# How changing the loglog scale x and y axis?

50 views (last 30 days)
Emrys on 3 Oct 2017
Commented: Walter Roberson on 3 Oct 2017
I need to represent numbers from 0.5 to 50 (0.5 5 50) instead of 1 10 100(standard log log scale) is it possible? how can i do?

Walter Roberson on 3 Oct 2017
x = sort( rand(1,40)*49.5 + 0.5 );
y = x.*abs(sin(x));
loglog(x,y)
xlim([0.5 50])
ylim([0.5 50])
nticks = 5;
tickpos = round( logspace(log10(0.5),log10(50), nticks) );
set(gca, 'XTick', tickpos, 'YTick', tickpos)
##### 2 CommentsShowHide 1 older comment
Walter Roberson on 3 Oct 2017
tickpos = [0.5 5 50];
set(gca, 'XTick', tickpos, 'YTick', tickpos)

David J. Mack on 3 Oct 2017
Edited: David J. Mack on 3 Oct 2017
Have you tried to use semilogy instead of loglog, e.g.:
semilogy(x,y);
If you have to use loglog, use the 'XScale'-Property instead:
loglog(x,y);
set(gca,'XScale','linear');
In both cases you can set the x-tick & the x-axis limit, using:
set(gca, 'XTick',[0.5 5:5:50], 'XLim',[0.5 50]);
Greetings, David