Matlab

Plot a line perpendicuar to another line from its midpoint
Hi everyone. I'm trying to plot a line perpendicular and in the middle of another line. I'm already half way through but I'm stuck when trying to plot from the middle: check this link: http://dl.dropbox.com/u/5800838/untitled.jpg I did the following code: x1 =GR_endpoints(plotnext,2) %start point of li... 3 Apr 2010 18:08

SPECT Projection Reconstruction & Sinograms
Good morning, I learning how to reconstruct SPECt images and need some help. Here’s what I have: A 128x64 array, 120 angles (slices), 2 byte integer To open the projection file into a 2-D array I used the following commands: fid=fopen(‘imageA.prj’); B=fread(fid,[128,64], ‘uint16&... 3 Apr 2010 15:56

Multiple axes in GUI
Hi, I have a similar problem. I have a GUI with more axes, I work in an external m file using the handle of the GUI. What I would like to do is something like : text(gui_handle.axes1,0,0,'hello world'); but text command doesn't take axes as params, so what i do is the following: axes(gui_handle.axes1); te... 3 Apr 2010 22:30

Creating Noise
I have signal to which I want to add a noise of 6 db and flat frequency spectrum over a defined frequency range of 0 -90 Mhz. can anyone help thanks ... ... 3 Apr 2010 14:49

to find major and minor axis length
Hello, i am a final year student doing my project is on image processing in this i want to find the major and minor axis length of the image.please help me .i want the matlab coding to find major and minor axis length.please help me as soon as possible.thanks in advance. ... 4 Apr 2010 00:41

Removing indices from a vector
Hi Eamonn, a(2,:) = []; Best. ... 3 Apr 2010 12:36

Removing indices from a vector
I have a vector set up like this a = [[5 2 1 4 8]' [6 3 10 3 -5]']; % [x] [y] I want to delete the x and y at the same time I am able to show the two indices by doing this [a(2,1) a(2,2)] I try and delete them by doing this [a(2,1) a(2,2)]=[] I get this error 'Too many output arguments.' I have also ... 3 Apr 2010 12:36

regarding data compression technique
hey folks, i read in some paper that BWT (burrows wheeler technique) can be improved by using huffman encoding.but where and when it should be applied? BWT's basic scheme is.... BWT-> MTF->RLE. on applying RLE, output will be string of integers.but hufmann is applied on alphabets,so how cn we apply it in the BW... 3 Apr 2010 12:36

how to create an array with 2 rows and 4096 columns for storing image intensity values using for loops
how to create an array with 2 rows and 4096 columns for storing image intensity values using for loops ... 3 Apr 2010 19:13

Trigonometry Tutorial
Hi, below is a link to a trigonometry tutorial that uses interactive flash programs to explain the basics of trigonometry. http://www.fourier-series.com/Math/Trig/index.html I also have other material on the website that may be of interest including a fourier series tutorial and a DFT tutorial Brent ... 3 Apr 2010 11:30