Contour plot, set X and Y ranges in JSL

[#1]

When creating a contour plot in JSL, is there a way to set fixed (pre-determined) values for the X and Y maximum and minimum? I.e. to define the area the contour plot will cover, as can be done manually in the X / Y Axis Settings dialogue?

My datasets cover different ranges in x and y, but I would like all contour plots to have the same x and y extents.

Something like:

Contour Plot(
	X( :X_col, :Y_col ),
	Y( :data ),
	X_minimum(-75000),
	X_maximum(75000)
)

(This obviously does not work.)

[#2]

The messages that can be sent to the Contour Plot are documented in the Scripting Index, under the Contour Plot selection.  What you are looking for is the Specify Contours message.  The easiest way to get the messages to use, is to run the platform of interest(Contour Plot) with the specifics you want, and then to save the script to a script window.  It will have the JSL required to do the specifics you have requested.

Names Default To Here( 1 );
dt = Open( "$SAMPLE_DATA/Little Pond.jmp" );
obj = dt << Contour Plot( X( :X, :Y ), Y( :Z ) );
obj << Specify Contours(
	Min( -4 ),
	Max( 8 ),
	N( 4 )
);

[#3]

Thanks for the quick reply, but that sets the Z range, but what I would like to do is set the X-Y extent of the contour plot. I have tried saving the result of the manual process to the script window before, but I ended up with this:

SendToReport(
		Dispatch(
			{},
			"1",
			ScaleBox,
			{Min( -75000 ), Max( 75000 ), Inc( 20000 ), Minor Ticks( 0 )}
		)
	)

I wasn't able to incorporate this in the call of the Contour Plot platform using JSL.

[#4]

Do you mean this by incorporation ?
What does your log window say?

[#5]

This works, but only with the Specify Contours() command. If I take out this line, the log window records:

Cannot find ScaleBox[ "1" ] at {}
Cannot find ScaleBox[ "2" ] at {}

Unfortunately, I do not want to define the contour limits (in Z) manually, I was happy with JMP doing this automatically. My dataset is quite large, and I create several contour plots from it, hence manually calculating the min and max for each and passing it to the Specify Contours() command is possible but a bit awkward.

[#6 · Accepted solution]

If you are looking to change the X axis values, not the contour values, they can be set by changing the AxisBox values for the X Axis

.

Names Default To Here( 1 );
dt = Open( "$SAMPLE_DATA/Little Pond.jmp" );
obj = dt << Contour Plot( X( :X, :Y ), Y( :Z ) );
Report( obj )[AxisBox( 2 )] << Min( 100 ) << Max( 300 );

Names Default To Here( 1 );
dt = Open( "$SAMPLE_DATA/Little Pond.jmp" );
obj = dt << Contour Plot( X( :X, :Y ), Y( :Z ) );
Report( obj )[AxisBox( 2 )] << Min( -100 ) << Max( 400 );

[#7]

Thanks, Jim, that's what I was looking for!

One minor detail - as mentioned, I create multiple plots, using the "By" attribute. So I had to loop over all obj elements:

n = N Items( obj );
For(i = 1, i <= n, i++,
	Report( obj[i] )[AxisBox( 1 )] << Min( -75000 ) << Max( 75000 ) << Inc( 25000 );
	Report( obj[i] )[AxisBox( 2 )] << Min( -75000 ) << Max( 75000 ) << Inc( 25000 );
);

This works, but please let me know in case there is a more elegant way.

[#8]

Your approach is a fine way to handle this. Or if you are familiar with the XPath language you could use

( obj << xpath( "//PictureBox//AxisBox[@charID = '1']")) << Min( 100 ) << Max( 300 ) ;

[#9]

An easy way to do this might be to set the Axis Property for your X and Y columns. That will ensure that every plot made with those columns has the scaling that you want.