Matlab

intersection of line and polygon
I am using the command 'polyxpoly' to find the intersection of a polygon and a line on a map. I want to know how I can generate this line on the map without using cartesian coordinate system i.e., I want to draw a line from one lon,lat to another and find its intersection with a polygon in terms of lat,lon. How can I d... 30 Jun 2010 06:29

problem with CDR calculation
I have a problem with CDR (Cup to Disc Ratio) calculation, using retina fundus image like this http://www.google.com/images?hl=en&source=imghp&q=retina&gbv=2&aq=f&aqi=&aql=&oq=&gs_rfai= I need first to detect the optic disc, then I need to detect the optic cup, then to calculate the Cup to Disc Ratio. plea... 30 Jun 2010 06:29

How to copy and add a matrix for a large number of times?
Hello, everyone. I generated a matrix 125*16 (matrix1). And then, I want to copy it for 50 time and connected to the end of the first matrix for 80 times in order to produce a 10000*16 (Matrix). To add it like this : Matrix = [matrix1;matrix;matrix;.....] is troublesome very much. Is there any conv... 30 Jun 2010 06:29

Improving the condition number of rectangular matrix
As the topic says, does anyone have any tips for improving the conditioned number of a rectangular matrix? I'm using rectangular matrices for estimating a system according to a linear model, y = H*w, however, with the code I use now, the condition number of the complex matrix H can be in the order of 10^6 ~ 10... 26 Jul 2010 09:25

Simulink duplicate data logging
"Steve Conahan" <sconahan(a)mathworks.com> wrote in message <bi5bm0$hmj$1(a)fred.mathworks.com>... Hi Paul, You may need to write an M function in order to do this (to change the variable name of the To Workspace logging variable underneath the subsystem block implementation when your block is copied). One... 30 Jun 2010 05:25

Simulation time
Hi there, I use Matlab 2010a under Mac OS X 10.6.4. Is there a way to know the simulation time when long simulation is running? Why there is no Status Bar in the Simulink Window? Regards, Ken ... 30 Jun 2010 05:25

Interpolation
HI friends, I have a big column matrix with 771 elements. I want to interpolate between every two rows so that my new matrix have 1541 elements in a single column. for example, my old matrix is A=[200 198 196 194.............771 elements] and my new matrix should be B=[200 199 198 197 196 195 194.... 30 Jun 2010 09:45

How to control the Colorbar/Colormap?
"Bui Yuki" <buihongha(a)gmail.com> wrote in message <hovloh$58k$1(a)fred.mathworks.com>... "us " <us(a)neurol.unizh.ch> wrote in message <hovl7l$o7q$1(a)fred.mathworks.com>... "Bui Yuki" <buihongha(a)gmail.com> wrote in message <hovkkt$ftk$1(a)fred.mathworks.com>... works as expected here (r2010a)... whic... 30 Jun 2010 04:20

how to select cells in uitable
i have an uitable with 1 or 2 columns and many rows. i need to select several rows or cells and write to variable. how can i do that? please help ... 30 Jun 2010 04:20

Problem with basic IO - there were no errors but the result wasn't apparent
Hello all, I tried to save my data in a text file and tried to save an image in a folder.In both the cases I got undesired results.Could any one write me where I went wrong. ==> To create a new directory I used mkdir(). status = mkdir('G:\firstdirectory') status value was 1.... 30 Jun 2010 03:15