Matlab

xlswrite complaining about locked file
http://www.mathworks.ch/matlabcentral/newsreader/create_message I have a Matlab program that makes several sequential xlswrite statements to an Excel 2007 spreadsheet (*.xlsx file) . Even though the spreadsheet is closed and no other process is (or, appears to be) using it, I get an error message after xlswrite ... 9 Apr 2010 14:30

jpeg2000
I need the source code for jpeg2000 (to encode and decode a file ando also codify in a bitstream)on matlab, please send me via this mail. Thanks! ... 9 Apr 2010 14:29

MATLAB Ode45 needing help
I am using the MATLAB Ode45 Solver to write a computer programme. I am required to obtain a numerical answer to an O.D.E with an accuracy of 6 decimal places: however, I am rather confused about what I should set as the step-size(doesn't ode45 use a 4th order numerical method, so the global error is of O(h^4)? Also... 14 Apr 2010 07:40

Fitting ellipses with dispersion
Hello, I am using a ellipse fitting program. The one made by Tal Hendel, I need to have the: semimajor_axis, semiminor_axis, x0, y0, phi with dispersion (the fitting errors). How can I do to obtain these parameters? ... 9 Apr 2010 14:30

Rounding error amplification in matrix/matrix multiplication
Hello, I am currently working on my own implementation in C++ of Strassen's fast matrix multiplication algorithm. It works actually pretty well. What I do now is unit testing (cppunit), where I use Matlab as a golden standard. Everything works fine, except for big matrices full of big float numbers. Neither my new a... 12 Apr 2010 11:24

using mex/fftw for "xcorr", faster than 2010A "xcorr"
I built a mex version of "xcorr" that uses the FFTW library. I'm basically doing the same thing as Matlab "xcorr" (zero-pad 2 arrays to next pow-2, run fft on these arrays, multiply, run ifft on result). Within the C-program, I'm relying on "fftw_plan_dft_r2c_1d" and "...c2r..." to perform the computation. I'm not d... 15 Apr 2010 06:55

to to change color from gray to skin?
AOA! The thing i want to do, that i have a image with white background and a gray face image on that which of course have different shades of gray i want to change that gray color in skin but the shades must remain same on the skin color as the shades are required to define the features of the face? how can i do th... 9 Apr 2010 18:58

how to display an HSV image?
AOA! When ever i try to display an hsv image converted from rgb to HSV through rgb2hsv the color of the picture no more remain as the orignal. i m trying to change the colormap but no effect? Thanks Regards. ... 9 Apr 2010 15:37

Warning: Name is nonexistent or not a directory: C:\Program
"Ulrich" <millim1974(a)yahoo.com> wrote in message <golg0d$cvr$1(a)fred.mathworks.com>... When I am trying to compile a matlab source with >mcc I get: Warning: Name is nonexistent or not a directory: C:\Program Files\MATLAB\R2008b\toolbox\compiler\patch. Warning: Name is nonexistent or not a directory: C... 9 Apr 2010 13:23

Saving Matlab Plots for Webpages
Hello, I am trying to save Matlab plots for putting it on web pages. I am struggling to save them in a perfect way, so that they look as good as the images on Matlab website itself (e.g. http://www.mathworks.com/access/helpdesk/help/techdoc/ref/plot.html). I saw that Matlab website publishes images in gif format ... 12 Apr 2010 09:10