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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 atom0007[/i] [br]I have a set of x,y,z data that is not uniformly spaced. To convert to a matrix suitable for 3d plotting, I can select the z column and then do edit:convert to matrix:random xyz and then select the appropriate options. However, I have the same data in an Excel spreadsheet in the form of a matrix (with the x and y values at the left and top of the matrix). Is there anyway I can perform the 2d interpolation directly on this matrix, without first retyping the data into an Origin worksheet and then doing the random xyz option? Hmmm, hope this makes some sort of sense to someone out there! Thanks. Andrew [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.