Create a Forum Topic by Logging In or Creating an Account

Graph Marquee Shape

Tue, 06/14/2011 - 08:09 am

Hi,

Is it possible to have a graph marquee be other shapes than a rectangle? Sometimes, selecting the desired data points using a rectangle means selecting extra points. And if you do not want to include the extra data points, you would lose the ability to select all of the desired points.

Thanks.

johnweeks

Ken-

The short answer is No. Graph marquees are always rectangular.

The long answer is that it is possible with a lot of work to program polygons to do the job. Possibly a WaveMetrics procedure that ships with Igor will do what you want already- add this line to your Procedure window:

#include <Select Points for Mask>

and click the Compile button. Now bring forward the graph you want to work on. Select Graph->Select Points for Mask. That will add a control panel to your graph with a GUI for drawing polygons around points to select them. Note the Help button in the control panel...

Perhaps this package should be elevated to the status of a package in the Graph->Packages menu. Information about this and other WaveMetrics Procedures is available in Windows->Help Windows->WM Procedures Index.ihf.

John Weeks
WaveMetrics, Inc.
support@wavemetrics.com

June 14, 2011 at 09:49 am - Permalink