How do I do baseline correction for spectroscopic data?

I have two arrays, one contains the intensities and is of size (a*b). Another contains my wavelengths and has a size of (a*1). I tried to use msbackadj(X, Intensities) but I keep getting the error "Error using griddedInterpolant Interpolation requires at least two sample points in each dimension." I don't understand what exactly should I do to resolve this error. Can someone suggest how I can correct it or do baseline correction in some other way? Thank you!

[Luuk van Oosten]

Could you provide more information regarding your problem? for example your wavelengths (a*1), intensities (a*b) or script that you are trying to use?