Matlab

Image processing-image enhancement
I am working on image contrast enhancement using wavelets. I need help regarding the code for Contrast measure in DWT. ... 23 Mar 2010 06:43

program to solve Gaussian elimination without matrices
my code below doesn't do the trick for the gaussian elimination. The B(i) entries are growing, and the error comes from the elimination step (the first one) and that introduces an error into the result. if i use matrices i can get it but i am not allowed to use matrices. can someone tell what i am doing wrong? ... 23 Mar 2010 00:07

MATLAB's xdr support
Does MATLAB have any native support for binary files created using the XDR format? Is it possible to read XDR format files with fread() or something like that? If not, is there external toolboxes that does such a thing? ... 23 Mar 2010 00:07

Hessian matrix for Image Analysis
Hi, I am working on quantification of fiber orientation via image analysis. I found a paper http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2690830/ where they used Hessian matrix to find the principal curvature of the fiber in image. I could reproduce the process up to the point where it requires Hessian matrix. Could som... 22 Mar 2010 22:59

undefined variable error message
This is my code: function theVal = dumb(beta,Y,X) err=Y-X*beta; err=abs(err); theVal=sum(err); end when I run it, I get the message ??? Input argument "Y" is undefined. Error in ==> dumb at 3 err=Y-X*beta; any help? thanks why does this error message appear in general? ... 23 Mar 2010 08:57

mex command
Hello everybody, I am trying to install HSPICE toolbox and i am using windows seven. Referring to the setup manual, it mentioned that : Platform Compatibility All files should work across different computer platforms, though the loadsig mexfile may need to be recompiled. It is currently compiled for Sun, Redhat L... 23 Mar 2010 14:46

Control PCI board form MATLAB
Hello, My DAQ PCI-Board (Keithley KPCI-3103A) is connected to an Ultrasonic Card, with an Analog Output and Digital IOs, i can read the Analog Output of the Sensor(Ultrasonic Dual Use), but it´s not significant cause I must control the Sensor to Send or recieve with the Digital Outputs from Matlab through the PCI bo... 22 Mar 2010 19:13

Need help creating a gridded file for boundary id numbers.
I would appreciate some help in what seems to be a simple problem that I'm having a lot of trouble with. I have longitude and latitude in gridded files. ( Along with a bevy of other gridded files like land/sea masks, bathymetry, etc.) I need to be able to read in a long x lat file that defines a boundary or region of... 23 Mar 2010 14:46

MARS: Multivariate adaptive regression splines
Does Matlab provide a function capable of doing something similar to MARS (http://en.wikipedia.org/wiki/Multivariate_adaptive_regression_splines)? ... 22 Mar 2010 18:02

Problem using 'fi' with 'hex'
Hi I am using MATLAB7.0.0.19920(R14) and am facing a problem using fixed point toolbox. The command I have used are shown: b=fi('hex','0001','signed',0,'Wordlength',32,'Fractionlength',16) b = 3.0518e-005 DataType: Fixed Scaling: BinaryPoint Signed: f... 23 Mar 2010 11:16