tapply changing order of factor levels?

The problem is in the code.

When you say

mysummary<-tapply(myfactor,mydata,length)
mysummary

you have used mydata as a factor and myfactor as  the data.

tapply has (correctly) used the ordered labels in the grouping factor
(mydata) to label its output.

If you did what you probably intended:
tapply(mydata, myfactor,length)

you'll get the order you expected.



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