Use RMS(s) to find the RMS of the signal in the time domain, or any time-series data.
Use FRMS(S) to find the RMS of the signal by examining the signal in the frequency domain, i.e. S = FFT(s). FRMS makes use of Parseval's Theorem for its calculations.
Stefan, Mathworks automatically adds BSD licenses when you upload files. There is no copywrite on this, and you are free to use it/edit it/distribute it as you like. Please update your comment/rating.