How to extract two coloumns from each other?

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nancy 2017-1-3

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https://ww2.mathworks.cn/matlabcentral/answers/318936-how-to-extract-two-coloumns-from-each-other

关闭： MATLAB Answer Bot 2021-8-20

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?

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Answer 1

Star Strider 2017-1-3

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https://ww2.mathworks.cn/matlabcentral/answers/318936-how-to-extract-two-coloumns-from-each-other#answer_249282

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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')