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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Anti-Spam Code: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by mattcschmidt[/i] [br]Origin Version (Select Help-->About Origin): 7.5 Operating System: xp I am trying to map out data from an irregular shape semiconductor sample. I have power data (z) in an xy spatial grid over the sample. However, when I convert the data into a matrix it seems that I must use some sort of a smoothing function, such as "renka-cline". The problem is that there are some xy coordinates that don't have data, because the sample is not a perfect rectangle (physically no sample in parts of the rectangular grid). Also, there are some devices on the wafer that don't work so they don't have any data. Origin takes these null points and treats them like zeros. The "renka-cline" function and others use all of these zeros to create a data set that isn't really representative. I end up getting a slope down to zero at the edge of the wafer as well as spots on the wafer that did not have a working device. So, I would like to be able to do two things: 1) get origin to simply ignore null data points (devices in the sample that don't work) 2) get origin to not "smooth" down to zero (edge of the irregular shaped sample; I want the data to just stop at the edge and jump directly to zero) I suppose a fix for 1 could be to simply put in a number that was the average of those around it, but this is not ideal. Any help would be very appreciated. Thanks, matt [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.