Copy cells a variable number of times

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EldaEbrithil
EldaEbrithil 2020-9-2
评论： EldaEbrithil 2020-9-2
Hi all
i have this code
for i=1:length(a)
C(i)=repmat(b(i),1,a(i))
end
where b is a cell array
16x5 double
16x5 double
13x5 double
and a is an array
[101,17,1]
i want to copy the first cell 101 times, the second cell, 17 times and last cell only one time, but using the upper code i can't do that...any idea?
Thank you for the help!!
Regards
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Stephen23
Stephen23 2020-9-2
编辑：Stephen23 2020-9-2
"the cell and the matrix inside it"
That seems very unusual. So given this cell array:
C = {X,Y,Z}
you want to repmat both the cells and the matrices to get this:
{[X,X,X...X],[X,X,X,...X],...,[X,X,X,...X],[Y,Y,Y,...Y],[Y,Y,Y,...Y],...,[Y,Y,Y,...Y],[Z,Z,Z,...,Z],...,[Z,Z,Z,...Z]}
I would have expected either of these:
{X,X,...,X,Y,Y,...Y,Z,Z,...Z} % repmat the cells themselves
{[X,X,..,X],[Y,Y,...,Y],[Z,Z,...,Z]} % repmat the arrays inside the cells
EldaEbrithil
EldaEbrithil 2020-9-2
编辑：EldaEbrithil 2020-9-2
Yes in pratical terms i want something like that:
16x5 double
16x5 double
.
.(99 times)
.
16x5 double
16x5 double
.
.(15 times)
.
13x5 double

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采纳的回答

David Hill
David Hill 2020-9-2
for i=1:length(a)
C{i}=repmat(b{i},1,a(i));
end
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David Hill
David Hill 2020-9-2
count=1;
for i=1:length(a)
for k=1:a(i)
C{count}=b{i};
count=count+1;
end
end
EldaEbrithil
EldaEbrithil 2020-9-2
This is what i was looking for !!
Thank you so much David!!

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更多回答（1 个）

Steven Lord
Steven Lord 2020-9-2
To replicate the cells you can use repmat or repelem depending on whether you want ABCABCABCABC... or AAAABBBBCCCC ... In other words, how do you want the replicates to be collated? Suitable for stapling into packets or suitable for making stacks of loose handouts for students to select from piles?
X = {1:3, 4:7, [8 9]}; % A is 1:3, B is 4:7, C is [8 9]
Y1 = repmat(X, [1 2]) % ABCABC
Y2 = repelem(X, [2 3 4]) % AABBBCCCC
Or do you want to replicate the contents of the cells?
X2 = {repmat(1:3, [2 1]), repmat(4:7, [3 3]), repmat([8 9], 1, 4)}
% X2 contains a 2-by-3, a 3-by-12, and a 1-by-8

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