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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 nicolas1988b[/i] [br]Origin Ver. and Service Release (Select Help-->About Origin): Operating System: Hi, i have a problem with the fitting curve tool. First of all, i already read the tutorials and videos. the version of origin is 8 (pro), the proble is that the tool does nothing. i created a function of my own, plotted the data and get a graph like this, notice the logaritmic scale. [img]http://www.originlab.com/ftp/forum_and_kbase/Images/Capturagrafico1.PNG[/img] y didint use initial parameters diferent than 1. but the curve did this every time.[img]http://www.originlab.com/ftp/forum_and_kbase/Images/Capturagrafico2.PNG[/img] y also use the Regional data selector, but didnt change anything. Please help. [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.