All Forums  Origin Forum  Origin Forum  fitting multiple data sets

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 eray.w[/i] [br]Origin Version (Select Help-->About Origin): 7 Operating System: windows i have 3-5 data sets. a column of y values, a column of x values, and each set has a unique, single z value. i'd like to fit the 3-5 curves and solve for a pair of parameters. the way i did this last year, was to make 7 columns of data: one x column, 3 y columns, and 3 z columns. since there is only one value of z for each column of y data, i just filled the whole column with the single value. i defined my formula: y=p*(1-exp((-kinh*x*z)/(2*KI + z))). set up with 3 parameters (p,kinh,KI), one dependent variable (y) and two independent variables (z,x). clicked fit multiple data sets to give me the right number of data sets and assigned my x,y and z columns of data. i toggled kinh and KI parameters to be shared, and left p unshared. assigned initial values, and it worked like a champ-- i was able to find the two values i needed (kinh and KI) for 50 assays worth of data (each assay with 3-5 sets of data). i've been unable to do it again this year. now every time i set up this way i get a message "error 28036(?) try assigning p-2 fixed..." or something like that. any got any ideas as to what's going on? [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.