How can I update graph

[Dariusz Downar]

I read data from a file and get four plots in the same graph and next I
want
leave this data on the graph and update graph with the new data (for
example: I'd like to update graph with the new two plots from different
file in order to compare with four plots which I read before).

Thanks for help
Darek

[Gorka Larrea]

Attached there's a vi that will add data to a graph everytime you push a button. You can use this type of structure to achieve your goal.
Hope this helps

[mogambo]

Try this it is a sample vb code