grpstats with nan values

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Leah 2012-12-12

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https://ww2.mathworks.cn/matlabcentral/answers/56453-grpstats-with-nan-values

编辑： Giuseppe 2015-11-27

so I thought you use nanmean and nansum to ignore nans with grpstats, but it seems that it always ignores them. I want a nan to be returned if there is a nan value present in the grouping. I can only get it work if all the values are nan and you are using mean. I tried to write an anonymous function, but the values are filtered out in the groupstat function before the anonymous function is called. Does anyone have any experience with this? Is it a bug? I'm in version 2010b

    d=dataset({[1; 1; 1; 2; 2; 2],'id'},{rand(6,1),'value'})
    d.value(1)=nan()
    grpstats(d,'id',{'mean' 'sum'})
    d.value(1:3)=nan()
    grpstats(d,'id',{'mean' 'sum'})