Math Forum / Math Software / MATLAB / July 2008

Does any one know how to fit data of the following type:
x - column of real numbers (first independent variable)
y - column of real numbers (second independent variable)
f - dependent variable, also a column of real numbers

I would like a function similar to the rnd function but I
want the generated numbers to be weighted, i.e. I would like
the function to be more likely to give me a higher number
than a lower number and I would like to be able to specify

Say there is the following function:
func(a,b,c,d,e,f)
only argument a is required.  What if I want b to be the default, but give c a definite value?  How do I call the function?  I tried:
func(a, ,c)

I am a bit stuck with this
My array looks like this
[4]
[3]

histc counts from a (incl) to b (exclusive). Is there anyway to define the edges to a (excl) to b (inclusive)?

What scheme uses the gradient function in matlab for
approximate derivatives?
I need to compute 1st and 2nd order derivative of a
discrete data on a rectangular domain on equall spaced

Hi everyone, I am trying to use splines. I understand that if there are n coefficients to determine, n-2 conditions are common to all splines but 2 of them may change.
which are those 2 used by matlab?
what are the not-a-knot end conditions?
many thanks

Hi, I am having trouble vectorising the below for loop. Can
anyone help me please? I am expecting M to consist of 3 rows
of 2x2 matrices each with 16 deep. Thanks in advance.
for p=1:3

Dear all friends;
I am solving single objective minimization problem having
150 decision variables and 144 constraints. The probem is
solved by conventional method Linear programming (Linprob

I tried to use the command function of train. Reading the
Neural Network Toolbox™ 6 User’s Guide, on page 1-26 and
1-27 it refered that after running train function Matlabs
automatically opens neural network training. When i tried

I have a rectangular domain and equally spaced points on
this domain. At each point I have some variables
(velocity , temperature etc..)
I want to evaluate  integral

Hi,
I am fairly new to creating GUIs.  I wanted to manipulate
certain parameters in my Simulink simulation from my GUI.  
The only way I can think of doing this, is by pausing the

Hi ppl.
I saw this project (Mesh2D V23) in File Exchange area and
it's great, however, i have some doubts...
First off, i don't understand why there is a "connectivity"

How to put a default value of the callback if it's not being
called? so that there is always a value even it's not being
used. Like this?
function  answer_nochange_Callback(hObject, eventdata, handles)

In Gui, how do I command the callback function to go to the
next function?
For example, when I first press the button, it will go to this,
function answer_faster_Callback(hObject, eventdata, handles)