 3 3 5 1 2 '':ranges 0 1 -1 1:box:barh yy
subplot 3 3 2:text 0.5 0.5 'Hist and\n{}MultiPlot\n{}sample' 'a' -3

C++ code:

void smgl_hist(mglGraph *gr)
{
	mglData x(10000), y(10000), z(10000);	gr->Fill(x,"2*rnd-1");	gr->Fill(y,"2*rnd-1");	gr->Fill(z,"exp(-6*(v^2+w^2))",x,y);
	mglData xx=gr->Hist(x,z), yy=gr->Hist(y,z);	xx.Norm(0,1);	yy.Norm(0,1);
	gr->MultiPlot(3,3,3,2,2,"");	gr->SetRanges(-1,1,-1,1,0,1);	gr->Box();	gr->Dots(x,y,z,"wyrRk");
	gr->MultiPlot(3,3,0,2,1,"");	gr->SetRanges(-1,1,0,1);	gr->Box();	gr->Bars(xx);
	gr->MultiPlot(3,3,5,1,2,"");	gr->SetRanges(0,1,-1,1);	gr->Box();	gr->Barh(yy);
	gr->SubPlot(3,3,2);		gr->Puts(mglPoint(0.5,0.5),"Hist and\nMultiPlot\nsample","a",-3);
}