Thread Subject: Creating a large Matrix

Hi,

I want to create a matrix of dimensions m x n with m = 2000
and n = 4000. How can i do it without having to write whole
of it manually. Please help me out with this.

"Muhammad Rana" <ehsanrana@gmail.com> wrote in message
<g5jfai$osg$1@fred.mathworks.com>...
> Hi,
>
> I want to create a matrix of dimensions m x n with m = 2000
> and n = 4000. How can i do it without having to write whole
> of it manually. Please help me out with this.

Insufficient information to suggest much
more than

  rand(2000,4000)

There are many ways to build a matrix.

John

"Muhammad Rana" <ehsanrana@gmail.com> wrote in message
<g5jfai$osg$1@fred.mathworks.com>...
> Hi,
>
> I want to create a matrix of dimensions m x n with m = 2000
> and n = 4000. How can i do it without having to write whole
> of it manually. Please help me out with this.

What do you want in your matrix?
see:

ones
zeros
gallery

Hi,
well basically i want to generate a Parity check matrix H of
zeros and ones with N = 4000 and K = 2000.

I have looked in the help but cannot find the command to
generate such a matrix.

"Matt Fig" <spamanon@yahoo.com> wrote in message
<g5jfta$8ph$1@fred.mathworks.com>...
> "Muhammad Rana" <ehsanrana@gmail.com> wrote in message
> <g5jfai$osg$1@fred.mathworks.com>...
> > Hi,
> >
> > I want to create a matrix of dimensions m x n with m = 2000
> > and n = 4000. How can i do it without having to write whole
> > of it manually. Please help me out with this.
>
> What do you want in your matrix?
> see:
>
> ones
> zeros
> gallery
>
Hi,

well i basically want to generate a Parity Check matrix H of
zeros and ones with order (N-K,N) , where N-K = M = 2000 and
N = 4000.

It's still not really clear if you want a specific order to the ones and zeroes in your matrix.

If you don't, this should do the trick:
round(rand(2000,4000))

Teg Veece <103529100@student.ucc.ie> wrote in message
<18271575.1216183663664.JavaMail.jakarta@nitrogen.mathforum.org>...
> It's still not really clear if you want a specific order
to the ones and zeroes in your matrix.
>
> If you don't, this should do the trick:
> round(rand(2000,4000))

Yea I want a specific order for ones and zeros in my matrix.
The column weight should be 3 and the row weight should be 3
as well.

So basically the matrix is of 2000 rows and 4000 columns
with row weight and column weight of 3

"Muhammad Rana" <ehsanrana@gmail.com> wrote in message
<g69tk8$910$1@fred.mathworks.com>...
> Teg Veece <103529100@student.ucc.ie> wrote in message
>
<18271575.1216183663664.JavaMail.jakarta@nitrogen.mathforum.org>...
> > It's still not really clear if you want a specific order
> to the ones and zeroes in your matrix.
> >
> > If you don't, this should do the trick:
> > round(rand(2000,4000))
>
> Yea I want a specific order for ones and zeros in my matrix.
> The column weight should be 3 and the row weight should be 3
> as well.
>
> So basically the matrix is of 2000 rows and 4000 columns
> with row weight and column weight of 3

If you want to get some help, you'll need to explain exactly
how your matrix is built.

is there an algorithm that determines whether each element
is 0 or 1? if yes, what is it?

if no, do you have the data that you have to introduce in
some file??

"Gavrilo Bozovic" <gavrilo.bozovic@helbling.ch> wrote in
message <g69ugd$m4m$1@fred.mathworks.com>...
> "Muhammad Rana" <ehsanrana@gmail.com> wrote in message
> <g69tk8$910$1@fred.mathworks.com>...
> > Teg Veece <103529100@student.ucc.ie> wrote in message
> >
>
<18271575.1216183663664.JavaMail.jakarta@nitrogen.mathforum.org>...
> > > It's still not really clear if you want a specific order
> > to the ones and zeroes in your matrix.
> > >
> > > If you don't, this should do the trick:
> > > round(rand(2000,4000))
> >
> > Yea I want a specific order for ones and zeros in my matrix.
> > The column weight should be 3 and the row weight should be 3
> > as well.
> >
> > So basically the matrix is of 2000 rows and 4000 columns
> > with row weight and column weight of 3
>
> If you want to get some help, you'll need to explain exactly
> how your matrix is built.
>
> is there an algorithm that determines whether each element
> is 0 or 1? if yes, what is it?
>
> if no, do you have the data that you have to introduce in
> some file??

Basically, the matrix i want to build is a sparse parity
check matrix H with M = 2000 and N = 4000. The dimensions of
my parity check matrix say H1 should be M x K, where K = N-M.

