how to minus one graph from another

[Moony]

PLEASE help me. I'm beginner in LabView and have some difficulties.

I have, for example, 2 graphs in one window. How can I minus those 2 graphs?

Thank you in advance for help. 

[smercurio_fc]

Like your previous post, your questions are too vague. Have you tried connecting the data to a Subtract function?

How To Ask Questions The Smart Way

[Moony]

Sorry for fuzziness...

I don't imagine how to do that. Please help me.

[Dennis_Knutson]

Subtract function works with arrays or waveforms.

[Moony]

Thanks, I understand that. 

Can you send me an example? 

[Dennis_Knutson]

If you truly understand that, not sure why you would want such a simple example.

 

[Moony]

But I have to graphs in ONE window...

[Moony]

But I have 2 graphs in one window...

[_Ian_]

Well, I learned something there... did not know that feeding two waveforms into a subtraction primitive makes it pop up error terminals.

Seems a bit odd to me...

[Dennis_Knutson]

What difference does that make?

If you have an array of waveforms, simply use the Index Array function to get each one.

Extremely basic questions. Please take the LabVIEW tutorial.