Error using reshape Size arguments must be integer scalars

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mika 2014-5-26

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https://ww2.mathworks.cn/matlabcentral/answers/131183-error-using-reshape-size-arguments-must-be-integer-scalars

回答： udayakumara mg 2019-12-3

The code below give me an error message "Error using reshape Size arguments must be integer calars"

n = ending_pts;
   phi = (sqrt(5)-1)/2;
   theta = 2*pi*phi*(0:n-1);
   rho = (1:n).^phi;
   [x,y] = pol2cart(theta(:),rho(:));
   xy = 10*([x y]-min([x;y]))/(max([x;y])-min([x;y]));
   popSize = 60;
   numIter = 2e4;
   a = meshgrid(1:n);
   dmat = reshape(sqrt(sum((xy(a,:)-xy(a',:)).^2,2)),n,n);
   [optRoute,minDist] = tsp_ga(xy,dmat,popSize,numIter,1,1);

this line gives the error

dmat = reshape(sqrt(sum((xy(a,:)-xy(a',:)).^2,2)),n,n);

can any one tell me how can i resolve it please!

thanks

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mika 2014-5-26

在 MATLAB Online 中打开

hello,

>> ending_pts is a 148*2 matrice

ending_pts =

Geoff Hayes 2014-5-26

在 MATLAB Online 中打开

Hi Mika - I wasn't really expecting the above. Have you stepped through the code to see what happens once n is set to ending_pts? It appears that

theta = 2*pi*phi*(0:n-1);

is only a 1x3 vector because ending_pts(1,1) is 3. Is this what you are expecting to happen? Or, how do you expect each row in the input matrix to be handled?

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Answer 1

udayakumara mg 2019-12-3

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https://ww2.mathworks.cn/matlabcentral/answers/131183-error-using-reshape-size-arguments-must-be-integer-scalars#answer_404502

在 MATLAB Online 中打开

% APPLICATION of Zero-Crossing Rate descriptor
%% ---------------------------READING INPUT FILE----------------------------
% 'y': Audio data in the file, returned as an m-by-n matrix, where m is 
% the number of audio samples read and n is the number of audio channels in 
% the file.
% 'Fs': Sample rate, in Hz, of audio data 'y', returned as a positive scalar.
%'n_samples': Number of total samples of audio data
input_audio = 'uday.wav';
[y,Fs] = audioread(input_audio);
y = y * 2.^15;  % original values into integer
n_samples = length(y);
%% --------------------------FRAMING---------------------------------------
% Objective: to segment the audio_input data into frames of fixed length 
% 'frame_length': fixed length of the audio frame
% 'n_frames': Number of frames
% 'frames': Array that contains all frames data
%           Dimension = (frame_length, n_frames)
%           i.e. frames(67,3) : sample 67 of frame 3
frame_length = Fs/40;    % Assuming Fs is integer. 
                         % Frame length of 400 ms (for Fs = 16 kHz) 
trailing_samples = mod(n_samples, frame_length);
frames = reshape( y(1:end-trailing_samples), frame_length, []);
n_frames = length(frames(1,:));
%% -------------------------Zero-Crossing Rate-----------------------------
[ zcr ] = ZCR( y, frames, n_frames, Fs );
%% -----------------------Hamming Windowing--------------------------------
h = hamming(frame_length);
h = repmat(h,1,n_frames);
w = frames.*h;
w_reshaped = reshape(w, 1, frame_length*n_frames);
%% --------------------------PLOTING---------------------------------------
% Objective: to plot the comparative of the audio input file vs windowed
% signal
figure;
subplot(2,1,1); plot(y); ylabel('Amplitude'); title('Audio input');
subplot(2,1,2); plot(w_reshaped, '.-');
xlabel('time'); ylabel('Amplitude'); title('Windowed signal');
%% -----------------------Energy computation-------------------------------
energy = sum(w.^2);
%% --------------------------PLOTING---------------------------------------
% Objective: to plot the comparative of the audio input file vs signal energy
figure;
subplot(2,1,1); plot(y); ylabel('Amplitude'); title('Audio input');
subplot(2,1,2); plot(energy, '.-');
xlabel('time'); ylabel('Energy (J)'); title('Signal energy');

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Error using reshape Size arguments must be integer scalars

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Error using reshape Size arguments must be integer scalars

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