Loading varied amount of plots on xy graph

[Drago1598]

Hello I have a program which measures amperage for set voltage and then saves this data as text file with 2 columns, where one is the measured amps and second is the set voltage for which the measurement was made. I want to be able to then load one or multiple (i dont know beforehand how many) files and display their contents as separate plots on one xy graph. Below i attached a sample program which can read text files, but the plots are getting connected together.

[santo_13 · Accepted solution]

The only missing implementation is that you need to keep on building an array of XY waveforms for each file you load, store in a shift register and display it on the graph.

Note - I don't recommend using the Dynamic data type, for the sake of keeping the changes minimal, I decide to leave the dynamic data type as such.

Edit - I didn't test it but if your implementation was working earlier it should continue to work for multiple files.

[Drago1598]

Thank you very much. I changed the build xy plot express vi to simple bundle, and stopped changing to dynamic data type and it still works fine.

[altenbach]

A few more comments:

• Place the plot terminal before the event structure so it properly clears, even before new plots are added. Otherwise it will display stale data from the previous run.
• Index array is resizable. Only one instance needed to get as many columns or rows you want.
• If you set the file reading to transpose=true, you don't even need to wire indices.
• You need some error handling if the file IO fails.
• etc.

Here's how it could look like (simplified).

Personally, I would use a complex 1D array for each plot. Here's how that would look like.