How to define the upper limit of y-scale in a log plot

Hello, i need to plot some graphs of some curves in logarithmic scale on the y-axis and the y-scale must range from 0 to 10^-5. I want to superpose the curves on the same image, thats why the scale must be the same for all plots. I'm currently using semilogy to get a log scale, but the range is completely messed up. I've tryed using

set(gca,'yscale','log')

but again, i don't have control on the upper limits of the y-scale. What can i use to resolve this? Thanks.

Answer 1

[dpb]

You don't give any data nor attach a plot to see the issue specifically, but you set fixed axes limits on log axes the same way as you do for linear ones--use ylim (or set for low-level control or in conjunction with other properties on the axes in one call).

Simple example--

y=[10*rand(10,1), 1E5*rand(10,1)];
hAx=semilogy(y);
ylim([1,1E6])
ylim([.5,4E5])

Salt to suit for your particular case...

Answer 2

[Heyang Qin]

The problem of cannot set axis range such as ylim or xlim in log scale is becaue you cannot set log value to 0. Any value other than 0 will work.

Answer 3

[Meirbek Mussatayev]

Hi,

Please try this code:

set(gca, 'YScale', 'log')
ylim([0 1e-5])