All Forums  Origin Forum  Origin Forum  Chi Square

Note: You must be registered in order to post a reply.
To register, click here. Registration is FREE!

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 srira[/i] [br]Origin Version (Select Help-->About Origin): 6.1 Operating System:XP Hi I would like to know about the chi sq values.For eg, I fit a curve using NLSF with 4 parameters, so the degrees of freedom is 4. From the chi sq table, the value varies between 4.11(prob.=.25) to 17.73 (prob.=.0005).Hence reduced chi sq. (one gets from origin fitting) varies between 1.03 to 4.4325. Can this be taken as the limits for curve fitting with 4 parameters?What would be the optimum value of chi sq. one has to look for? Sometime though there are 4 parameters, the optimization is done by fixing any 2 paramaters.Can this be taken as usage of only 2 degrees of freedom? Thanks! [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.