linus_utopia's articles:

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Sometimes Matlab's data-tip doesnot pop up, what's wrong? 0 18 (7/26/2007 2:48:07 AM) comp.soft-sys.matlab Hi all, This is my headache. In Matlab 2007a(I had the same problem before with previous versions of Matlab too), supposedly when I hover the mouse over a variable name in the ..m file in the Editor, it sho... Linus

How to vectorize and avoid this for loop to speed up? 5 29 (7/25/2007 4:07:41 AM) comp.soft-sys.matlab Hi all, When inside a loop, there is a vector operator(r and p) already, how to further vectorize it along another dimension (for "u" and "us")? Here is my code: --------------- tmp=zeros(size(us)); %pre-... Linus

Matlab cell mode doesn't allow breakpoint? 2 71 (7/25/2007 1:32:46 AM) comp.soft-sys.matlab Hi all, I have a cell mode program and it is divided into cells. I put a break-point in one cell segment of the program, and press CTRL+ENTER, the cell was executed, but the break-point didn't stop the exec... Linus

Is there a way to see the PLP number of the Matlab installed on my PC? 2 16 (7/25/2007 12:50:22 AM) comp.soft-sys.matlab Somebody else installed it and he's now gone. How do I find out it? I want to write it down and keep a good record of it and other stuff... Thanks! ... Linus

long waited feature -- does it exist in Matlab now(2007a)? #2 4 16 (7/21/2007 4:56:14 AM) comp.soft-sys.matlab Hi all, I believe this is a long-waited feature. But does it exist currently in 2007a? -------------------- You have a long simulation, which runs possibly for days, in the middle, you just want to hit th... Linus

long waited feature -- does it exist in Matlab now(2007a)? 0 18 (7/21/2007 4:56:03 AM) comp.soft-sys.matlab Hi all, I believe this is a long-waited feature. But does it exist currently in 2007a? -------------------- You have a long simulation, which runs possibly for days, in the middle, you just want to hit th... Linus

Is it possible to write it without a loop? 8 33 (7/19/2007 4:54:05 AM) comp.soft-sys.matlab Hi all, I want to get rid of "for" loop and speed up the code: ---------------------- for i=1:N; for j=1:M; t=S(i, j); %look "t" up in the cell array T{i}, where for each i, T{i} is an... Linus

Are there good optimization solvers for cross entropy minimization problem? 3 22 (7/19/2007 4:30:40 AM) comp.lang.fortran HI all, For an optimization problem that is a weighted combination of cross entropy minimization and sum of least squares, are there good solvers specially designed for such problems? I've seen entropy minim... Linus

something like a convolution... seeking advice on Matlab vectorization tricks -- how to speed up? 18 11 (7/19/2007 4:21:00 AM) comp.soft-sys.matlab Hi all, I often met with the following recursive structures in my Matlab programming, which are unpleasant and slow. For example, the following build a 2D matrix for Tt. The size of the matrix Tt is N x M.... Linus

what good optimizers are available for convex optimization problems? 14 37 (7/14/2007 1:33:03 AM) comp.soft-sys.matlab What good optimizers are available for convex optimization problems? Hi all, My optimization problem is a convex one. It has tens of variables. I am currently using Matlab's "fmincon" (the constrained optimi... Linus

linus_utopia's replies:

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how to convert this line of Matlab code into Fortran? 6 42 (7/8/2007 4:08:47 AM) comp.lang.fortran Hi all, In my Matlab code, I have the following function call: y=maple('binomial', h, n+1); where "h" is in fact a negative irrational number(that's why we use maple to help), "n" is a positive integer. No... linus_utopia (52)

why cannot I print in a Fortran mex program? 3 33 (7/8/2007 7:11:51 PM) comp.lang.fortran HI all, I compiled some simple examples from Matlab API for calling Fotran mex files from within Matlab. I added "Print *, C" to show the result of my variable as debugging information. But surprisingly, t... linus_utopia (52)

How to detect turning points in curves... 24 37 (7/13/2007 1:26:39 AM) comp.soft-sys.matlab How to detect turning points in curves Hi all, If you take a look at the following plot, http://img63.imageshack.us/img63/5050/gggyt1.jpg You will agree with me that there are two turning points. But is th... linus_utopia (52)

what good optimizers are available for convex optimization problems? 14 37 (7/14/2007 1:33:03 AM) comp.soft-sys.matlab What good optimizers are available for convex optimization problems? Hi all, My optimization problem is a convex one. It has tens of variables. I am currently using Matlab's "fmincon" (the constrained optimi... linus_utopia (52)

something like a convolution... seeking advice on Matlab vectorization tricks -- how to speed up? 18 11 (7/19/2007 4:21:00 AM) comp.soft-sys.matlab Hi all, I often met with the following recursive structures in my Matlab programming, which are unpleasant and slow. For example, the following build a 2D matrix for Tt. The size of the matrix Tt is N x M.... linus_utopia (52)

Are there good optimization solvers for cross entropy minimization problem? 3 22 (7/19/2007 4:30:40 AM) comp.lang.fortran HI all, For an optimization problem that is a weighted combination of cross entropy minimization and sum of least squares, are there good solvers specially designed for such problems? I've seen entropy minim... linus_utopia (52)

Is it possible to write it without a loop? 8 33 (7/19/2007 4:54:05 AM) comp.soft-sys.matlab Hi all, I want to get rid of "for" loop and speed up the code: ---------------------- for i=1:N; for j=1:M; t=S(i, j); %look "t" up in the cell array T{i}, where for each i, T{i} is an... linus_utopia (52)

long waited feature -- does it exist in Matlab now(2007a)? #2 4 16 (7/21/2007 4:56:14 AM) comp.soft-sys.matlab Hi all, I believe this is a long-waited feature. But does it exist currently in 2007a? -------------------- You have a long simulation, which runs possibly for days, in the middle, you just want to hit th... linus_utopia (52)

Matlab cell mode doesn't allow breakpoint? 2 71 (7/25/2007 1:32:46 AM) comp.soft-sys.matlab Hi all, I have a cell mode program and it is divided into cells. I put a break-point in one cell segment of the program, and press CTRL+ENTER, the cell was executed, but the break-point didn't stop the exec... linus_utopia (52)

How to vectorize and avoid this for loop to speed up? 5 29 (7/25/2007 4:07:41 AM) comp.soft-sys.matlab Hi all, When inside a loop, there is a vector operator(r and p) already, how to further vectorize it along another dimension (for "u" and "us")? Here is my code: --------------- tmp=zeros(size(us)); %pre-... linus_utopia (52)