Matlab bar plot grouped but in different y scales

Question

I have two sets of data, and I want to plot using bar graph. But the problem is these two sets of data are at quite different scale. If I just use the bar(A), i

Answer 1

This uses the plotyy(x1,y1,x2,y2,fun1,fun2) variant of plotyy:

%// Set these three variables as desired
offset = (x(2)-x(1))/8;
width = (x(2)-x(1))/4;
colors = {'b','g'};

%// Do the plot
plotyy(x-offset,y1,x+offset,y2, @(x,y) bar(x,y,width,colors{1}), @(x,y) bar(x,y,width,colors{2}));

If you prefer x-ticks to appear only on used x values:

h = plotyy(x-offset,y1,x+offset,y2, @(x,y) bar(x,y,width,colors{1}), @(x,y) bar(x,y,width,colors{2}));
set(h,'xtick',x)