twoway bar stacked bars?

[Gerald Gjini]

I am using "twoway bar pass mdate, barw(0.75) || rbar pass watch mdate, barw(0.75) || rbar watch specialmention mdate, barw(0.75) || rbar specialmention substandard mdate, barw(0.75)"

to stack several bars I am using the twoway vs bar command due to the need to add a connected line in the graph as well, but for some reason the bars are not being stacked...a little lost in here

[Nick Cox]

twoway rbar low high date (e.g.) just draws bars from low to high; it doesn't do arithmetic to add any of the variables mentioned to any other variables mentioned in other commands.

Suppose a, b and c are all zero or positive and you want to stack their cumulative sums. You could start with bars for a, but you also need to calculate

 
gen B = a + b 
gen C = a + b + c 
twoway bar a date || rbar a B date || rbar B C date

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[Gerald Gjini]

Thank you Nick. will do.