ENH: Compute derivatives.
ENH: Compute derivatives.

mspark93/VTK,msmolens/VTK,sankhesh/VTK,candy7393/VTK,naucoin/VTKSlicerWidgets,hendradarwin/VTK,collects/VTK,gram526/VTK,naucoin/VTKSlicerWidgets,keithroe/vtkoptix,aashish24/VTK-old,biddisco/VTK,jeffbaumes/jeffbaumes-vtk,ashray/VTK-EVM,spthaolt/VTK,hendradarwin/VTK,arnaudgelas/VTK,naucoin/VTKSlicerWidgets,sgh/vtk,demarle/VTK,sumedhasingla/VTK,sumedhasingla/VTK,Wuteyan/VTK,daviddoria/PointGraphsPhase1,jeffbaumes/jeffbaumes-vtk,hendradarwin/VTK,johnkit/vtk-dev,gram526/VTK,sgh/vtk,biddisco/VTK,keithroe/vtkoptix,daviddoria/PointGraphsPhase1,collects/VTK,ashray/VTK-EVM,SimVascular/VTK,spthaolt/VTK,collects/VTK,candy7393/VTK,Wuteyan/VTK,demarle/VTK,sumedhasingla/VTK,cjh1/VTK,candy7393/VTK,sumedhasingla/VTK,jmerkow/VTK,berendkleinhaneveld/VTK,spthaolt/VTK,daviddoria/PointGraphsPhase1,sankhesh/VTK,spthaolt/VTK,SimVascular/VTK,berendkleinhaneveld/VTK,ashray/VTK-EVM,candy7393/VTK,Wuteyan/VTK,keithroe/vtkoptix,aashish24/VTK-old,cjh1/VTK,mspark93/VTK,candy7393/VTK,Wuteyan/VTK,hendradarwin/VTK,aashish24/VTK-old,johnkit/vtk-dev,cjh1/VTK,Wuteyan/VTK,msmolens/VTK,berendkleinhaneveld/VTK,gram526/VTK,berendkleinhaneveld/VTK,keithroe/vtkoptix,demarle/VTK,mspark93/VTK,SimVascular/VTK,sgh/vtk,jmerkow/VTK,jmerkow/VTK,msmolens/VTK,collects/VTK,hendradarwin/VTK,candy7393/VTK,sumedhasingla/VTK,jmerkow/VTK,arnaudgelas/VTK,SimVascular/VTK,sankhesh/VTK,johnkit/vtk-dev,biddisco/VTK,sgh/vtk,berendkleinhaneveld/VTK,demarle/VTK,aashish24/VTK-old,mspark93/VTK,mspark93/VTK,ashray/VTK-EVM,spthaolt/VTK,arnaudgelas/VTK,jeffbaumes/jeffbaumes-vtk,msmolens/VTK,candy7393/VTK,msmolens/VTK,hendradarwin/VTK,keithroe/vtkoptix,keithroe/vtkoptix,sgh/vtk,candy7393/VTK,sgh/vtk,berendkleinhaneveld/VTK,daviddoria/PointGraphsPhase1,gram526/VTK,biddisco/VTK,naucoin/VTKSlicerWidgets,SimVascular/VTK,sankhesh/VTK,aashish24/VTK-old,johnkit/vtk-dev,Wuteyan/VTK,johnkit/vtk-dev,jmerkow/VTK,jeffbaumes/jeffbaumes-vtk,demarle/VTK,sankhesh/VTK,keithroe/vtkoptix,gram526/VTK,msmolens/VTK,daviddoria/PointGraphsPhase1,jmerkow/VTK,daviddoria/PointGraphsPhase1,berendkleinhaneveld/VTK,spthaolt/VTK,sankhesh/VTK,sumedhasingla/VTK,mspark93/VTK,ashray/VTK-EVM,naucoin/VTKSlicerWidgets,SimVascular/VTK,cjh1/VTK,mspark93/VTK,Wuteyan/VTK,arnaudgelas/VTK,hendradarwin/VTK,arnaudgelas/VTK,sumedhasingla/VTK,spthaolt/VTK,demarle/VTK,jmerkow/VTK,sankhesh/VTK,keithroe/vtkoptix,biddisco/VTK,naucoin/VTKSlicerWidgets,collects/VTK,collects/VTK,jeffbaumes/jeffbaumes-vtk,johnkit/vtk-dev,aashish24/VTK-old,msmolens/VTK,ashray/VTK-EVM,msmolens/VTK,ashray/VTK-EVM,ashray/VTK-EVM,demarle/VTK,johnkit/vtk-dev,gram526/VTK,SimVascular/VTK,arnaudgelas/VTK,mspark93/VTK,demarle/VTK,sankhesh/VTK,cjh1/VTK,biddisco/VTK,gram526/VTK,sumedhasingla/VTK,biddisco/VTK,SimVascular/VTK,gram526/VTK,cjh1/VTK,jmerkow/VTK,jeffbaumes/jeffbaumes-vtk