Error: Graph_x is not a memory graph

[Meng JI]

Hi everyone,

I have a question about combine graphs in stata.

I have two figures, say Figure1 and Figure2. And when I was trying to combine them together in stata, I used command graph combine Figure1 Figure2, r(2).

However, stata popped up an error saying that Figure2 is not a memory graph. I checked the directory and I've saved them there. I can also open the gph files one by one in stata but just can't use the command. Sometimes the warning would be Figure1 is not a memory graph.

I wonder if anyone of you has encountered anything like this before. It would be great if you can give me some suggestions for the possible reasons.

Thank you very much!

[Raymond Zhang]

You should use

graph combine "figure1" "figure2"

or

graph combine figure1.gph figure2.gph

[Raymond Zhang]

Also you can use the option "name()" when you plot the graph.for example

sysuse auto,clear
scatter price mpg,name(figure1)
scatter price weight,name(figure2)
graph combine figure1 figure2

[Meng JI]

You should use

graph combine "figure1" "figure2"

or

graph combine figure1.gph figure2.gph

Hi Raymond,

Thank you so much for your reply. I tried the code with .gph and it works now. However, I'm still very confused because I've combined other figures without .gph and they work very well. Do you have any idea about the possible reasons why I can't use the same code for these two figures.

Thanks a lot!

[Raymond Zhang]

If you use graph save,and then use graph combine,the you should use .gph or "figure".If you use name() option,then you need not code with .gph.
You can give an example to show the question.

[Meng JI]

If you use graph save,and then use graph combine,the you should use .gph or "figure".If you use name() option,then you need not code with .gph.
You can give an example to show the question.

Hi Raymond,

I see. It may have something to do with the way I save the graphs in the first place. Both of the methods you mentioned solved my problem.

Thanks a lot!