I am looking for a way to create a 2D scatter plot with 4 coloured zones for 4 rectangular quadrants of the plot area. This is to quickly see visually which zone each plotted point falls within. I could not find anything similar in JMP11, so any tips/hints scripts would be appreciated.
You can use a graphics script to do this (see for example: http://www.jmp.com/support/help/Adding_Scripts_to_Graphs.shtml for how to do this 'by hand').
If you want to do it programmatically, you can tinker with the script below to get it the way you want. Cut and paste the code into an editor window, then select 'Edit > Run Script').
// Example data
dt = NewTable("Scatter PLot",
NewColumn("x", Numeric, Continuous, Formula(RandomNormal())),
NewColumn("y", Numeric, Continuous, Formula(RandomNormal())),
// Bivariate plot
biv = dt << Bivariate(X(:x), Y(:y));
// Add graphics script for 'quadrants'
xVals = Column(dt, "x") << getValues;
xMid = Quantile(0.5, xVals);
xDel = Max(Abs(Max(xVals) - xMid), Abs(xMid - Min(xVals)));
xMin = xMid - 100*xDel;
xMax = xMid + 100*xDel;
yVals = Column(dt, "y") << getValues;
yMid = Quantile(0.5, yVals);
yDel = Max(Abs(Max(yVals) - yMid), Abs(yMid - Min(yVals)));
yMin = yMid - 100*yDel;
yMax = yMid + 100*yDel;
// Tempate expression to add graphics script
Add Graphics Script(
Description( "Quadrants" ),
Transparency( 0.3 );
// Top left
Fill Color( "Red" );
Rect( xMinTBD, yMaxTBD, xMidTBD, yMidTBD, 1 );
// Top right
Fill Color( "Green" );
Rect( xMidTBD, yMaxTBD, xMaxTBD, yMidTBD, 1 );
// Bottom left
Fill Color( "Blue" );
Rect( xMinTBD, yMidTBD, xMidTBD, yMinTBD, 1 );
// Bottom right
Fill Color( "Black" );
Rect( xMidTBD, yMidTBD, xMaxTBD, yMinTBD, 1 );
// 'Bake in' values for this data to this expression
// Add the graphics script
Ian@JMP has a good idea.
Another option in JMP 12 is to use the new color and range options in the Axis specification dialog to do this.
Double click on the axis and then use the Allow Ranges and Color options in the Reference Lines section.