Expected nsemitones to be one of these types: single, double

To change the pitch I am uaing a spinner. However, I am getting this.

Expected nsemitones to be one of these types:

single, 

[Rik]

It looks like that refers to the object, not its value.

What class is nsemitones?

[Rezaul Reza]

well, i dont know what you are referring to, however when i do the exact thing from command line it works.

When I try to do the following I am getting different error

[Voss]

Try:

nsemitones = app.PitchSpinner.Value;

[Rezaul Reza]

How could I miss that.. damn..

yeah Benjamin that was my silly mistake

[Cris LaPierre]

It doesn't look like you are using a spinner to me.

[Rezaul Reza]

Hi Criss,

I tried to assign pitchSPinner to the as value instead off querying the field. It's solved .

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If I had the capacity to give an award, I would have gave it to you.

Real star

[Rik]

That was indeed what I meant. Benjamin, do you want to post the solution as the answer, or shall I? Then Rezaul can mark it as accepted answer.

[Voss]

Rik, go for it. You had the solution first, I merely restated it.

Answer 1

[Rik]

The reason this code works when you use input (with str2double) is that you have a number.

The code you posted uses the handle to the spinner, meaning you're trying to use the entire object. That doesn't just contain your chosen value but also many other properties (like the position etc).

If you use app.PitchSpinner.Value instead, that will retrieve the actual value. If you use that, your code should work again.

For the next time: if you use the debugger, you can step through your code line by line and have a look at the variables you have in your workspace. If you store app.PitchSpinner in a separate variable, you will see (e.g. by using class(app.PitchSpinner)) that the class of your variable is an object, not a number.