Writing m*n matrix into single array

2017 11 3
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更新时间：2017 11 5
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I want to write m*n matrix into single array

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dpb
dpb 2017-11-3
Say what? An matrix is an array ...
If you want to recast 2D as 1D then there's either reshape or the Matlab idiom using the : operator--
x=x(:); % column vector
will turn any dimension of an array/matrix into a (column) vector. If you want row, then just transpose the result--
x=x(:).'; % row vector
Abdul Gaffar
Abdul Gaffar 2017-11-3
编辑：Walter Roberson 2017-11-3
Consider A=[1,1,2;4,3,2;2,3,4]
Now when i use A=A(:), I am getting A=[1,4,2,1,3,3,2,2,4] which is not equal to original A(3*3) matrix
Walter Roberson
Walter Roberson 2017-11-3
Yes? You can reshape(A,3,3) to get back the original ?
We do not understand what you are starting with and what you need to end up with ??
dpb
dpb 2017-11-4
编辑：dpb 2017-11-5
All the elements of A(:) are identical to those in the original A; only the shape was changed. The expansion to vector is in column-major order; that is each column is in turn appended to the preceding. This is internal Matlab storage order and an extremely important concept in learning to use the vector facilities within Matlab.
All that occurs is, as Walter notes, a reordering of the apparent shape such that matrix operations can be performed on the matrix according to the laws of matrix algebra or elemental operations on conformant arrays.

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Walter Roberson
Walter Roberson 2017-11-3

0 个投票

YourMatrix(:)
would give a column vector containing the same elements, if that is what you want ?

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dpb
dpb
2017-11-5

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