Concatenate a column of cells into a single array

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Corey Pew 2019-4-15

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评论： Corey Pew 2019-4-16

Hello,

I have a cell containing multiple arrays that I want to concatenate into a single array such that X{1}, X{2},... are all each a 100x1 double. I am hoping for a non looping solution that will put them all together into a single array that is 100xlength(X). I have tried using cat(), vertcat() and others but keep getting the error that 'dimensions of arrays being concatenated are not consistent.' Any help is greatly appreciated, thanks!

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Corey Pew 2019-4-16

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Update, I mistyped my format. My cell array is actually a column of cells such that:

>> X = { rand(4,1); rand(4,1); rand(4,1) }
X =
  3×1 cell array
    {4×1 double}
    {4×1 double}
    {4×1 double}

Both answers below work if you first transpose X:

>> X = X';

Thank you for the help!

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Answer 1

madhan ravi 2019-4-15

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cell2mat(X)

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Answer 2

per isakson 2019-4-15

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cat() is also a possiblity

Y = cat( 2, X{:} );

Example

>> X = { rand(4,1), rand(4,1), rand(4,1) }
X =
  1×3 cell array
    {4×1 double}    {4×1 double}    {4×1 double}
>> cat( 2, X{:} )
ans =
    0.8147    0.6324    0.9575
    0.9058    0.0975    0.9649
    0.1270    0.2785    0.1576
    0.9134    0.5469    0.9706
>> 