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Jason


Active since 2011

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Question


Highly variable execution time of mex file
Hello, I am running an EM type minimization where the E step is essentially a Kalman filter+smoother with a few minor additio...

10 years ago | 2 answers | 0

2

answers

Answered
Testing for a non-zero linear trend.
Yes that is correct as long as the constant vector is included. Else the F is not valid. You can also use regstats for other ...

10 years ago | 0

Question


Is there a fast rank k cholupdate?
Is there/will there be a rank k update to a cholesky factor? LAPACK has a symmetric rank k (but not cholupdate that I can find) ...

11 years ago | 0 answers | 0

0

answers

Question


Sparse and nonspare QR
I have question regarding the difference between the sparse and non-sparse QR as implimented R2012b. I have a matrix, X, that i...

11 years ago | 3 answers | 0

3

answers

Question


In a Mex file, a for loop goes beyond the relational expression?
I keep getting a crash in a mex file. I have no clue why there is a problem other than using mwSize instead of something else. ...

11 years ago | 1 answer | 0

1

answer

Question


error (rounding or user) in simple math op
I just noticed odd behavior in R2012b that really seems like an error though perhaps I'm making a foolish error? I enter the ...

11 years ago | 2 answers | 0

2

answers

Answered
lost access to tf and ss from id toolbox
Rajiv, We do not have the control system toolbox, only the system identification toolbox: System Identification Toolbox ...

11 years ago | 0

Question


lost access to tf and ss from id toolbox
Hello, I seem to have lost access to tf and ss (at least) from the sysident toolbox at the command line. If I type ss or tf a...

11 years ago | 2 answers | 0

2

answers

Question


specifying state space models in SysID toolbox
Hello, I am new to the sysid toolbox and want to see if it is worth the effort. I would like to "import" state space models ide...

11 years ago | 2 answers | 0

2

answers

Question


mexAtExit and static variables
I have a quick question regarding static variables in mex files. Basically it is not behaving as I expected. However I'm not a p...

12 years ago | 2 answers | 0

2

answers