07-15-2013 11:24 AM
I want to created charts using Proc SHEWHART with 2 Y axises. I want to have control chart with delta of two values say value A and value B which I will process for tests. Along with this delta I want to display value A and value B as an overlay with different scale on Y axis.
So charts will look like - X axis time scale - date / time, Y Axis 1 - Delta (Value A - Value B), Y axis 2- Plot Value A and Value B.
07-15-2013 12:50 PM
As far as I know, this can't be done in PROC SHEWHART. You would have to use PROC GPLOT to get a 2nd vertical axis.
(I suppose if you wanted to do an awful lot of work, you could get PROC SHEWHART to show a 2nd vertical axis using the ANNOTATE feature, but I have never seen that done)