make array of array like array within array

Question

Muhammad Sohail Abid 2018-10-1

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/421552-make-array-of-array-like-array-within-array

评论： Muhammad Sohail Abid 2018-10-1

I want to create an array within array. I have a m*n 2D matrix of order (256,482,2) having entries as pair of points. I want to first convert oit into 2D array and then want to make array of each row like

 for N=1 to 256
NewRow=Z(N)
Append(Points,Z(N))
End for

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Muhammad Sohail Abid 2018-10-1

need help regarding code

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Answer 1

JohnGalt 2018-10-1

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/421552-make-array-of-array-like-array-within-array#answer_339180

look into the 'cat' command in matlab help

https://uk.mathworks.com/help/matlab/ref/cat.html

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Muhammad Sohail Abid 2018-10-1

在 MATLAB Online 中打开

actually this is the code in which I want to make arrays within arrays of Z here in Z I have a table of points. It has 256 rows so I want to make 256 arrays for each row within Z

 disp('y^2 = x^3 + 5376x + 2438 mod 123457')
a=0:123456;
left_side = mod(a.^2,123457);
right_side = mod(a.^3+5376*a+2438,123457);
points = [];
for i = 1:length(right_side)
I = find(left_side == right_side(i));
for j=1:length(I)
points = [points;a(i),a(I(j))];
end
end
plot(points(:,1),points(:,2),'ro')
set(gca,'XTick',0:1:123456)
set(gca,'YTick',0:1:123456)
grid on;
pad_needed = 256 - (mod(size(points,1) - 1, 256) + 1);
if pad_needed > 0
points(end+pad_needed,:) = 0;
end
T = points;
Z = reshape(T,256,482,2);
img=rgb2gray(imread('lena.jpg'));
V=img(:);
V=V';