Math Forum / Math Software / MATLAB / February 2010

I have few likelihood functions prewritten. I try to optimize them through "fmincon" function. For my estimated parameters, I then want to find the Hessian computed at those values. Once I get the Hessian I am interested in taking the inverse of the hessian multiplied by minus, ...

http://www.mathworks.com/matlabcentral/fileexchange/authors/30860
Just curious where all the files went.  Anyone know what happened?  Has there been some sort of crackdown?

I have a netcdf file with .nc extension. I don't know the content of the file..I would like to open the file using matlab. Is there any function developed by anyone to open netcdf file?
Sagar

How does one export a PDF image in matlab in such a way that the PDF won't have extra white space?  In other words, auto-crop the PDF so only the image appears and not an entire PDF page with the image in the center.
I'm trying to import these images professionally into latex ...

how to get the name of a variable and assign it as a string to a new variable?
Thanks!

i am new to the world of Image & Video Processing .. i read a lot about video processing and object tracking using Matlab but still not able to track objects or to plot rectangle around the moving objects ..
i am planning on using subtraction of two images and detect the ...

Hi, I'm very new to MATLAB, and I'm creating a function that approximates the degree of exactness of any numerical integration quadrature formula (given n+1 quadrature weights and quadrature nodes). But that part isn't all that relevant. My program basically cycles up the ...

i have a really big file and i don't want to load it all at once.
that is why i'm looking for a way to get the same information as size(data) gives me, but only without opening the file. i know the function dir can give me the number of bytes in the file, but it's not the same as ...

Dear matlab users
I have a GUI with some checkboxes. I want that when I checks a checkbox the function
UserClickedCheckbox detect the string of the checboxes that are checked and stores the strings in the cellarray checkboxnames.
In the code under I have a callback function for ...

There is still an error when debugging the file.
??? Error: File: C:\MATLAB6p1\work\polyfitn.m Line: 141 Column: 24
Expected a variable, function, or constant, found "|".
Could you fix it?

I want to make a graph where I want to set the interval along x-axis of a specific width e.g.
set(gca,'xtick',0:5:100) will only put values along x-axis in a form 0 5 10 15 ,,,, 100
but this will not help me in changing the width of interval between 0 and 5 or between 5 and 10 etc ...

I am trying to figure out a way to plot a 3d surface in matlab.
There are lots of data x and y,z is indepentent of x and y. I only
want to plot a circle surface with the conditions:
x^2+y^2<=25

I'm trying to figure out how to calculate the volume under a surface created with surf(X,Y,Z). Here is the code I'm using for the surface:
clear all
B = ((rand(50,1)-0.5)*50)+90;
C = ((rand(50,1)-0.5)*30)+90;

I am trying to figure out a way to plot a 3d surface in matlab.
There are lots of data x and y,z is indepentent of x and y. I only
want to plot a circle surface with the conditions:
x^2+y^2<=25

The image on http://bit.ly/caTTrb shows the parameters to sample from an inverse-Wishart distribution (this post is about the second part including psi). This is useful when you want to obtain a covariance matrix for a multivariate Gaussian distribution when the mean is known ...