Keep the previous graph when you start a new measure cycle

[-Isabella-]

This code is a subvi of a bigger VI. I work with a keithely 236 and I define the start level and the stop level of the source. The source and measure arrays update in real time and are plotted in the xy graph that works as an "xy chart"

[altenbach]

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@-Isabella- wrote:

This code is a subvi of a bigger VI. I work with a keithely 236 and I define the start level and the stop level of the source. The source and measure arrays update in real time and are plotted in the xy graph that works as an "xy chart"

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If you also want to graph completed historic data, it is no longer really a "chart".  My code skeleton can be easily adopted to your requirements. Do you understand what it does?

[-Isabella-]

Thank you for the patience, but sandly i don't know how to adapt your code to mine. Could you explain that to me?

[altenbach]

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@-Isabella- wrote:

Thank you for the patience, but sandly i don't know how to adapt your code to mine. Could you explain that to me?

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There is insufficient information to give more specific help.  How do you implemented this as subVI and how it is called from the main VI? Is the data read in the caller or in the subVI? How is it called? What happens between individual measurements? Your example has no connectors assigned.

[-Isabella-]

This is my main VI and the subvi that I've showed is called Write and graph

[altenbach]

You forgot to "save for previous".