Math Forum / Math Software / MATLAB / July 2008

I am working with electrical networks using
SimPowerSystems. I have to perform a mathematical
operation on current and voltage and then feed back to the
network. I am facing issue with connectors as the

Im usng MATLAB 7
My problem is that i want to control the radiobutton visibility if any
arbitrary radiobutton is selected.
I need to do this using some code

Suppose you have two matrices, A, B.
Each with two columns, first column revenue, second is
time. Each revenue row represent a customer you can serve
and make money. The time is when these customer requests

I would like to plot 3D data using GUI in matlab7.5. The 3 choices of
plot that the user gets to make are XY,YZ and ZX and this is
implemented using radiobutton. Upon selecting any 1 choice, the figure
should display the corresponding varialbles ie., 1 for XY, 2 for YZ

interpn is giving me NaN for values out of range.
I tried the option extrap with different methods but it hasn't worked.
it gives me NaN or "Wrong number of input arguments or some dimension of V is less than 2"
any help is really appreciated!!!

I am sure that I found a bug in 2008A. However, I do not know how to
report it to Mathworks.
This bug is descriped in detail at
http://groups.google.com/group/comp.soft-sys.matlab/browse_thread/thread/a72616d
d79f681e9#

I have a dataset. i like to classify this data into two
classes (class A, class B).
i devide the data into three parts: training, valdiating,
testing.

I'm running an image processing algorithm to detect runway markers
from a camera located onboard a UAV.
Instead of using a fixed timestep between image frames, I just run an
infinite loop and get an image from the camera at the start of the

As I'm continuing to learn Matlab and testing different
matrix manipulations, I came up with an algorithm to do a
specific matrix "reshape" I needed.
Let's say the initial s matrix is:

Below is my experiment - I actually expected the opposite!

Elapsed time is 0.003197 seconds.

   I have a matrix with 25 columns ans 486 rows. I want
the mean of all columns. I want to sum all values of the
first row, second row....486 row. The final result I want a
matrix with 1 column and 486 rows, the matrix are the mean

Hello,
How do I store data after the users press the "Push Button"?
Basically what I'm doing is, the users will be asked to
click on the "Play" button for the audio, then they will be

I would like to create a matrix where one row is a shifted
version of the previous one, like this:
M=[0 1 0 1 0;0 0 1 0 1;0 0 0 1 0; 0 0 0 0 1;0 0 0 0 0]
The second row is the first row shifted to the right and

I have an original predictor matrix X0 with
size(X0) = [ m n0]
I'd like to perform the
linear-coefficient/quadratic-variable regression

I am using the push button to recieve data(each time you
push it pull in data) but there is an issue... if you click
it really fast more than once the data seems to "back up"
and might plot twice in one spot.  I plan on taking 36 data