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drIsWaveform Function

Driss

Hello,

I am trying to find out if the evaluation of a expression is a waveform or a scalar type.

For example:

  myExpression = "dB20(VF(\"/sig_out\"))"

  eval = car(errsetstring(myExpression))

I would like to have a function that returns t or nil depending on whether eval is a waveform or a scalar. 

I read from the following post, that the drIsWaveform should do exactly what I want:

  www.designers-guide.org/.../YaBB.pl



However unlike in this post, the evaluation of my expression returns: srrWave: =XXX instead drwave=XXX

so that  drIsWavefirm(eval) returns the wrong value (nil in this case)

My question:

1) Why do I get a srrWaveform instead of a drWaveform?

2) What is the difference between both types?

3) is there any documentation related to the different data structures used in ADE? 

Many Thanks for your help.

Driss

Parents
  • Dear Andrew,
    Thank you very much for the quick answer. Indeed the expression was "stored" in a waveform Family and using famIsFamily solved my problem.

    I still face now another issue with the evaluation of user expressions combinations.
    For example these 3 expressions are evaluable with the calculator:
    myExpr1 = "db20(VF(\ "sig_out\ "))"
    myExpr2 = "db20(VF(\ "sig_in\ "))"
    myExpr3 = "myExpr1 / myExpr2"

    Still opening the psf directory with openResults(psf_dir_path), neither evalstring() or errsetstring() function works in the third case.
    Is there a simple way to evaluate expression combination as the calculator does? Would you have any suggestion?
    Thanks again for your help.
    Best Regards
Reply
  • Dear Andrew,
    Thank you very much for the quick answer. Indeed the expression was "stored" in a waveform Family and using famIsFamily solved my problem.

    I still face now another issue with the evaluation of user expressions combinations.
    For example these 3 expressions are evaluable with the calculator:
    myExpr1 = "db20(VF(\ "sig_out\ "))"
    myExpr2 = "db20(VF(\ "sig_in\ "))"
    myExpr3 = "myExpr1 / myExpr2"

    Still opening the psf directory with openResults(psf_dir_path), neither evalstring() or errsetstring() function works in the third case.
    Is there a simple way to evaluate expression combination as the calculator does? Would you have any suggestion?
    Thanks again for your help.
    Best Regards
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