Ignoring NaNs for polyfit

I'm trying to fit a line for a linear regression but I keep getting NaNs when using polyfit. I attached the data and the matlab files.

Answer 1

[David Goodmanson]

Hello TimaMarie,

yes, polyfit doesn't like NaNs. One way out is, just before doing polyfit, toss out the elements of both variables if either one of them is a NaN:

ind = isnan(con_WABA) | isnan(WAchl);
con_WABA(ind) = [];
WAchl(ind) = [];

[TinaMarie Haskell]

Thank you so much!