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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 hrbacekj[/i] [br]I have a NMR image that should represent homogeneous tissue. NMR response was measured in several points of the image. Indeed, it is not points but small areas called regions of interest (ROI). NMR device gives average value of ROI and its standard deviation (SD). This way I have set of data points and their SD. Data points have their x,y coordinates in the image. Is it posible in Origin to plot a function over (x,y) plane that would fit experimental data? I want to create fit function that would also consider SD of data points. Thanks. [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.