Combining 2 plots for HL

[Isabel Hostettler]

Hi all,

I am trying to combine 2 plots (attached) that show observed versus predicted value of a previously established score. First plots is the plot before and the second plot after recalibration.

* Validation

hl Indepat30d ICHgsscore_funcout_p, q(ICHgsscore) plot

* Recalibration

logistic Indepat30d ICHgsscorefunclo, coef               
hl, q(ICHgsscore) plot

I would like to overlie this two plots and have tried the following, which didnt work at all:

hl Indepat30d ICHgsscore_funcout_p, q(ICHgsscore) plot || hl, q(ICHgsscore) plot
hl Indepat30d ICHgsscore_funcout_p, q(ICHgsscore) plot [addplot hl, q[ICHgsscore] plot]

The following, which I found on the forum, gave me both graphs side by side (attached):

graph combine "Graph ICHGS for mort obs vs pred before recal, 09.05.2018.gph" "Graph ICHGS for mort obs vs pred after recal,09.05.2018.gph"

But I would like to have them overlying each other

I have read the information in "help addplot" and "help graph combine" and have read the posts in the forum but I can't make it work.

I am using stata 15.

Thanks for any help.