I've used the fit function a few times on creep data sets (i.e. time vs displacement) and have been using the 'exp2' fit type. On smaller data sets I've had no problem using this function. Now I'm looking at a 10 folder bigger data set and am getting an error.
I was previously running this and had no problem
[creep_data_fit, gof] = fit(creep_data(1:1800,1),creep_data(1:1800,2), 'exp2')
Now I'm running this and getting the following error
[creep_data_fit, gof] = fit(creep_data(1:10800,1),creep_data(1:10800,2), 'exp2')
Any ideas on why i'm getting this error?
Error using fit>iFit (line 235)
X, Y and WEIGHTS cannot have NaN values.
Error in fit (line 109)
[fitobj, goodness, output, convmsg] = iFit( xdatain, ydatain, fittypeobj, ...