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Following this manual page 195, I run the f = mirfeatures(a), where a is a miraudio('mysong.wav') object. Then I want to get the results stored in f. However, I get the following error after this command: f.dynamics.rms{1}

Brace indexing is not supported for variables of this type.

and the following warning after this command: f.dynamics.rms

Warning: Error updating Text.

 String scalar or character vector must have valid interpreter syntax:
RMS energy, E:\Video-Project\Watches\audio_320k_44100_1122002.wav
 
> In defaulterrorcallback (line 12)
In mirscalar/display_figure (line 390)
In mirscalar/display (line 10)

I need to mention that when I run mirrms(a). I get no warning. The mentioned commands are on the manual page 195. Also. f.dynamics.rms generates a figure.

Here is the code and the audio file:

a = miraudio('audio_320k_44100_1122002.wav');
f = mirfeatures(a);
f.dynamics.rms;
f.dynamics.rms{1};
MRM
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    Are you sure you have the relevant MATLAB version for which that manual was written and all necessary toolboxes/functions installed and available on your path? Otherwise, do contact the makes of that custom libraby, as they'll have a better idea what's going on than we do. – Adriaan Dec 15 '21 at 08:38
  • If `f.dynamics.rms{1}` gives you that error, then you're expecting it to be a cell array but it isn't. What is the value of `f.dynamics.rms`? – nekomatic Dec 15 '21 at 11:05
  • @Adriaan, the version I use is 1.81. and I am reading the manual for this version. – MRM Dec 15 '21 at 16:15
  • @nekomatic, it generates a figure. – MRM Dec 15 '21 at 16:16
  • Did you ask the authors of that software and manual? This is not a MATLAB issue, and because you provide no [mre], we cannot reproduce it. Likely scenario is that either you copied a statement wrong from the manual, or something changed in MATLAB since that manual was written. – Cris Luengo Dec 15 '21 at 16:35
  • @CrisLuengo, How can I access the authors? I will update the question. – MRM Dec 15 '21 at 18:16
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    The [toolbox's website](https://www.jyu.fi/hytk/fi/laitokset/mutku/en/research/materials/mirtoolbox) mentions author names, as well as a mailing list. Those are the avenues I'd try first. – Cris Luengo Dec 15 '21 at 18:28

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