How to deal with this grpstat error message

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alpedhuez
alpedhuez 2022-5-15
评论： alpedhuez 2022-5-15
I have an error message
https://imgur.com/a/OGCDL4n
Please advise the next step.

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the cyclist
the cyclist 2022-5-15
I think you want to use "mean" instead of "average" for the summary statistic.

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Image Analyst
Image Analyst 2022-5-15
You need to have braces around the average and sum, not brackets
{"average", "sum"}
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the cyclist
the cyclist 2022-5-15
编辑：the cyclist 2022-5-15
Ran in:
It's easy to get muddled, because if you specify the input arguments as character arrays rather than strings, then you do need to use curly braces. (Notice the single quotes rather than the double quotes around the arguments.)
load patients
tbl = table(Gender,Age,Weight,Smoker);
tblstats = grpstats(tbl,{'Gender','Smoker'},{'mean','sum'},'DataVars','Weight')
tblstats = 4×5 table
Gender Smoker GroupCount mean_Weight sum_Weight __________ ______ __________ ___________ __________ Male_0 {'Male' } false 26 180.04 4681 Male_1 {'Male' } true 21 181.14 3804 Female_0 {'Female'} false 40 130.32 5213 Female_1 {'Female'} true 13 130.92 1702
alpedhuez
alpedhuez 2022-5-15
Thank you. "You specify the input arguments as character arrays rather than strings". Will you explain a bit more?

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