Hi all,
I have 2 set of data, each of which is 31*12 (31 for number of days, and 12 for months)
Set1 = T3_All (%x-values) Set2 = Tmax_All (%y values)
Since we don't have more than 28 or 29 days for some months, the data is filled with NAN.
when i use ployfit (code below), I am getting NaN for all values. I think that is because my arrays include NaN values.
How can I get the polyfit function pass the data that contains nan, using isfinite?
Here is my code:
% Assigning arrays to data T3_All=AllT3_Import; Tmax_All=AllTmax_Import; % Determining coefficients coeff1 = polyfit(T3_All,Tmax_All,1); And the results I am getting: coeff1 = NaN NaN
P.S. I have posted this question before, although the answer provided was excellent, but it solved the problem using "mask". We are required to use "isfinite".
Many thanks
isvalid = isfinite(T3_All) & isfinite(Tmax_All); coeff1 = polyfit(T3_All(isvalid),Tmax_All(isvalid),1)
You would recognize it is a mask, if your professor doesn't like it, ask why, because the mo mask solution is slower and less visible.
ikeep = find(isfinite(T3_All) & isfinite(Tmax_All)); coeff1 = polyfit(T3_All(ikeep),Tmax_All(ikeep),1)
You have two options:
1. Use interpolation to fill the nan's and then use polyfit.
2. Remove NaN's using isnan and then fit the data.
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