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Create wave name from a variable

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Mantis August 24, 2012 - 06:34
Posts: 2
 Joined: 2012-08-24
 Location: Switzerland

Very easy problem for you! I tried to find the answer everywhere I could but it still wrong...

I want to call a wave name somewhere in my program like this:

Function test (x)
 
Variable x
 
Wave wavename+x
 
end

And if I write "test (12)", I want to call the wave "wavename12"...i'me sure it's very easy, but I tried with "num2str" and everything like this but there's no way to work....

Thanks for your answer!

Marc
chozo August 24, 2012 - 07:31
Posts: 91
 Joined: 2010-05-14
 Location: Germany

Do it like this:

Function test (x)
Variable x
Wave mywave = $("wavename"+num2str(x))
... // do something with mywave
End
thomas_braun August 24, 2012 - 07:33
Posts: 95
 Joined: 2009-10-07
 Location: Germany

Hi,

checkout

DisplayHelpTopic "Converting a String into a Reference Using $"

The syntax is basically

Function myFunction(str)
string str
 
wave wv = $str // reads the name of the wave from the *contents* of str
wave wvv = $"myWave"
wave wvv = $("myWave" + "mySuffix")
End
johnweeks
 August 24, 2012 - 08:15
Posts: 859
 Joined: 2007-06-29
 Location: United States

In addition to the documentation referenced by thomas_braun, you should check these out:

DisplayHelpTopic "Accessing Waves In Functions"
DisplayHelpTopic "Accessing Global Variables And Waves"
DisplayHelpTopic "Wave References"

In case you are unfamiliar with DisplayHelpTopic, all you need to do is copy the command line, paste it into Igor's command line and press Enter.

The first discusses various direct solutions to your problem; the others are more general.

John Weeks
WaveMetrics, Inc.
support@wavemetrics.com
Mantis August 25, 2012 - 00:02
Posts: 2
 Joined: 2012-08-24
 Location: Switzerland

Thanks a lot for all your answers!

I thought so it was something with references but can't deal with it!

Thanks!
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