overlaid graphs

[Eva M]

I am currently using a VI with waveform graph to get current vs voltage graph. I would like to see the graphs overlaid so I can see the effects of appling voltages on the collected current. I tried to replace the waveform graph with waveform chart to get overlaid plots, but I don't think it's correct. On the waveform chart, there is no input for the y componet of the chart. I am attaching the two VIs that I am using. Can anyone help me with this question?

[JRA]

Could you let us know what type of instrument you have? I tried running the VIs, but LabVIEW is search for "Keithley 24xx Buffer Read.vi" but can not find it. I tried to find an instrument driver, but I'm not sure about which instrument you have. Let us know and I'll try this out.

[Eva M]

hi JRA,
I am using keithley 2400 source meter to sweept voltage.Keithley 24xx vi can be found in the www.keithley.com . I could not attach the file (too large to load on my slow connection). Thank you for trying to help.
Eva