Problems translating .m to .oct

[John W. Eaton]

On  5-Mar-2004, Al Niessner <address@hidden> wrote:

| I am translating a working 'm' file into a compiled version and cannot
| figure out how to multiply two ColumnVectors element wise. Here is an
| example of the octave syntax (m file) and reduced C++ code:
| 
|  m-file                              C++
|  ------                              ---
| a = someMatrix(:,1);        ColumnVector a(someMatrix.column(0));
| b = someMatrix(:,2);        ColumnVector b(someMatrix.column(1));
| c = someMatrix(:,3);        ColumnVector c(someMatrix.column(2));
|                             ColumnVector d;
| d = a .* (b + c);           d = a * (b + c);
| 
| I then get the ambiguous operator "*" error where it can find
| RowVector, ColumnVector -> double
| ColumnVector, RowVector -> Matrix
| octave_value, octave_value -> octave_value
| 
| So, what is the correct C++ syntax for this operation? Should I be using
| the last and then extracting the column vector from it?

I think you want

  ColumnVector d = product (a, b+c);

jwe



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