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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 ysdg[/i] [br]im working on axial dispersion (one column) and want to correlate it (my correlation is a power law function) to two other variables (two different columns). When i launches the non linear curve fitting, an error message appears: "too many bad data points or functional evaluations". <P>how can i work out this problem?<P>thanks! [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.