>>I don't know a native command. I could probably write you a func... if you ever need it. I was reading somewhere that fox is quite good for developing mathematical functions (amongst other things) etc
>
>OK, thanks.

Couldn't resist the challenge...

FUNCTION MyStDev
LPARAMETERS tcfieldName, tcAlias
LOCAL lnReccount, lnSum, lnSquare
LOCAL lcTalk

lcTalk = SET( "TALK")
SET TALK OFF

lnReccount = RECCOUNT( tcAlias)

CALCULATE SUM( EVALUATE( tcFieldName)) TO lnSum

CALCULATE SUM( EVALUATE( tcFieldName)^2) TO lnSquare

SET TALK &lcTalk

RETURN SQRT((( lnReccount*lnSquare) - ( lnSum^2))/ (lnReccount*(lnReccount-1)))