Answered
Is there known relationship between eigenvalues of covariance matrix and correlation matrix?
The documentation for <http://www.mathworks.com/help/techdoc/ref/corrcoef.html corrcoef> describes the relationship between the ...

14 years ago | 0

Answered
Triple Integration without Symbolic Math Toolbox
The first thing you need to do is rewrite this as a <http://www.mathworks.com/help/techdoc/ref/function.html function> with the ...

14 years ago | 0

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Answered
Multivariate Guassian Distribution
You're really trying to do two things here. The first is, you have some random data and you want to fit it to a multivariate nor...

14 years ago | 1

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PCA values
Eigenvectors are a little arbitrary. If |A| is a matrix and |b| is one of its eigenvectors, then so is |b| multiplied by any sca...

14 years ago | 0

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Matrix Independance
You can use <http://www.mathworks.com/help/techdoc/ref/rank.html rank>.

14 years ago | 0

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purpose of a period in a var set/equation ?
With the dot, it indicates element-by-element multiplication instead of matrix multiplication. See <http://www.mathworks.com/hel...

14 years ago | 0

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Excessive Run Time For back solve of 'huge' symbolic matrices.
Do you really need the symbolic answer? It's probably very complicated, and not very edifying. You could create a function that ...

14 years ago | 0

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Answered
Problem with 4-d integral i MatLab
You can insert a single integral as an argument in |triplequad|: zmin=-tau_m; zmax=tau_m; f1 = @(r,z1,z2) quadv(@(z) intgn...

14 years ago | 0

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Answered
how to find t-score
If you mean the score on the t test, you can use <http://www.mathworks.com/help/toolbox/stats/ttest.html ttest>.

14 years ago | 0

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3d plot
See <http://www.mathworks.com/products/matlab/demos.html?file=/products/demos/shipping/matlab/demoDelaunayTri.html#3 Create and ...

14 years ago | 0

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Answered
OOP in Matlab: Why can't methods access properties directly?
If I understand your problem correctly, you could make |SetOfPoints| into an object array, where each element ( _e.g.,_ |SetOfPo...

14 years ago | 1

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Answered
Connecting lines in 3-d Graph
If you want to combine (c,b,a) and (e,f,d) into a single line, you can do the following: x = [c; e]; y = [b; f]; z = [a; d]...

14 years ago | 0

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Data size mismatch..
The function |mle| expects |data| to be a vector. Use p = mle(data(:,2), ... instead of p = mle(data, ...

15 years ago | 0

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Answered
converting yyyymmdd date to matlab date number
For each date, use a command like this: datestr(datenum('19940127','yyyymmdd'),'mm/dd/yyyy')

15 years ago | 3

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The curve in 3 dimensional space fitting.
You could fit a polynomial THRESHOLD(ALFA,BETA) using the File Exchange function <http://www.mathworks.com/matlabcentral/fileexc...

15 years ago | 0

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How to do curve fitting with two variables (using lsqcurvefit )
What you need is the <http://www.mathworks.com/help/toolbox/curvefit/sftool.html Surface fitting tool>.

15 years ago | 0

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The curve in 3 dimensional space fitting.
Let's back up a step. I think what you are trying to do is estimate the parameters of a generalized Pareto distribution for a si...

15 years ago | 1

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all simple paths problem
The package <http://www.mathworks.com/matlabcentral/fileexchange/24134 gaimc> implements the breadth-first search mentioned in y...

15 years ago | 0

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Answered
Extracting a rotation axis from a rotation matrix
tol = 100*eps; i = find(abs(diag(D)-1)<tol); rotAxis = V(:,i); (Edited to take rounding error into account. Increase |tol...

15 years ago | 1

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Answered
Call superclass method without knowing name of superclass?
How about just wrapping the call in its own method? If you'll forgive a little Monty Python whimsy, suppose your overloaded meth...

15 years ago | 0

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Matlab with MacBook Air
Some follow-up thoughts: I think the most important comment that Walter made was "compared to what?" To which I would add, "For ...

15 years ago | 0

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Matlab with MacBook Air
Here are some benchmarks I obtained using <http://www.mathworks.com/matlabcentral/fileexchange/1836 bench>. Note that my Mac Boo...

15 years ago | 2

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Call superclass method without knowing name of superclass?
I can't think of a good way to use dynamic superclass names, and it sounds like bad programming practice to me. Here is a di...

15 years ago | 0

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Help with "find" (possibly inside of "eval"?)
Read <http://www.mit.edu/~pwb/cssm/matlab-faq_4.html#evalcell this FAQ>.

15 years ago | 0

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Direct Solver
You need to make your matrix explicitly sparse, using commands like <http://www.mathworks.com/help/techdoc/ref/sparse.html spars...

15 years ago | 0

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Creating 2d grid from cell array of data points
If your cell array is |c|, you could use x = cell2mat(c(:)); plot(x(:,1),x(:,2),'.') The colon operator in |c(:)| makes |c...

15 years ago | 0

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Hatching a region between two functions
To fill the region between lines with a color, you could use a command like patch([x; flipud(x)],[f; flipud(g)],'r') The...

15 years ago | 1

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Fourier Transform of 2d
Unless there is an essential property of the centroid distance shape descriptor that you haven't mentioned, you could approach t...

15 years ago | 0

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Plot 3d graphs of a 2D gaussian function
If the above data are copied into a file |2dGaussianData.dat|, the following code can give you the surface you want: A = im...

15 years ago | 1

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Intermediate variables value at the optimisation achievement
The newsgroup thread <http://www.mathworks.com/matlabcentral/newsreader/view_thread/125572 Intermediate results of Optimization>...

15 years ago | 0