The simplest option, to take the difference between two adjacent points, generates huge noise. However differentiating noisy data is non-trivial. Often we need to differentiate data with Igor - e.g. See also notes and examples here: NumericDemodulation.Click the help button at the bottom of the panel to bring up an Igor help file with more information on how to use the panel. If you are using Igor Pro version 6 or greater, there is a Filter Design and Application control panel that comes built in to Igor.To access the nth row in a map, find out it's dimension, create a wave then assign it to map, i.e for the 2nd row, map (first is 0th!).Use the Image Line Profiles function under the "Image" Tab.Then the "Image" tab will appear next to the "Help" tab.Go the Analysis -> Package, and select "Image Processing".See How to extract rows and columns from a matrix See Saving one graph and associated waves to a new experiment file See Arranging annotations on a graph so that they can be precisely positioned vertically and horizontally
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