Error using reshape To RESHAPE the number of elements must not change.

Hi everyone

cananyone help me please with the following error.

I'm getting the error "Error using reshape To RESHAPE the number of elements must not change."

windows=1;
 
wwf6=zeros(winsize,round(length(cleanAudio)/winsize));

pos=zeros(round(length(cleanAudio)/winsize));
 for b=1:round(length(cleanAudio)/winsize)
        pos(1)=1;
    data1 = sig(pos(b): pos(b)+winsize-1).*(hamwin);
    wwf6(:,b) = fft(data1);
        windows = windows + 1;   
        pos(b+1) = pos(b) + winsize;
 end
wwf6;
Y = reshape(wwf6,[length(cleanAudio),1]);

[Mehmed Saad]

because you are using round, size may differ due to roundoff

[Roro]

even with changing round the issue still same, do you hav an y suggestion please?

Answer 1

[KALYAN ACHARJYA]

Must be same, see

Total Elements on wwf6=length(cleanAudio)*1

See the following example

>> A=magic(4)
A =

    16     2     3    13
     5    11    10     8
     9     7     6    12
     4    14    15     1

Total Elements in A=16, if you trying to reshape A with following, it reflects the same error, because [5,1] having 5 elements only

     >> reshape(A,[5,1])

Error using reshape

To RESHAPE the number of elements must not change.

But following have no issue, as [8,2]=16 elemnets equalt to original A

>> reshape(A,[8,2])
ans =
    16     3
     5    10
     9     6
     4    15
     2    13
    11     8
     7    12
    14     1

Hope it Helps!

Answer 2

[Ameer Hamza]

Without the actual dataset, it is difficult to predict what is going on here, but I speculate that because you used round when initializing wwf6, in the end, the vector wwf6 is not of correct shape that can be reshaped. You can truncate the last few elements like this

Y = reshape(wwf6(1:floor(numel(wwf6)/numel(cleanAudio))*numel(cleanAudio)), [numel(cleanAudio),1]);

Answer 3

[Mehmed Saad]

suppose that

winsize = 85;
cleanAudio = rand(1,25000);

Now type following in cmd

(length(cleanAudio)/winsize)
= 25000/85
= 294.1176

Round it

294

Now multiply it back with winsize, the elements will be

294*85 = 24990

So you can see that you are 10 samples short due to rounding off bcz

wwf6=zeros(winsize,round(length(cleanAudio)/winsize));

Check the size of wwf6

size(wwf6)
 = 85  294

In order to reshape it properly, do following

Y = reshape(wwf6,[winsize*round(length(cleanAudio)/winsize),1]);

But now your matrix size will be less than clearAudio

Truncate the cleanAudio to compare it with Y