How do I isolate certain portions of my data in a time series?

Sorry, I am new ot MatLab and I have a 429x18 array measuring 18 different parameters - one of those being downwelling shortwave radiation. I need to isolate any data in the time series with shortwave downwelling >20 Wm-2. My professor mentions using "ii=find(Rsw>20)" to find the indices ii I am looking for, but I am having a hard time actually typing this into MatLab in the correct format it seems.

[Mathieu NOE]

hi

have you looked at the help (type help find in the command window)

Answer 1

[Prudhvi Peddagoni]

Hi,

there is a way to extract elements from the matrix based on some predefined conditions.

please refer this answer for the steps to do this.

Hope this helps.