Matlab

fzero f(x) vs. fminbnd f(x)^2
I need to find the zero of a function, many times, actually, within a loop, in my code. I am looking to improve the performance. Is there any reason that minimizing the square of a function (using fminbnd say) could ever perform better than the search for a zero (using fzero say). -Ivan ... 18 Mar 2010 21:13

Using Matlab to analyze Raman spectroscopy scans
Hello- I am trying to analyze some Raman spectroscopy scans using Matlab with no success. My data is in (x,y) format, generating 5-7 peaks. I would like to line segments at the baseline of each peak as well as the length of the peaks and calculate the length of these line segments. I also need to calculate the area ... 17 Mar 2010 11:20

Image classification with wavelet packet features with neural network
sir, I have done wavelet packet decomposition for the texture image.And i extracted the features as energy from wavelet packet decomposed image subbands.Now i am planning to retrieve the images from the database using the energy feature vector as input.I am going to use Artificial neural network for image retrieval pr... 17 Mar 2010 11:20

Plotting to a raster image
I'm trying to plot some objects using the patch function to create synthetic images from which I can test an image processing algorithm. To run the image processing algorithm on the plotted image I need it to be in the form of a raster array with the correct dimensions (640x480). I know I can use getframe to capture th... 17 Mar 2010 12:28

Transparent pixels in images: outputing a .png file with transparent area
So it's really not possible to do it directly when creating and using imagesc? We have to save it in png to do that?:( Save the image to png using imwrite. You can then specify an alpha matte, as described here (parameter 'Alpha'): http://www.mathworks.com/access/helpdesk/help/techdoc/ref/imwrite.html#f25-742... 17 Mar 2010 11:20

video compression matlab code
Hi all, if any body have source code (m-files) for video compression using matlab that help me so much in my research. Thanx ... 17 Mar 2010 13:37

matrix search or comparison
Given a number and a vector of number data, if I would like to, as quickly and resource conservant as possible, find which number within the vector, or more importantly, which nth term it is, is there a specific command for this purpose? For example, a = 5.18, b = [1 2 3 -4 5 0 5.1 5.2 5.3 5.5 6 7 ... 18 Mar 2010 05:56

signal
how we can create an autoregressive model for a givin time-discrete signal, and calculate the coefficients for each element of the model? ... 17 Mar 2010 11:20

UnsatisfiedLinkError: Can't load library - conflict win32 and win64
"Ed Yu" <ekyu88(a)hotmail.com> wrote in message <gqbbqt$t50$1(a)fred.mathworks.com>... This probably has to do with JA builder's default references 32bit instead of 64bit. You'll have to read more about JA builder or contact mathworks tech support. Hi, I am having the same problem here. I am using a 64-bit JRE and a... 17 Mar 2010 11:20

Embedded Matlab Function: global matrix, RTW/RTWT
Hello, sorry for my English but i hope you can understand me. I want to you global matrix in Embedded Matlab Function in Simulink (i work with RTW/RTWT). First i am declaring global matrix (global_matrix) and then change settings in my simulink model: - global_matrix (input -> parameter) - check: save to workspa... 24 Mar 2010 21:39