Finding when data in a matrix exceeds a certain value

Hi,

I am trying to find the onset of damage within a matrix of data. 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

[Star Strider]

To find the row number where the data exceeds zero, use the find function with two outputs:

x = randi(10, 5, 5)-9;          % Example Data
[xr, xc] = find(x > 0);

The ‘xr’ variable here has the row numbers of all the values that exceed zero. (The corresponding column numbers are in ‘xc’.)

[Matt Dodgson]

Brilliant, worked perfectly. Cheers.

[Star Strider]

My pleasure!