Change negative values in data

Hello,

I have made a variable to show when my data is negative and to write NaN but I need it to show that on the original data. Any tips on how I can do this?

invalidDataIndex=[windTurbineData.mean_Power_kW<0]==1

for a = find(invalidDataIndex == 1)

a(invalidDataIndex) = NaN

end

Answer 1

[dpb]

You're almost there, but making it more complicated than needs be...

invalidDataIndex=(windTurbineData.mean_Power_kW<0);         % the result is logical array already
windTurbineData.mean_Power_kW(invalidDataIndex) = NaN;      % use logical indexing

Of course, you don't even need the temporary index at all, just a logical indexing expression...

windTurbineData.mean_Power_kW(windTurbineData.mean_Power_kW<0) = NaN;      % use logical indexing

[PureFleet]

Thank you!