how to minus one graph from another

[_Ian_]

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@Moony wrote:

But I have 2 graphs in one window...

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Do you mean 2 graphs on one front panel?

Or two plots on one graph?

If you mean the 2nd one you can still access the data for the different plots and subtract as necessary.

[Moony]

Thank you lan for your patience. You are very kind and genius...

Thanks sooooo much.

I know, some people are masters in Labview, but it doesn't mean that they must insult beginners. I've just learned Labview for a 14 days. But this problem I must solve in 2-3 days. So I have no much time and I decide to look for help here...  

[_Ian_]

Don't feel insulted!

Remember that everyone here is volunteering their time to help. Much of the time, if a reply comes across as being a bit 'blunt' think of it as the poster just saving a bit of their own time... the more time they save, the more other people they can help.

That said, smercurio makes a good point.... take the time to carefully formulate your questions, and give plenty of information about what you are trying to achieve. A few minutes extra spent forming a question could save a lot more time explaining it later and also makes people more willing to go the extra mile when you really need it.

I have found that 99% of the time I don't even need to ask a question as someone has asked it already and some careful searching will find the answer.

[Dennis_Knutson]

Well, it's pretty insulting to us experienced users when you say you don't have the time to take a tutorial and instead ask time from all us volunteers. Two weeks is plenty of time to take the tutorial.

[Moony]

I didn't mean that I have no time, instead you have...

I've meant that for you will be easy to answer the questions that are basic for you...

Sorry, I don't disturb you any more...

Good luck to you. 

[Moony]

Lan, thank you... Your advices are very helpful. I'll work hard...