st: Error-bars---again

[moleps islon <moleps2@gmail.com>]

Dear listers,
Looking at the number of postings requesting an option of adding
error-bars with ci,sd or se to bar graphs I'm sure one exists but I
still havent found an ado handling this. Is there one?

Or is there a way to do ci(b)plot over multiple categories?

ie. something akin to graph bar x, over(z) over(y)


Regards

Moleps
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