Math Forum / Math Software / MATLAB / July 2008

i am trying to built a namespace for some of the mathlab function and
i find some problem
my first problem is the function
feval.m

I am new to matlab so I dont have that much experience. I
designed a GUI with two buttons and a text box. The user
inserts the name of the file in the textbox and by clicking
pushbutton1 a plotting code is executed plotting the data

Some advice would be great if anyone knows about this...
I have a Simulink model, made up largely of SimMechanics blocks. I am
running it for very short time-steps, thousands of times. As such,
running it just in the Simulink window is painfully slow.

I build several interface for calculate my system. but, I
can't used the data that im enter at the first interface to
the other interface.Means, if I to used the second interface
for example, I have to re-enter again the data. can I just

Suppose an m-file "xSquare" which plots the square
and logarithm of an input vector.  Note that there are two
axes in the the figure window. :

I have this huge list of data where I have to choose the
single maturity at a time to make surface.
Anyone has any idea how I can choose one maturity at a time
from the datafile after loading the data and sorting them

I need to optimize a 3x3 Matrix M. The cost function is
f(k1,k2,....,k9) with k1...k9 are the entries of M.
I need to set a constrain on k1,...k9 such that for all vectors [ a b
c] where  0<=a<=255;  0<=b<=255; 0<=c<=255; a, b, and c are integers,

anybody have an example of programming robot path planning
using genetic algorithm..i mean the source code..i start
already by i stuck on how to represent the grid map with
node and how to initialize the random population from

I have an array of dimension: 1 x 64 x 16
Instead of having the above 3D array, I want the same data to be in a
2D array of dimension: 64 x 16
I need this because I want to use a mesh plot and it works only on a

I would like to know whether it is possible to plot a real
time graph from serial port input.
I have written the code, but it seems the data is not
plotting real time. I understand that the data is stored in

Hi everyone -
I have what seems to be a simple problem - I'd like to
control a GUI from an interactive script.  I know it can't
be too hard, but I haven't looked in the right place yet.

I want to Plot a Matrix (10x20), with 0, 1 or 2 in each
field. I used scatter, to get each type of Matrix-entry in a
different color, but my problem is that I cannot choose wich
colors the Points appear in (the matrix represents cells, 0

I was trying to write wrapper for audiorecorder. Below is my
code:
------------------
classdef Audio

this loop should give me for -1 0 and for 1 should give me
a 1, can anyone help me. My code is at the bottom
thanks
p=[-1.0000 1.0000 -1.0000 -1.0000 -1.0000 -1.0000 1.0000

I have a GUI which has graphs in it.
Unfortunately i am neither being able to change the label of
any of the axis ( i have three axis for each graph) nor am i
being able to change the axis dimensions.