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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 ecerda[/i] [br]Origin Ver. and Service Release (Select Help-->About Origin): Ver 8.5.0 R1 Operating System: Windows XP I have a matrixLayer with N matrix objects of size nRow rows x nCols columns (imported from H5 file). I need to rearrange the elements in such a way that all the first elements of the first column of each matrix object are placed in the first column of the first matrixobject, the second elements of the first column in the second column of the first matrixobject and so on. The new multidimensional matrix would have therefore have nRows matrix objects of size N rows x nCols. In other words, I need to rotate the 4D matrix 90 deg arounbd the x axis (columns) such that the matrixobjects and the row indexes exchange: (nrow,ncol,N) -> (N,ncol,nrow). I tried using 3 nested loops (rows, columns and matrixobject, with that hierachy) in which I define every time the matrixobject I need as a matrix and access the pixel individually and copy it to the new matrix.. this works, but it is too slow for the size of objects I have (200x200 pixels and 70 matrixobjects.) I would be very grateful for some useful advice. [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.