Math Forum / Math Software / Scilab / July 2009

Hello,

I'm new to Scilab and just want to create a simple 3 dimensional plot
with a surface or mesh. The data that I have are points with the
coordinates x,y,z.
I would like to import them into a matrix and let Scilab do the rest
with plot3d.

I read the documentation but I couldn't figure out the correct way how
to use the plot3d function.
Below I pasted my the script that I built so far. The import of the
point data works fine.
The x,y,z coordinates are stored in the matrix  "nmatrix".

It would be awesome if someone would be willing to help!

Thanks,
Christian

function plot_it(filename)

 fid = mopen(filename, 'r');
 if (fid == -1)
   error('read_words: cannot open file for reading');
 end

counter=0;
done_yet=0;

    while (done_yet == 0)
    counter=counter+1;

   [num_read, val(1), val(2), val(3)] = mfscanf(fid, "%f %f %f");
   if (num_read <= 0)
     done_yet = 1;
   else

     nmatrix(counter,1:3)=[val(1) val(2) val(3)];
     mprintf("%f %f %f \n",nmatrix(counter,1:3));
   end

    end

mclose(fid);

//===================
// how can I make the 3d plot in this part of the script???
//===================

endfunction