How to extract two coloumns from each other?

Hi;

I have two "txt" files. I want to extract the second column of "test2" file from the second column of "test1" file. After that; I want to plot linear x vs. logarithmic y axis graphic. (As a matter of fact; x axis is the same in the two files and logarithmic y axis will be of course extracted datas).

Txt files are in the attached files.

Could you please help me?

Answer 1

[Star Strider]

Try this:

test1 = load('test1.txt');                            % Import Data
test2 = load('test2.txt');                            % Import Data
test12 = [test1 test2(:,2)];                                % Concatenate Column #2 Of ‘test2’ To ‘test1’

figure(1)
semilogy(test12(:,1), test12(:,2:3))
grid
legend('Test 1', 'Test 2')