[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
## Empty Matrix DLD question

**From**: |
Andy+Alison Adler |

**Subject**: |
Empty Matrix DLD question |

**Date**: |
Thu, 05 Nov 1998 23:04:27 -0500 |

I'd like to return an empty matrix from
an *oct file.
Initially I hoped that when cx==0
X["ridx"]= ridxX.extract( 0, cx-1);
would return an empty matrix.
No luck. x.ridx is a two element column vector.
Next, I tried
if ( cx > 0 ) {
X["ridx"]= ridxX.extract( 0, cx-1);
} else {
ColumnVector nullvec(0);
X["ridx"]= nullvec;
}
But this segfaults octave.
I couldn't find any examples of how to do this
in the source.
Is there an approved way to create empty matrices?
andy,

**Empty Matrix DLD question**,
*Andy+Alison Adler* **<=**