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

Please help me with this Matlab code error

fileTx = 'Plosives.wav';          
[fData,Fs] = audioread(fileTx);         
orig_size = size(fData);
binData = dec2bin(typecast(single(fData(:)),'uint8'),8);
txAudio = reshape((binData-'0').',1,[]).'; % Create binary stream
str = reshape(sprintf('%d',rxData(1:length(txAudio))),8,[]).';
decdata = uint8(bin2dec(str));
rxAudio = reshape(decdata,orig_size);
% Play received audio
sound (rxAudio,Fs);

[KSSV]

What are sizes of decdata,orig_size?

[dpb]

Which one fails; we aren't even told that to guess from. :(

Use debugger and see what you've done to change counts.

[thva1011 Than]

Hi, I am following this link https://www.mathworks.com/help/supportpkg/xilinxzynqbasedradio/examples/transmit-and-receive-802-11a-using-analog-devices-ad9361-ad9364.html?s_tid=answers_rc2-1_p4_MLT which sends an image file over SDR, but I am trying to send audio data then it has RESHAPE error with the rxAudio.

This is the whole adapted matlab code.

Please help!

[dpb]

Can't do anything without input; again set a breakpoint in the editor and step through the code and see where it breaks or use

dbstop if error

and then run the code and it will stop on the error at which point you can investigate.

You haven't even told us which of the several reshape lines threw the error; what are we supposed to do, purchase the Crystal Ball Toolbox?

Answer 1

[dpb]

Well, if I just make up a .wav file and try your code on it I find

[fData,Fs] = audioread('handel.wav');         
orig_size = size(fData);
binData = dec2bin(typecast(single(fData(:)),'uint8'),8);
txAudio = reshape((binData-'0').',1,[]).'; % Create binary stream
str = reshape(sprintf('%d',rxData(1:length(txAudio))),8,[]).';
decdata = uint8(bin2dec(str));
rxAudio = reshape(decdata,orig_size);
Undefined function or variable 'rxData'. 
>>

In which the data argument for the reshape in

str = reshape(sprintf('%d',rxData(1:length(txAudio))),8,[]).';

isn't defined; ergo, I'm going to guess you have a variable rxData in your workspace that isn't of the same size as was the input file you read and that's the problem.

Add

clear

to your script file and I'll bet the symptoms change.

However, don't think that will likely solve your problem entirely as when you get through with the line

binData = dec2bin(typecast(single(fData(:)),'uint8'),8);

the size of binData is going to be 32x that of fData

I've really no idea what any of the above is really intended to do but it's got some serious issues...