I hope you can find a solution to my problem.
Thanks
There is no specific algorithm for this matrix, but the
column weight and row weights are 3, which means it is a
regular parity check matrix.

"Muhammad Rana" <ehsanrana@gmail.com> wrote in message
<g5jfai$osg$1@fred.mathworks.com>...
> Hi,
>
> I want to create a matrix of dimensions m x n with m = 2000
> and n = 4000. How can i do it without having to write whole
> of it manually. Please help me out with this.

Insufficient information to suggest much
more than

  rand(2000,4000)

There are many ways to build a matrix.

John

"Muhammad Rana" <ehsanrana@gmail.com> wrote in message
<g5jfai$osg$1@fred.mathworks.com>...
> Hi,
>
> I want to create a matrix of dimensions m x n with m = 2000
> and n = 4000. How can i do it without having to write whole
> of it manually. Please help me out with this.

What do you want in your matrix?
see:

ones
zeros
gallery

Hi,
well basically i want to generate a Parity check matrix H of
zeros and ones with N = 4000 and K = 2000.

I have looked in the help but cannot find the command to
generate such a matrix.

"Matt Fig" <spamanon@yahoo.com> wrote in message
<g5jfta$8ph$1@fred.mathworks.com>...
> "Muhammad Rana" <ehsanrana@gmail.com> wrote in message
> <g5jfai$osg$1@fred.mathworks.com>...
> > Hi,
> >
> > I want to create a matrix of dimensions m x n with m = 2000
> > and n = 4000. How can i do it without having to write whole
> > of it manually. Please help me out with this.
>
> What do you want in your matrix?
> see:
>
> ones
> zeros
> gallery
>
Hi,

well i basically want to generate a Parity Check matrix H of
zeros and ones with order (N-K,N) , where N-K = M = 2000 and
N = 4000.

It's still not really clear if you want a specific order to the ones and zeroes in your matrix.

If you don't, this should do the trick:
round(rand(2000,4000))

Teg Veece <103529100@student.ucc.ie> wrote in message
<18271575.1216183663664.JavaMail.jakarta@nitrogen.mathforum.org>...
> It's still not really clear if you want a specific order
to the ones and zeroes in your matrix.
>
> If you don't, this should do the trick:
> round(rand(2000,4000))

Yea I want a specific order for ones and zeros in my matrix.
The column weight should be 3 and the row weight should be 3
as well.

So basically the matrix is of 2000 rows and 4000 columns
with row weight and column weight of 3

"Muhammad Rana" <ehsanrana@gmail.com> wrote in message
<g69tk8$910$1@fred.mathworks.com>...
> Teg Veece <103529100@student.ucc.ie> wrote in message
>
<18271575.1216183663664.JavaMail.jakarta@nitrogen.mathforum.org>...
> > It's still not really clear if you want a specific order
> to the ones and zeroes in your matrix.
> >
> > If you don't, this should do the trick:
> > round(rand(2000,4000))
>
> Yea I want a specific order for ones and zeros in my matrix.
> The column weight should be 3 and the row weight should be 3
> as well.
>
> So basically the matrix is of 2000 rows and 4000 columns
> with row weight and column weight of 3

If you want to get some help, you'll need to explain exactly
how your matrix is built.

is there an algorithm that determines whether each element
is 0 or 1? if yes, what is it?

if no, do you have the data that you have to introduce in
some file??

"Gavrilo Bozovic" <gavrilo.bozovic@helbling.ch> wrote in
message <g69ugd$m4m$1@fred.mathworks.com>...
> "Muhammad Rana" <ehsanrana@gmail.com> wrote in message
> <g69tk8$910$1@fred.mathworks.com>...
> > Teg Veece <103529100@student.ucc.ie> wrote in message
> >
>
<18271575.1216183663664.JavaMail.jakarta@nitrogen.mathforum.org>...
> > > It's still not really clear if you want a specific order
> > to the ones and zeroes in your matrix.
> > >
> > > If you don't, this should do the trick:
> > > round(rand(2000,4000))
> >
> > Yea I want a specific order for ones and zeros in my matrix.
> > The column weight should be 3 and the row weight should be 3
> > as well.
> >
> > So basically the matrix is of 2000 rows and 4000 columns
> > with row weight and column weight of 3
>
> If you want to get some help, you'll need to explain exactly
> how your matrix is built.
>
> is there an algorithm that determines whether each element
> is 0 or 1? if yes, what is it?
>
> if no, do you have the data that you have to introduce in
> some file??

Basically, the matrix i want to build is a sparse parity
check matrix H with M = 2000 and N = 4000. The dimensions of
my parity check matrix say H1 should be M x K, where K = N-M.

I hope you can find a solution to my problem.
Thanks
There is no specific algorithm for this matrix, but the
column weight and row weights are 3, which means it is a
regular parity check matrix.