Matlab

How to Find Surface Normal of each triangle in a Surface.
Question: Hi!!! i have created delaunay triangles of a surface using x,y,z co ordinates. now i want to find Surface Normal of each triangle in a Surface? i have tried theroriticall formaula.. but is there any MATLAB Command available to find normals easily??? if so please guiide me... BY Sivabalan vigisiva(a)gma... 31 Mar 2010 06:32

Vectorization help
Hi, I have 4d-data, namely certain measurement vector V(t) for each point in x,y,z grid. From this set, I need to find one point x1,y1,z1 which is closest to my given reference vector, similarity metric is sum of squared errors between reference and data vector. Data vectors may be shifted also in t-dimension, all v... 1 Apr 2010 09:01

How to? Excel RANK function in Matlab?
I know this is a really old thread, but could someone please explain to me how Bruno's solution works? I can't see how it arrives at the correct answer. Thanks, James. ... 31 Mar 2010 14:20

Remapping a Matrix.
Hi Guys, New user to Matlab. I have to write an engineering program in Matlab, & need to remap entries in 3 different 6x6 matrices, to make a large 18x18 matrix. Any suggestions on how I might go about this? regards Sumeer ... 31 Mar 2010 05:26

use of trapz
I have a specific question about using the "trapz" feature. I'm trying to find the area under a curve which can be done using "trapz". However, I want to find the area of a curve under a specific range and not the entire curve. How can I do that? thanks in advanced ... 31 Mar 2010 06:32

working with map
hi i have map (jpg/png file) of my floor (with specific resolution) including walls, doors... i'm going to give 2 points and want to know if there will be line of sight. some idea how to do it? thank you ... 31 Mar 2010 05:26

swap matrix
i have the question about the example of the coding to flip the matrix A = 1 2 3 4 5 1 2 4 5 6 3 4 5 6 7 ... 31 Mar 2010 08:43

Image segmentation
I want to segment carotid artery from its ultrasound image. I have tried level set, k-means,fuzzy c means but am not able to segment properly. can anyone help or suggest some segmentation methods . send me the matlab codes to modify the program to segment properly... ... 6 Apr 2010 10:46

convert image to 5 x 7 px
Good day. I am new in matlab image processing. I have some images which size around 60 x 80px. And i would like to convert it into size of 5 x 7. I had tried imresize but it did not work. Is there any way to convert it? Thanks very much ... 31 Mar 2010 05:26

warning using patch
Hi, I have a problem when I try to use patch. I have this warning: Warning: Values in patch Faces must be in [1 : rows(Vertices)] - not rendering. I have no idea how to solve it, please help! thank you. ... 31 Mar 2010 10:57