asecant's articles:

Items(9) /1

? cal the length and area of contours 4 2 (5/18/2013 10:36:24 AM) comp.soft-sys.matlab Hi: One can use contour() to plot contours. But how does one calculate the length and area of a contour? Thanks, ... Cheng

? why cannot get LS soln with mini norm 1 139 (6/14/2010 8:19:42 AM) comp.soft-sys.matlab Hi: I tried the following algorithm to see if I can get min norm LS soln for solving min f, f = 0.5*norm( A*x-b ), A is m-by-n and m < n. But the algorithm did not converge to the min norm LS so... Cheng

? plotting a p-ball 5 156 (4/10/2010 11:09:21 PM) comp.soft-sys.matlab Hi: Are there existing mfile or do anyone know how can one plot the region of a p-ball? P-ball comes from the definition of p-norm below. norm(x, p) = ( sum( abs(x(i))^p, i = 1 to N ) )^(1/p) e.g... Cheng

? process mesh file 0 37 (8/19/2009 6:14:41 PM) comp.soft-sys.matlab Hi: Matlab is good in numerical computations, and there is a software called Amira that is good in generating FE mesh. But Amira has its own file format. Suppose we have mesh file generated by someone else ... Cheng

? show FE mesh from STL file 0 30 (8/12/2009 4:25:15 AM) comp.soft-sys.matlab Hi: How can one use Matlab to retrieve finite element mesh stored in STL file and then display those triangular or tetrahedron mesh? Thanks, ... Cheng

? read file consisting of text and numbers in little endian 11 30 (7/8/2009 12:48:59 PM) comp.soft-sys.matlab Hi: I have a file named image.123. I do not know what format this file belongs to, thus I opened it using Wordpad.exe. It content is as follows. My goal is to use Matlab to get the numbers in this line. B... Cheng

? remove dicom info 6 49 (7/6/2009 5:55:50 PM) comp.soft-sys.matlab Hi: I am trying to remove some info contained in dicom file. I tried the following script but then some connectivity between images are destroyed. For example, originally when I import that set of dicom image... Cheng

? plot colored circles in 2d 1 31 (5/5/2009 6:55:33 PM) comp.soft-sys.matlab Hi: I have the following datset: Q.x, Q.y, and Q.strength x and y are x and y coordinates, and strength is some value. I want to visualize this dataset as some small circle spreading on the xy-plan... Cheng

outer product of higher dim 3 32 (8/17/2008 8:13:03 PM) comp.soft-sys.matlab Given a1 = rand(3,1) and a2 = rand(2,1), we construct a 2D array by A2 = a1*a2'. But how about constructing an array of higher dimension? For example, A3(:,:,:) = ? given a1 = rand(3,1), a2 = rand(2,1) and ... Cheng

asecant's replies:

Items(2) /1

? read file consisting of text and numbers in little endian 11 30 (7/8/2009 12:48:59 PM) comp.soft-sys.matlab Hi: I have a file named image.123. I do not know what format this file belongs to, thus I opened it using Wordpad.exe. It content is as follows. My goal is to use Matlab to get the numbers in this line. B... asecant (15)

? cal the length and area of contours 4 2 (5/18/2013 10:36:24 AM) comp.soft-sys.matlab Hi: One can use contour() to plot contours. But how does one calculate the length and area of a contour? Thanks, ... asecant (15)