All Forums  Origin Forum  Origin Forum  fitting an integral equation

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 friedman[/i] [br]Origin Ver. and Service Release (Select Help-->About Origin): OriginPro 2015 Operating System: Mac with crossover I have been having trouble fitting with an user defined integral equation despite following the instructions posted on the origin website. When I try to fit with my equation, it crashes my software. Here are the steps that I followed: Integrand Name: fourT Integration variable: t arguments: iD, iL, iB, its, iA return exp(-iL^2/(4*iD*t))*cos(iA*iB*t)*exp(-t/its)/sqrt(4*PI*iD*t) Independent variables: B dependent variables: y parameters: S0, ts, D, L constants: A Parameters: lower limit=0, upper limit=inf, iD=D, iL=L, iB=B, its=ts, iA=A Constants: A= 17597723 y=S0*integral(fourT, 0, inf, D,L,B,ts,A) The quick check seems to work. What am I doing wrong? Thanks [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.