[Help] How to use the fitting peak after using Multipeakfitting

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Wed, 07/20/2011 - 12:28 pm

Hi, I just start learning Igor and got a problem.
I have a 2D curve, and use Gaussian function in Multipeakfitting to find out all fitting peaks. Then I want execute a function which need use the fitting peak. But I don't know what the wave name for those fitting peaks. Then I click "edit peak1" after a right click on the peak1 in the graph. This give me a table window contains "Peak1.x" and "Peak1.d". So, I use "Peak1.x" and "Peak2.d" in my function. The result is Syntax error "expected wave name".

Currently, I copy those "Peak1.x" and "Peak1.d" into Excel and then copy them back to Igor. Then I can use those fitting peak waves. But the way is inconvenient.
Is anyone know some easy way to use those fitting peaks in a function?

Thank you very much!
humanzh-2@hotmail.com
Peak1.x and Peak1.d are not waves; Peak1 is a wave. The ".x" and ".d" extensions are used in Igor tables to show the scaled X values and the data values. This is a fundamental concept in Igor. I suggest you go through the Getting Started help, in particular the Guided Tour. You can find it at the top of the Help menu.

You don't say which version of Multipeak Fit you are using. The waves are stored in somewhat different places. In any case, the waves like 'Peak 1' that you find in the data folder for your fit are the waves that create the small individual peaks at the bottom of the Multpeak Fit 2 graph. You could use them (probably best to make copies) but you might prefer to create your own data sets so that you can control the number of points and X range. You can use the GaussPeak function that is part of the PeakFunctions2.ipf procedure file that is loaded as part of Multipeak Fit 2. To view the procedure file, select Windows->Procedure Windows->Peakfunctions2.ipf.

John Weeks
WaveMetrics, Inc.
support@wavemetrics.com

July 21, 2011 at 09:15 am - Permalink