Add overwrite option to graph.merge

[mamo]

Dear Eviews team,

creating a graph with the program line

Code: Select all

graphm.merge graph1 graph2 graph2

creates an error if the object graphm already exists.
As it is already the case in with the freeze command, it would be convenient to have an option mode=overwritealso in the merge command, or, shorter, sth. like graphm.merge(o).

Best, mamo