To normalize by total area or wavemax, use the trace and all traces menus (right click or shift-right click on a trace). This package also has some functions for normalizing spectra by peak height, peak area or total area. It's up to the user to copy data into a more useful location. The waves displayed in the table are located in the package folder. The results of all-in-one calculation are presented in a table. Includes options to do all-in-one determinations for all of the traces on the plot. Selects the best fit from attempts to fit a pair of Lorentzian, Gaussian and Voigt peaks. Works best if the peaks are positioned at 1/4 and 3/4 of the selected x-range. Gives peak height, FWHM, area, and position for the best fit.ĭoublet Peak: Attempts to fit a pair of peaks to a doublet and derives peak position, height, FWHM, and area parameters. Peak fit: Selects the best fit from Gaussian, Lorentzian and Voigt over the selected x-range. Also gives peak position.Īrea and Centroid: integrates the data over the selected range and calculates both the centre of mass and the position of area/2 in the integral wave. I used a polynomial so that it should work with asymmetric peaks. For this to work nicely you should select a narrow region around the peak. Peak height: fits a third order polynomial through the selected range, and then tries to find the peak by looking for the first zero-gradient within that selected range. Spectra must be baseline-free for these functions to be useful! Fit-derived uncertainties are not really meaningful. Select the 'clear' submenu to remove tags from the plot. When a trace is selected from the list of traces that pass though the marquee, the results of the calculation are written to history and shown in a tag on the graph. Right click within the graph marquee to select which of these you want to calculate. They're used to determine peak heights, areas, centroids (centres of mass), and full-width at half-maximum (FWHM). Most of the Marquee Peak functions use the graph marquee to select a subrange of a plotted trace. But, when you have many spectra plotted in a graph and want to produce just a quick list of peak heights for all of the traces, you may find Marquee Peaks to be helpful. For more advanced decomposition of overlapping peaks Igor's multipeak fitting package works well, and global fitting is useful for fitting with linked coefficients.
![igor pro 7 peaks igor pro 7 peaks](https://media.dcrainmaker.com/images/2021/05/clip_image002.gif)
Most of these parameters could be equally well determined by positioning cursors and using command line or quick fit menus, but I find the graph marquee to provide an especially efficient interface for selecting regions of interest.
#Igor pro 7 peaks code
This is based on code that I've used for many years before cleaning up and posting here. Wide-Angle Neutron Spin Echo SpectroscopyĪ user interface that uses the graph marquee as an efficient way to select an x-range in order to make quick estimates of peak parameters.