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how to set y-axis as log scale?

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I am plotting x-y plot using plot function. I want to set only y-axis as log scale and x-axis as linear? How to do that? I used loglog function but it scales both axis but I want only Y.

Risposta accettata

Walter Roberson
Walter Roberson il 22 Set 2023
Modificato: MathWorks Support Team il 22 Set 2023
The best way to create that type of axes is to use the semilogy function. Alternatively, you can set the ‘YScale’ property on the axes:
set(gca, 'YScale', 'log')
***Update from Mathworks Support Team - September 2023***
As of R2023b, you can also use the 'yscale ' function. 
  18 Commenti
Weirong Sun
Weirong Sun il 9 Mag 2022
good answer! It's very helpful!!!
mingyang zhao
mingyang zhao il 2 Ago 2023
Great answer! Thank you!

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Più risposte (2)

Rohit Sinha
Rohit Sinha il 27 Apr 2022
The easiest way to do this is simply use the following command instead of plot
This will plot x axis on a linear scale and y axis on a log scale. Similarly, if you want to plot x axis on log scale and y axis on a linear scale, you can use
semilogx(x,y) ;
  2 Commenti
Walter Roberson
Walter Roberson il 27 Apr 2022
semilogy() is the first thing I mentioned in my answer in 2016.
Nicholas Santiago
Nicholas Santiago il 4 Nov 2022
yo i totally missed that I generally only read the bold stuff, thanks a ton!

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Toshia M
Toshia M il 20 Set 2023
Starting in R2023b, you can change the scale of any axis after you create the plot by calling the xscale, yscale, or zscale function.
For example, create a plot of two vectors x and y. Then set the scale of the y-axis to logarithmic.
x = 1:100;
y = x.^2;
grid on
yscale log


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