Unable to perform assignment because the indices on the left side are not compatible with the size of the right side

for jk=1:1:length(pliki) 
    tak=0;
    p0=pliki(jk);
    p00=char(p0);
    pl0=(strcat(sciezka,pliki(jk)));
    tab_plikow(jk)=pl0; 
    plik0=char(pl0);

Thats the part of old code i need to change but don't know how. tab_plikow has:"appears to change size on every loop iteration, consider preallocating". Was trying with zeroes for tab_plikow but it doesn't seems to work or I'm doing something wrong. Any help would be appreciated, thanks.

[Bob Thompson]

'appears to change size on every loop iteration, consider preallocating' is just a warning message and can generally be ignored unless it slows your script down significantly. You could preallocate by putting tab_plikow = zeros(length(pliki),1) before the loop.

[Piotr Matysiak]

Ok now I have message:"Unable to perform assignment because the left and right sides have a different number of elements."

[Image Analyst]

"OK, now..." Well, we don't have your current code. Why not?

All we can say is you're trying to do what it says, for example trying to stuff 2 numbers into an index that only allows one number.

[Piotr Matysiak]

Here's the code, still I'm not sure why left and right sides have a different number of elements...

[pliki,sciezka]=uigetfile('*.wav','Otwórz plik typu *.wav');
clear tab_plikow;
lista_pl='';

if isempty(pliki)==0
cd(sciezka);
set(findobj('Tag','kodek_m'),'Enable','on');  
folder=sciezka;
set(findobj('Tag','sciezka1'),'String',sciezka);

tab_plikow = zeros(length(pliki),1);
for jk=1:1:length(pliki)  
    tak=0;
    p0=pliki(jk); 
    p00=char(p0);
    pl0=(strcat(sciezka,pliki(jk)));
    tab_plikow(jk)=pl0; 
    plik0=char(pl0);
    lista_pl=sprintf('%s',lista_pl,plik0,', ');set(findobj('Tag','lista_plikow'),'String',lista_pl);
    [y1,fs,b]=audioread(plik0);       
    lk1=size(y1);lk=lk1(2);
    plik1=sprintf('%s',sciezka_start,'\Temp\temp1.wav');
    audiowrite(y1,plik1);

[Walter Roberson]

read the answer I posted .

[Marco Soto]

I had a problem just like me, it was solved: removing the global variables.

Answer 1

[Walter Roberson]

unless sciezka is empty then the result of the strcat will be a character vector of at least two char. You try to store the two char into a single numeric location .

Use cell arrays or string objects .

[Piotr Matysiak]

I'm stuck here, can't figure it out... Could I ask for example how could it look like?

[Walter Roberson]

tab_plikow = cell(1, length(pliki))

and assign

tab_plikow{jk} = pl0;

[Piotr Matysiak]

Thank You for help, but know i have a problem with audioread and "Too many output arguments" error

[y1,fs,b]=audioread(plik0);

Earlier here was wavread I changed it for audioread like Matlab suggest but documentation says that audioread has only two output arguments, so my qouestion is: How can I use third argument?

[Image Analyst]

Why do you think there is a third "b" output? According to my R2018b help, there is no third output. You can't accept it (since there is none), and therefor cannot use it.

[Walter Roberson]

wavread() had a third output that reported the number of bits per sample, which is information that you can get from audioinfo() if you need it (which you do not for this code.)

[Piotr Matysiak]

Actually I am using third output in code.. Look here

    [y1,fs,b]=audioread(plik0);       
    lk1=size(y1);lk=lk1(2);
    plik1=sprintf('%s',sciezka_start,'\Temp\temp1.wav');
    audiowrite(y1,plik1,b);
    
    if  fs~=8000 | lk~=1 | b~=16   
    
    konw;
    k_tekst0=sprintf('%s','Parametry pliku ',plik0,' :');
    k_tekst1=sprintf('%s','Częstotliwość próbkowania: ',num2str(fs));
    k_tekst2=sprintf('%s','Ilość bitów: ',num2str(b));
    k_tekst3=sprintf('%s','Liczba kanałów: ',num2str(lk));

So how can i use audioinfo() and b output?

And second question, why tab_plikow is giving me this when i run program

    tab_plikow =

  1×10 cell array

  Columns 1 through 5

    {0×0 double}    {0×0 double}    {0×0 double}    {0×0 double}    {0×0 double}

  Columns 6 through 10

    {0×0 double}    {0×0 double}    {0×0 double}    {0×0 double}    {0×0 double}

[Walter Roberson]

The third parameter to audiowrite() is the the sample rate, fs, not the bits per sample.

info = audioinfo(plik0);
if isfield(info, 'BitsPerSample')
    b = info.BitsPerSample;
else
    b = nan;
end

Does your code still have

tab_plikow = zeros(length(pliki),1);

If it does then what does kown do ? Is it possibly a script that overwrites tab_plikow ?

Answer 2

[Image Analyst]

Try this

tab_plikow = zeros(1, length(pliki));