How can I select a random element in a row of matrix?

Hello

I want to select a a random element in a row and then I want to know the column of this element

Could you Help me?

Thanks

Answer 1

[Image Analyst]

Try this:

yourMatrix = magic(9)  % Sample data
randomColumnNumber = randi(size(yourMatrix, 2), 1)
row = 3; % Whatever
% Get the value of the matrix at this location.
randomValueInRow = yourMatrix(row, randomColumnNumber)

Answer 2

[rifat]

Assuming the data is in 'row'

col=1+floor(rand()*length(row)) % column number of the randomly selected element
  element=row(col) % randomly selected element

[Ji-hwan Hwang]

you create is not resolved. I want to appear in one of two drainage Heat 6-8.

[Walter Roberson]

Ji-hwan Hwang, I do not understand what you mean by "I want to appear in one of two drainage Heat 6-8" ?

If you want to select randomly from column 6 to 8, then

col = randi([6 8]);
element = row(col);