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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 Matthias Mueller[/i] [br]Origin Ver. 9.1 and Service Release (Select Help-->About Origin): Operating System: Windows 7 Hello, I created a 2D contour plot with vertical and horizontal profile lines (see attached screen shot). The interval of y values is not evenly spaced (see line "Y coordinate" in Book1). However, the vertical profile uses an evenly spaced interval (see column A in "ProfileData"). How does Origin choose these values? Can I force it to take my pre-defined interval? This would allow to show a vertical profile, which has the actually measured values at my pre-defined intervals (of course with interpolated values in between). Hope someone can help! Thanks! Matthias [img]http://www.originlab.com/ftp/forum_and_kbase/Images/Contour_plot_profile.jpg[/img] [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.