About P1D derivative() method:

[feilangrenM]

Hi,
I have a problem when using P1D derivative() method.

I have a filled P1D instance defined as "P1D p1=new P1D（double[],double[]） " without errors added.

And p1 can be plotted accurately,
but the problem happened when excuting"P1D p2=p1.derivative()" .

This is the wrong message:
java.lang.NullPointerException
at jhplot.P1D.getYupper(P1D.java:4824)
at jhplot.P1D.derivative(P1D.java:5245)
at com.sbl.io.video.ScanTest3.main(ScanTest3.java:134)

I'll be very grateful for your help!
Thanks
ColdWind

[sergei175]

Hello,

Yes, this is a bug. In fact, the derivative can be calculate only if there are stat. error on Y, but this is not your case.

I've put this correction to the Beta version v1.8

http://jwork.org/scavis/releases


There is a also a small example in

http://jwork.org/scavis/wikidoc/doku.php...ollections

that make this plot (attached)

   

[feilangrenM]

(05-14-2014 11:11 AM)sergei175 Wrote:  Hello,

Yes, this is a bug. In fact, the derivative can be calculate only if there are stat. error on Y, but this is not your case.

I've put this correction to the Beta version v1.8

http://jwork.org/scavis/releases


There is a also a small example in

http://jwork.org/scavis/wikidoc/doku.php...ollections

that make this plot (attached)

Thank you,Sergei.
Maybe,this is the problem.
But,The "scavis_onejar1.6" used in my JAVA project hasn't been updated.
Can you do something for that?