Convert 1X5 to 3X3

Hi, I have a vector

a=[1 2 3 4 5]

, and I'd like to convert it to

A=[1 2 3; 2 3 4; 3 4 5]

. Any help would be appricated. Thank you!

Answer 1

[dpb]

Probably more clever ways, but

N=3;        % number elements to duplicate
A=a(1:N);   % first row
for i=2:numel(a)-(N-1)
  A=[A;a(i:i+N-1)];  % fixed typo of N-2 prior
end

[Chen Wang]

@dpb Thank you so much! It made sense. However, it gave me an error message "Error using vertcat Dimensions of arrays being concatenated are not consistent. A=[A;a(i:i+N-2)];"

[dpb]

Typo -- the column expression should be

A=[A;a(i:i+N-1)];

[Chen Wang]

You are awesome! Thank you so much!

[dpb]

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