Re: [ojAlgo-user] power or round functionality

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

Rounding can be done using UnaryFunction - just create an instance that does what you want. The class NumberContext can give you a function that may suit you. Instantiate a NumberContext and then call get***Function() 

There’s also the SCALE function of PrimitiveFunction. When/if you specify the parameter it turns into a unary function.

I think you should switch from using BasicMatrix to MatrixStore/PhysicalStore.

For “pow” you need a binary function...

fillMatching(Access1D<? extends Number>)
fillMatching(Access1D<Double>, BinaryFunction<Double>, Access1D<Double>)
fillMatching(Access1D<Double>, BinaryFunction<Double>, Double)
fillMatching(Double, BinaryFunction<Double>, Access1D<Double>)


> On 27 apr 2015, at 20:30, Argyrouska Bob <esp...@gm...> wrote:
> 
> Sorry,
> 
> Thanks for your prompt reply.
> Maybe I didn't make myself clear. I was referring to exponential similar to what native Java Math.pow() does.
> What I am looking for is:
> 
> BasicMatrix tA, tB;
> tA.pow(tB); or tA.pow(2.0);
> 
> which will eventually lead to tA^x, where x=element from tB (applied for each element) or a constant value.
> Secondly a round function similar to what native Java Math.round() offers.
> Meaning:
> 
> BasicMatrix tA;
> tA.round(RoundindMode);
> 
> which will result in rounding each element of tA to RoundingMode, where RoundingMode=FLOOR, CEILING etc
> Are these possible using UnaryFunctions?
> 
> Thanks
> 
> On 27 April 2015 at 20:00, Anders Peterson <an...@op...> wrote:
> Sorry, I just noticed you were using BasicMatrix. It works a little different there (a somewhat limited set of functionality) partly because BasicMatrix instances are immutable. It does have a modify-method:
> 
>     BasicMatrix modify(UnaryFunction<? extends Number>);
> 
> 
> 
> 
> > On 27 apr 2015, at 18:51, Anders Peterson <an...@op...> wrote:
> >
> > Do you want to modify matrix elements?
> >
> > Everything that implements Access2D.Modifiable has these methods:
> >
> > modifyColumn(long, long, UnaryFunction<N>)
> > modifyDiagonal(long, long, UnaryFunction<N>)
> > modifyOne(long, long, UnaryFunction<N>)
> > modifyOne(long, UnaryFunction<N>)
> > modifyRange(long, long, UnaryFunction<N>)
> > modifyRow(long, long, UnaryFunction<N>)
> >
> > If you’re using primitive double elements you’ll find a predefined set of functions in org.ojalgo.function.PrimitiveFunction
> >
> > The PhysicalStore.Factory also provides access to that set of functions.
> >
> > If you don’t find what you need you just create a custom UnaryFunction implementation.
> >
> > /Anders
> >
> >
> >> On 27 apr 2015, at 18:29, Argyrouska Bob <esp...@gm...> wrote:
> >>
> >> Hello,
> >>
> >> I am a new member and still practicing with library but what surprises me is that I haven't found support for power functions or round to a BasicMatrix data type. Is this true or it's named somewhat different?
> >>
> >> Thanks and regards,
> >> silver
> >>
> >>
> >> ------------------------------------------------------------------------------
> >> One dashboard for servers and applications across Physical-Virtual-Cloud
> >> Widest out-of-the-box monitoring support with 50+ applications
> >> Performance metrics, stats and reports that give you Actionable Insights
> >> Deep dive visibility with transaction tracing using APM Insight.
> >> http://ad.doubleclick.net/ddm/clk/290420510;117567292;y_______________________________________________
> >> ojAlgo-user mailing list
> >> ojA...@li...
> >> https://lists.sourceforge.net/lists/listinfo/ojalgo-user
> >
> 
> 
> ------------------------------------------------------------------------------
> One dashboard for servers and applications across Physical-Virtual-Cloud
> Widest out-of-the-box monitoring support with 50+ applications
> Performance metrics, stats and reports that give you Actionable Insights
> Deep dive visibility with transaction tracing using APM Insight.
> http://ad.doubleclick.net/ddm/clk/290420510;117567292;y
> _______________________________________________
> ojAlgo-user mailing list
> ojA...@li...
> https://lists.sourceforge.net/lists/listinfo/ojalgo-user
> 
> 
> 
> -- 
> Reality leaves a lot to imagination.
> ------------------------------------------------------------------------------
> One dashboard for servers and applications across Physical-Virtual-Cloud 
> Widest out-of-the-box monitoring support with 50+ applications
> Performance metrics, stats and reports that give you Actionable Insights
> Deep dive visibility with transaction tracing using APM Insight.
> http://ad.doubleclick.net/ddm/clk/290420510;117567292;y_______________________________________________
> ojAlgo-user mailing list
> ojA...@li...
> https://lists.sourceforge.net/lists/listinfo/ojalgo-user