Index in position 2 is invalid. Array indices must be positive integers or logical values.

I have a problem. I want to do a speech command recognition,

I am trying to do this by example : https://www.mathworks.com/help/deeplearning/examples/deep-learning-speech-recognition.html

This error occurs when I try to make spectograms with my own data. I don't know what format this voice data should be. I recorded them using audacity and exported them as: Mono, 32-bit folat with a frequency of 16000 HZ each 'yes' is 1 length one second. I don't know where to change or what format the recording should be to load it. I don't know if this is a mistake in the code or badly saved sound files.

Index in position 2 is invalid. Array indices must be positive integers or logical values.

Error in speechSpectrograms (line 41)

X(:,ind,1,i) = spec;

The attachment added is the code from speechSpectrograms

[KALYAN ACHARJYA]

I didn't find any such line in the code.

[Barb]

like this? What do you mean?

X(:,ind,1,i) = spec;

[Image Analyst]

What are the values of ind and i?

The error is fully discussed in the FAQ

[Barb]

ind = 1x99 double

i =1

numHops = 98

spec =40x99 double

[Star Strider]

The ‘ind’ vector must only contan integers greater than 0 to use it as an index.

Answer 1

[Guillaume]

The error message is clear, the index in position two is invalid because it contains either non-integer values or values less than one.

The index in position two is the ind variable, so look inside that variable and see what the values are. They're going to be integer due to the way you construct ind, but if left is 0 or negative, then some ind values will indeed be invalid.

You can then work backward throught the code to find why left is less than 1. Without any of your inputs it's not something we can answer. Possible reason at first glance is that size(spec, 2) is greater than numHops.

By the way, isn't spec a vector? In which case, numel(spec) would be simpler and safer than size(spec, 2).