How to extract a column from a matrix by searching

hi

I have an example of something I need

I want to take out a column in the matrix by searching in the first row

clc, clear
frequency = linspace(1,20,20);
amp = randi([-100,-60],10,20);
matrix_test = [frequency;amp]

[my_vec_For_example_num_11] = find(matrix_test==11) % I want to enter a number from 1 to 20 and take out its column
i_want_vec_11=matrix_test(1:end,11)  %That should be the result,

The solution does not have to be with "find"

tnx :)

Answer 1

[dpb]

vWant=11;
vecRes=matrix_test(:,matrix_test(1,:)==vWant);

[Shahar ben ezra]

tnx!

[dpb]

Look up "logical indexing" -- one of most powerful of MATLAB features.