Math Forum / Math Software / MATLAB / July 2008

I just renamed a gui file by using save as in guide, but
after that I get all kind of warnings in the matlab output
window with the old file name.
the warnings are:

I wonder if someone can help.  I've got data that is constantly updated being imported into matlab at the moment blank spaces for missing data are being filled with zeros I want to calculate the mean etc.. for these rows but do not want to lose the zeros sandwiched in the data by ...

Hi,This function is using symbolics to solve an equation with an integral
where the upper limit of the integral is the unknown. This is soooo slow,
and i have to find another method.Is this possible to do numeric ?function
b=warp(R,N) % make symbolicsyms x;syms r % Gaussian ...

I heard that the matlab way of object oriented programming is a little
clumsy. It may end up wrinting much more code in OO way than in
function way.
Matlab does not have the namespace mechanism as in C++ (let me know if

I'm trying to set analoginput device with NI 6034E card.
I use:
ai=analoginput('nidaq',1);
but get an error:

I'm trying to generate triggers at the start of specific times so I've
created a timer object. However, these specific times are created by
random variables. I have about 1000 nodes, each of which can generate
events at any time, so at any point in time, I can have several timer

I am interfacing a Computer Boards USB-1408FS to control a
digital device. (and - later- to read the analog output)
I can set up the device with
dio=digitalio('mxx',1)

If you can help with the following that would be very useful;
I have several interpolated surfaces of the same region, however they
are on slightly different grids (as the loess interpolation uses the
min and max of the data set) and so the X,Y positions vary. I want to

Hi, I'm pretty new to matlab and have only used really basic
aspects so far (mostly just graphing).  What I want to do
now is draw some density contours based on how many points
are plotted in an area of a graph.  I've been looking

I want to solve the parabolic equation for mass transport at
porous region for 1 dimensional. the problem is, im confuse
to set the initial and boundary condition for my system. my
system have 5 layer of porous region. Now, im try to solve

I want to use k-means algorithm to cluster about 500,000 points into
1000 clusters. Each point has a feature description of about 800
dimensions. I simply use the following command to do the clustering
but it runs very slowly and now I think maybe it will not finally

Hi, all:
I found a demo from Matlab at
http://www.mathworks.com/products/demos/image/cross_correlation/imreg.html
Simply, I copy all the code to command window, but it seems

Have some measured data points which should make up a
sinc-function.
How can I fit a a*sinc(b*x) to my data points?
Have understood how to estimate polynomials (which would be

I'm still learning Matlab and I was wondering if there is
better way of doing this specific task:
I want to transform an ordered row vector into a matrix in
which each row is a predetermined-sized partition of the

Hi, I have multiple text strings consisting of two words
separated with a "tab" looking something like below:
one    two
now how do you do to split this string to two separate