nansum for double or single -> why error?
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hi :)
can please someone explain to me how I can use nansum for a vector? I always get this error:
Undefined function 'nansum' for input arguments of type 'single'.
same for double >> in what datatype do I have to transform the data?
Thx for ur help.
采纳的回答
Are you using a version of MATLAB anterior to 2006a? Evaluate ver or version to check. Or maybe you shadowed the function by naming a variable nansum by mistake during your tests. To check, evaluate
which nansum
and see if you get something like
C:\Program Files\MATLAB\R2015b\toolbox\stats\stats\nansum.m
3 个评论
Marco Bergamin
2015-7-28
Well, here is one way to do it:
function s = nansum( A, varargin )
A(isnan( A )) = 0 ;
s = sum( A, varargin{:} ) ;
end
更多回答（1 个）
Steven Lord
2015-7-28
Marco, since you're using release R2015a (according to your comment on Cedric's answer) you can use SUM with the appropriate nanflag input argument instead of NANSUM.
x = [1:10 NaN];
sum(x, 'omitnan')
3 个评论
Cedric
2015-7-28
I had never realized that this flag was implemented, thank you for the update!
Steven Lord
2015-7-28
Not only does SUM accept this flag, but so do a number of the other basic statistical calculation functions. For a full list, see the second item in the Mathematics section of the release R2015a Release Notes for MATLAB.
Cedric
2015-7-28
Thank you Steven! I obviously don't spend enough time reading release notes.
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