Finding when data in a matrix exceeds a certain value

Hi,

I am trying to find the onset of damage within a data 'X' which is a 4373x1 matrix . I have subtracted away the standard deviation of the data and am now trying to find where the data is larger than the standard deviation, i.e. greater than 0.

Is there a function in MATLAB that will tell me when the data exceeds 0 and will print the row number?

Thanks

Answer 1

[David Young]

find(X > 0, 1)

Answer 2

[Guillaume]

Use find:

[row, column] = find(m > 0)

or if you just want the row:

[row, ~] = find(m > 0) %you still need to ask for both, otherwise you get linear indices