一些作图技巧

colormap

dif=abs(a-b);

imshow(dif,[]);

colormap(jet);

colorbar;

多个legend

figure;

Plota=plot(a);hold on;

Plotb=plot(b);hold on;

Plotc=plot(c);hold on;

PlotA=plot(A);hold on;

PlotB=plot(B);hold on;

PlotC=plot(C);hold on;

legend(‘a’,’b’,’c’) ;

newAxis=axes('position',get(gca,'position'),... 'visible','off');

legend(newAxis,[PlotAPlotBPlotC],’A’,’B’,’C’) ;