Wave dependency in user-defined functions

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I try to use wave dependency in my function so that when Wave1 is changed, Wave2 will be updated automatically.

Function Dependency_test1()
    make /O/N=5 wave1
    wave1={1,2,3,4,5}
    make /O /N=5 wave2
    wave2:=wave1
End


but always get an error "Can't use local variables in dependency formula" during compile.

This seems to work in the command line. I am not sure what I am doing wrong?

Thank you!
This appears to work:
Function Dependency_test1()
    make /O/N=5 wave1
    wave1={1,2,3,4,5}
    make /O /N=5 wave2
    SetFormula wave2,  "wave1"
End


When I use Edit  root:wave1,root:wave2 I can change values in wave1 and those in wave2 change automagically.

Hope this helps,
Kurt

July 7, 2017 at 02:41 am - Permalink

To be fully safe with liberal names and data folders, you need to do something like this:
Function Dependency_test1()

// stupid example to make this point...
    String wname = "liberal name for my wave"
    make /O/N=5 $wname
    WAVE wave1 = $wname
    wave1={1,2,3,4,5}
   
// now create the dependency
    make /O /N=5 wave2
    String wave1name = GetWavesDataFolder(wave1, 2)
    SetFormula wave2, wave1name
End

If you now run this function, then go to Misc->Object Status you will see that wave2 depends on wave1 via this formula: "root:'liberal name for my wave'". Note the data folder path, and special quoting for the liberal name.

John Weeks
WaveMetrics, Inc.
support@wavemetrics.com

July 7, 2017 at 09:56 am - Permalink