MATLAB: How to plot semilog y graphic in Matlab

Question

Hi;

I have a .txt file with two columns.. Second column is between 180.2E+03 and 11.5. I want to plot second column as a semilog(y) axis. I want the first column to stay in linear X axis. Could you please help me? How can I do this?

You can find file in the attached .txt file.

Thank you..

Answer 1

The matlab function semilogy() is what you need:

https://it.mathworks.com/help/matlab/ref/semilogy.html?searchHighlight=semilogy

A=textread('test_1.txt');
semilogy(A(:,1),A(:,2));
grid on;