Using cwt with ASCII data

I have a large number of ECG files sorted in ASCII format i.e. columns and rows. I import them into MATLAB no problem and do some minor reshaping and removing headers using a few lines of code.

I am wanting to use MATLAB to fine the ECG events and am currently trying to use the 'cwt' function to help me find the beats in each lead. I have been using a piece of code I found here as a guide but am unsure why I am getting the error message 'Underfined function or method 'cwt' for input arguments of type 'single''

I am a very new user to MATLAB so any help would be much appreciated.

Answer 1

[Walter Roberson]

Either you do not have the wavelet toolbox (or do not have it licensed), or else you need to use double() on your data to pass it to cwt()