On 15.10.2009, at 17:51, John Caron wrote:
The most efficient thing to use is this method on the Array class:
public java.lang.Object get1DJavaArray(java.lang.Class wantType);
this will give back the java primitive array, without copying if
possible. So if you have a double Array:
double[] ja = (double []) ma.get1DJavaArray( double.class);
you then have to see if your chosen algebra package has a
constructor that can wrap the java array without copying it. You
will need the shape information:
int[] shape = ma.getShape();
Good luck, and drop me a note if you find out anything useful to
others with the same problem.
Thanks! This should at least be efficient. I quickly checked the Colt
implementation, which does have a constructor for its array class that
takes the plain Java array plus the shape information, so at least in
theory this should be simple. If/when I get it to work, I'll post my
solution here.
On 15.10.2009, at 18:15, Doug Lindholm wrote:
You might also look at Apache Commons Math:
http://commons.apache.org/math/
That looks like an interesting library as well, but its linear algebra
routines use Java-style 2D arrays, so it's not a good match for my
purposes.
Thanks to both of you for your suggestions!
Konrad.
