How to extract a column from a matrix by searching

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Shahar ben ezra
Shahar ben ezra el 26 de Mzo. de 2021
Comentada: dpb el 27 de Mzo. de 2021
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 :)

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Respuesta aceptada

dpb
dpb el 26 de Mzo. de 2021
vWant=11;
vecRes=matrix_test(:,matrix_test(1,:)==vWant);
  2 comentarios
dpb
dpb el 27 de Mzo. de 2021
Look up "logical indexing" -- one of most powerful of MATLAB features.

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