Hi Simon,

I believe the documentation is not up-to-date with the stab/aggregate command on this.

You should remove the 'n' from the /stat option (hence it will look like this /stat="mean des") and instead add 'n' as a seperate option /n.

The whole line will the look like this:

stab age /by=sex /stat="mean des" /n

Kind regards,

Torsten Bonde Christiansen EpiData Association.

I am trying to adapt a program written for an earlier version of EpiData to version 2.2.1.171.

The command for the old version was

. stab sex /mean="age" /des="age"

which printed the following columns:

sex, N, Nage, MEAage, MINage, MEDage, MAXage

If I understand things correctly, I should be able to get the same table using the following command in the new version:

. stab age /by=sex /stat="n mean des"

However, I get a "Unknown aggregate function: N" when I try to execute the above command, even though the documentation mentions the parameter:

• n Number of observations

Also, interestingly, if I execute

. stab age /by=sex /mean

I get no error but just the table

Sex | N

M | 490 F | 3537

Instead of the mean.

Are these bugs in EpiData or do I misunderstand the documentation?

Kind regards,

Simon