Re: ERROR: memory exhausted -- trying to return prompt

[Rosa Rudó Mauné]

I'm using Octaver version 2.1.42-athlonatlas with Windows XP.

In my file text, which is called "queries.mat.txt", I've got:

   -first line (information): 6042  100247  894990

    The first integer is the number of rows in the matrix, the second integer is the number of columns in the matrix and the third integer is the total of non-zeros of the matrix.

   -other lines.

    The (i+1) st line contains information about the non-zero entries of the i th row of the matrix.

    The non-zero entries of each row are specified as a sparse-separated list of pairs. Each pair contains the column number followed by the value of that paricular column.

   For example:

      queries.mat.txt could be:

      2 2 2

      1 5                                                      => (1,1) = 5

      2 4                                                      => (2,2) = 4

 

My aim is:

Saving the sparse matrix in a variable, because I'll need it, for doing operations.

 

My code is:

disp(fix(clock));
fid=fopen('queries.mat.txt');
tline=fgetl(fid);
capsalera=str2num(tline);
        n=0;
        while n <6042; 
            tline0 = fgetl(fid);
            if tline0==-1
                break;
            endif
            tline=str2num(tline0);
            n=n+1;
            matriulinea=[ones(length(tline)/2, 1) reshape(tline,2,length(tline)/2)'];
            matriusparse=sparse(matriulinea(:,1), matriulinea(:,2), matriulinea(:,3),1,100247);
            if n==1
                matriuindexos=matriusparse;
            else
                matriuindexos=[matriuindexos; matriusparse];
            endif
        endwhile
        matriuindexos=sparse(matriuindexos);
        fclose(fid);
disp(fix(clock));

 

 

Rosa Rudó Mauné

 

 

On 4/11/06, David Bateman <address@hidden> wrote:

Rosa Rudó Mauné wrote:

> Hello,
>
> I want to create a sparse matrix from a file. The file has got 100247
> lines and 6042 columns. I read it line by line and I concatenate it,
> but when reaching line 73 the program stops and gives an error. The
> mistake is:
>
> ERROR: memory exhausted -- trying to return prompt
>
> Do you know how I can solve it?
>
> Rosa Rudó Mauné

More information please... What version of octave? What is the format of
the lines of code? What is the code you are using to read the file?

D.

--
David Bateman                                address@hidden
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