Base-2 logarithmic scale on bar diagram

Hello,

I would like to plot a bar diagram but with a base-2 logarithmic scale on y-axis. Is it possible to have a logarithmic scale with the bar function ? Can someone help me ?

Here is an example of a diagram with a linear scale on which I would like to use a base-2 logarithmic scale on y-axis

figure;
set(gcf,'color','w');
x=[1 2 3 4];
y= [3 0.76 .82
4.2 1.1 0.9
2.5 0.75 0.85
0.8 0.9 3.5];
b= bar (x,y,1);

[dpb]

What, specifically, is the expected result to look like? Since

log2(y)=log10(y)/log10(2)

by definition, it's a linear scaling so just using

...
hB=bar(x,y,1);
hAx=gca; hAx.YScale='log';

will produce the same relative bar heights as those if you were to mess around with the log2() values and scale them.

Answer 1

[David Hill]

A logarithmic scale does not matter what the base is. You can change the markers to whatever you want (powers of two).

figure;
set(gcf,'color','w');
x=[1 2 3 4];
y= [3 0.76 .82
4.2 1.1 0.9
2.5 0.75 0.85
0.8 0.9 3.5];
b= bar (x,y,1);
set(gca, 'YScale', 'log')