Y-Value Colormapping for Scatter, Column/Bar, Area Plots

ORG-13741

Y-Value color mapping was only supported for line plots including waterfall plots. Since Origin 2016, we added it for plot plot types that support colormapping.

E.g. 

1. Import Group.dat under Samples\Graphing folder.
2. Select column B, C and D to plot them as scatter graph.
   --> Each plot has a unique color, e.g. B is black, C is red and D is blue.
3. If you want to map color of the points to corresponding Y values, click on any scatter point
4. Click Line/Border Color  dropdown list on Style toolbar.
5. Go to By Points tab, choose Y-Value: Color Mapping.
   --> Each point is colored based on the Y values.

When using Y-Value Color Mapping. Origin find the min and max of all Y plots in the group and build colormap levels.

On Plot Details dialog, you will see on Group tab, color's Increment column is set to None, while on Symbol tab, Symbol Color is set to Y-Value: Color Mapping. 

On Colormap tab, the Levels are from min to max of all Y columns in the group of plots.

For column/bar or area plots, the color control is on Pattern tab.