Re: [ojAlgo-user] Strange matrix multiplication problem

[Anders P. <an...@op...>]

Can you send me code that reproduce the problem?

You have to "copy" the history of the matrices you use in that  
multiplication. It matters how the they were created.

/Anders

On 10 dec 2007, at 17.49, Anders Peterson wrote:

> On 10 dec 2007, at 14.20, Tor Erik Askeland wrote:
>
>> Hi,
>>
>> I'm quite new to ojAlgo and I'm trying to do a matrix multiplication.
>>
>> Here is the snippet of code I'm trying to run:
>>
>>    r = sx.multiplyRight(currentState);
>>    r = r.add(sxPrev.multiplyRight(previousState));
>>
>> Where sx is 12x2, currentState is 2x1, sxPrev is 12x2 and
>> previousState is 2x1. They are all the type PrimitiveMatrix, but I'm
>> just using the BasicMatrix interface. R is a BasicMatrix by the way.
>>
>> This should result in r being a vector of size 12x1, but the computer
>> just hangs on the first line and doesn't run past it.
>
> Never experienced "just hanging" with ojAlgo. Can you step through  
> the code in the debugger to see what happens?
>
> Does  using multiplyLeft instead work?
>
> r = currentState.multiplyLeft(sx);
>
> /Anders
>
>
>> The second line does however run properly if the first line is  
>> commented out.
>>
>> Have anyone got any suggestions to what the problem might be?
>>
>>
>> Tor Erik
>>
>>
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>