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From: ratnesh kumar on 27 Jan 2010 04:11
hi,
i have numbers like 1 2 3 4 5
motive is to make matrix like

1 2
1 3
1 4
1 5
1 2 3
1 2 4
1 2 5
1 3 4
1 3 5
1 4 5 %then
1 2 4 5

these 12345 is maybe any numbers suppose
21 45 67 33 22.number of elements is 5 it may vary to any length

21 45
21 67
21 33
21 22
21 45 67
21 45 33
21 45 22
21 67 33
21 67 22
21 33 22
21 45 33 22
From: Walter Roberson on 27 Jan 2010 10:07
ratnesh kumar wrote:

> i have numbers like 1 2 3 4 5
> motive is to make matrix like
>
> 1 2
> 1 3
> 1 4
> 1 5
> 1 2 3
> 1 2 4
> 1 2 5
> 1 3 4
> 1 3 5
> 1 4 5 %then
> 1 2 4 5


Matlab does not permit matrices to have varying number of elements
across the rows. You will have to use a cell array instead of a numeric
matrix.
From: ratnesh kumar on 27 Jan 2010 12:45
Walter Roberson <roberson(a)hushmail.com> wrote in message <hjpkqn$jia$1(a)canopus.cc.umanitoba.ca>...
> ratnesh kumar wrote:
>
> > i have numbers like 1 2 3 4 5
> > motive is to make matrix like
> >
> > 1 2
> > 1 3
> > 1 4
> > 1 5
> > 1 2 3
> > 1 2 4
> > 1 2 5
> > 1 3 4
> > 1 3 5
> > 1 4 5 %then
> > 1 2 4 5
>
>
> Matlab does not permit matrices to have varying number of elements
> across the rows. You will have to use a cell array instead of a numeric
> matrix.
hi,
thanks if i will do one matrix contains two column another contains three column and same for the rest.the there will be the possibility numbers having all possibilities with one element.
From: Nathan on 27 Jan 2010 16:47
On Jan 27, 9:45 am, "ratnesh kumar" <iam_ratn...(a)yahoo.co.in> wrote:
> Walter Roberson <rober...(a)hushmail.com> wrote in message <hjpkqn$ji...(a)canopus.cc.umanitoba.ca>...
> > ratnesh kumar wrote:
>
> > > i have numbers like 1 2 3 4 5
> > > motive is to make matrix like
>
> > > 1 2
> > > 1 3
> > > 1 4
> > > 1 5
> > > 1 2 3
> > > 1 2 4
> > > 1 2 5
> > > 1 3 4
> > > 1 3 5
> > > 1 4 5 %then
> > > 1 2 4 5
>
> > Matlab does not permit matrices to have varying number of elements
> > across the rows. You will have to use a cell array instead of a numeric
> > matrix.
>
> hi,
> thanks if i will do one matrix contains two column another contains three column and  same for the rest.the there will be the possibility numbers having all possibilities with one element.

doc nchoosek

That should be a starting point for you.

-Nathan
From: ratnesh kumar on 3 Feb 2010 14:59
hi,
thanks for giving me suggestions.but nchoose create problem when their is large string.it is slow also.for S=[S3(1:15)] this is ok but when iam using S=[S1,S2,S3]
matlab gives problem of "out of memory".

iam using these code same problem occured
S1 =[3 20 21 22 23 25 26 27 28 29 30 62 66 69 71 72 74 75 77 80 82 83 84 85 86 89];
S2=[90 92 96 99 101 103 105 107 111 114 115 116 117 118 119 124 125 127 129 131 137 141 144 24 67 68];
S3=[70 87 88 95 98 100 104 110 112 121 134];
%for
S=[S3(1:5)] %%%*******change


N = numel(S);
S = S(:).' ; % make the set a row vector, for uniform output
p2=2.^(N-1:-1:0); % This part of the formula can be taken out of the loop
nm=(2^(N-1))
for i=1:nm,
W{i}= S(bitget((2*i-1)*p2,N) > 0) ;
end
celldisp(W)


provide me solution
thanks
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