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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 macaorigin[/i] [br]Hi, I have a very basic question but I haven't been able to find the answer on the internet and forum... I have an ASCI image, and I am trying to take some parts of it, keeping the dimensions, but I get an empty matrix. What I do: Import the .dat. Convert it to matrix (direct). View as image. Set the dimensions. Select the region I want with the little green rectangle tool. Then click create new. A new (empty :( ) matrix is created. I am working with Origin 8 SR1. It used to work that way when using Origin7.5, but Origin8 works in a different way with matrices and I haven't figured out yet how to create new matrices from a given one. Thanks in advance for your help. Maria (PS: What I want to do is create a 3D graph of a region of the data matrix, where the z axis represents the value of the matrix in each coordinate) Origin Ver. and Service Release: OriginPro8 SR1 v8.07773(B773) Operating System: WindowsXP [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.