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huda nawaf
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need simple example using pmode

Asked by huda nawaf
on 12 Mar 2013

hi,

*i need simple example using pmode . for example : if I have this array

x=[2 90 2 17 80; 5 3 2 90 8; 60 74 1 2 3;55 6 4 11 0];

 how i can use my two workers to sum this array, where each worker will work on part of array, the collect the result.

I don't know how i partition the array on two workers , the how to collect the results.

please , i need simple example about that.

thanks in advance*

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1 Answer

Answer by Konrad Malkowski on 13 Mar 2013

Here's an example how to use

 distributed 

arrays and how to use SPMD:

matlabpool open 2
x = 1:1:100;
y = 100:-1:1;
dx = distributed(x);
dy = distributed(y);
dz = dx + dy
spmd
dz
end

Note that dz is distributed across two workers :-).

Hope this helps

  3 Comments

Many thanks,

Can I use this code to solve complex program as sequence alignmnet ?I meam instead of sum two vectors , I use other procedure in same way.

Yes you could use this functionality in the way that you describe. You will need to check documentation for distributed/codistributed arrays to see which options are supported.

You can also do MPI like programming in MATLAB using labSend, labReceive commands, etc.

I have a matrix , say x(10*10); and I have two workers what I need is running the code for each part of matrix. I want to ask , must I write the code two times as follows, then coolect the result? what if I have 5 workers, must write the code 5 times?

matlabpool open 2
  x=dlmread()with size 10*10
  for i=1:5
  for j=1:10
  process....
  end
  end
  result=z
  for i=6:10
  for j=1:10
  process....
  end
  end
  result=z1;
    dx = distributed(z);
    dy = distributed(z1);
    dz = dx + dy
    spmd
    dz
    end

thanks in advance


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