Hi all,

I have been trying to draw a bland -altman difference plot

Code:
Code:
 batplot systolicdifference gestationweek, title(Difference in systolic blood pressure per week ) notrend xlab(16(2)43) moptions(mlabp(9))
To clarify further the variable
Code:
systolic
already includes the difference ( y-axis) and the
Code:
gesationweek
is on the x-axis as I am looking for the difference per gestation week but some reason the code is not working.

Any assistance will be greatly appreciated.