CODEWITHSUNDEEP
arraysmatlab
user2751649
user2751649

Reputation: 89

Cell array inside cell array order elements Matlab

I have a cell array containing cells like the following:

A=
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>

Each cell contains numerical values like A{1,1}=[1.6386e+03] [1589] [406.9268] [184.6770]

Given that a={'el1','el2','el3','el4'}, i would like to obtain an output B of the form:

B{1}=[a;A{1,1};A{2,1};A{3,1}...]
B{1}=
'el1'   'el2'   'el3'   'el4'
1638.60000000000    1589          406.926813049605                  184.676951989012
1665.10000000000    1614.60000000000    399.333905068047    362.462074500098
1709.60000000000    1657.80000000000    389.181059994089    529.870013181953
...

B{2}=[a;A{1,2};A{2,2};A{3,2}...]
...

How can this be performed without writing every cell(i.e. A{1,1};A{1,2}...)

Upvotes: 0

Views: 77

Answers (1)

Pursuit
Pursuit

Reputation: 12345

You can use concatenation (cat) and indexing to get this result:

%Create some inputs
A = arrayfun(@(~)num2cell(randn(1,4)),zeros(10,3), 'uniformoutput',false);
a={'el1','el2','el3','el4'};

Then to create your B{1} cell array:

%Vertically concatenate the a header with all elements in the first column of A
B{1} = cat(1, a, A{:,1})

To create all of B

for ixColumn = 1:size(A,2)   %Or, loop backwards for slightly better performance.  IE "ixColumn = (size(A,2):-1:1"
    B{ixColumn } = cat(1, a, A{:,ixColumn });
end

Upvotes: 0

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