Re^2: Why does this work in matlab and not PDL?

Have you tried breaking it up into one multiplication at a time?

$X = $A x $B;
$X = $X x $C;
$X = $X x $D;
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That should tell you (at least) which of the multiplications PDL thinks has the wrong dimensions. Is it possible to have PDL tell you what dimensions it thinks each variable has?

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Re^3: Why does this work in matlab and not PDL? by thor (Priest) on Sep 20, 2005 at 14:47 UTC
This shouldn't be necessary. Matrix multiplication is associative, meaning that A x (B x C) == (A x B) x C, so it really shouldn't matter in which order PDL is evaluating the multiplications. However, given that there is an error at all would suggest that there's something else going on and I do agree with your approach to debugging it. :) thor `Feel the white light, the light within Be your own disciple, fan the sparks of will For all of us waiting, your kingdom will come`	[reply]

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Re^3: Why does this work in matlab and not PDL?
by thor (Priest) on Sep 20, 2005 at 14:47 UTC

shouldn't

thor

Feel the white light, the light within Be your own disciple, fan the sparks of will For all of us waiting, your kingdom will come

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