All Forums  Origin Forum for Programming  LabTalk Forum  can't fit multiple datasets with nlfit X-function

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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 buckmurdock[/i] [br]Origin 8 SR5, with Vista. I'm having a lot of trouble using the "range" command with the nlbegin/nlfit/nlend X-functions. I have a worksheet with many data columns in XYXY... format. I want to fit several of them simultaneously, with individual parameters, and specifying a row range. And I want to fit them directly from the worksheet, without having to plot them first. It seems like it should work like this: [font=Courier New]range aa=1[1001]:8[1200]; nlbegin aa expdecay2 tt cons; nlfit; nlend 1;[/font=Courier New] I expect this to fit my first 4 sets of XY data, but it seems that it only looks at the first column in my range. So this fits col 1 (X data) against itself. If I instead use "[font=Courier New]range aa = 2[1001:1200][/font=Courier New]", then it correctly fits col2 against its X data in col1. But if I use "[font=Courier New]range aa = 1[1001]:2[2000][/font=Courier New]" then it just fits col1 against itself. So how can I fit multiple datasets using the X-function commands? Thanks in advance. [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.