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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 Forum: Origin Forum Subject: Message: * HTML is OFF * Forum Code is ON Smilies Origin 2021b Dear all, I have a series of data organized as xyz that I'd like to plot as a heatmap. I can convert that to matrix but I have a lot of missing data. so, I use the TPS method but I have trouble understanding the various parameters (smoothing, exptrapolation, tolerence) and how they should be set. I couldn't find this information in the online manual . thanks ! scalpa   Check here to subscribe to this topic.