Expression help

[yvonne-c]

Hi

I have the following expression in a chart, which works fine

=round([Last calving]-[Date of birth])/30.4

I want to add the following selection to the expression but cant get it right

{<[Lact. no.]={1}>}

I have tried this:

=round({<[Lact. no.]={1}>}[Last calving]-[Date of birth])/30.4

Can anyone advise what I'm doing wrong?

Thanks

[sunny_talwar · Accepted solution]

Try this:

=Round(Only({<[Lact. no.]={1}>} [Last calving]-[Date of birth]))/30.4

[yvonne-c]

Thanks Sunny, that works perfectly