Math Forum / Math Software / MATLAB / July 2008

I'm reading a paper "Estimating Observation Functions in
Dynamical Systems using Unsupervised Regression" recently.
The authors claim that equation 7-9 in the paper can be
formulated as a generalize eigenvalue problem.

 I am still trying to solve a problem of removing NaN data
from my image created using geoshow. The NaN data is
visible as the lowest values from the colorbar. I changed
this to purple for better visualization:

1.  I have an n-dimension data.
2.  I could get the pdf of each one from each of their
histograms.
3.  Now I would like to get the joint pdf of the all the

I am trying to update the position of a camlight after using
rotate3d to rotate my patch data. The callback works if
rotate3d is off, but not while it is on. How can I make it
work while rotate3d is on so I don't have to turn off

when ever I try to execute the program below it gives the
following message:
--------
??? Attempted to access ev(1,3); index must be a positive

I have two GUI's saved in one folder. I want GUI_2 to start
when one of the button in GUI_1 is pressed. Please let me
know how this can be done...

Please kindly correct me if I'm wrong.  
I have two variables of the same length obtained from a
measurement: A and B.
I took the two dimensional power spectral density by:

What is the fastest way to compute 50000 random
permutations on 10 symbols?
I had thought evaluating Z(50000,10), where
Z = @(m,n) arrayfun(@(o) randperm(n), 1:m, 'UniformOutput',

Hi,
I have a quadratic objective function like this:
y=a_0+a_1*x_1+a_2*x_2+...+a_n*x_n
 +a_12*x_1*x_2+.....a_n-1,n*x_(n-1)*x_n+

I have a bunch of variables labled var1,var2,var3....
i tried to create a cell array as i was running through the
function but i kept getting an empty array before the
indexed number.  Such that:

I am trying to do plot an isosurface, but I don't want any
tick marks.  I have included the line:
set(gca,'XTick',[],'YTick',[],'ZTick',[]);
in my code, but the exponent (i.e. the x 10^-8 part) won't

I have two integers with different length:
int1 = 82;
int2 = 34563409;
Basically I would like to Xor them together but then Matlab yields

i need to multiply two matrices of A(17,111,132) and B(4,17) over k that s from 1 to 17 (the B matrix variable).
how can i do this calculation in matlab? i tried repmat but cound not be able to solve it.
thanks

i need to multiply two matrices of A(17,111,132) and B
(4,17) over k that s from 1 to 17 (the B matrix variable).
how can i do this calculation in matlab? i tried repmat
but cound not be able to solve it.

I'm new to Matlab so excuse me if this is a stupid question :)
Suppose I have X = [0 6 2 9 9 12 15]
And I want to get a vector which has ones for values between
3 and 10 and everything else a zero. So the new vector is then: