All Forums  Origin Forum  Origin Forum  Fitting with function given in polar coordinates

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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 Emgee[/i] [br]Origin Ver.=7 Operating System=WinXP Hi, I have data given in cartesian coordinates and want to fit it with a function I defined via "Analysis--->Non-linear curve fit--->Advanced fitting tool". But I would like Origin to interpret the independent variable in the formula as angle and the dependent variable as radial distance, i.e. to explain it that my fitting formula is in polar coordinates, not cartesian. How can I do this? Thanks a lot! M. [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.