Unable to use "cholupdate" in a Simulink Matlab function made for C code generation
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I have made a model in Simulink that contains a Matlab function block. When I try to use "cholupdate" I only get the following error: "Undefined function or variable 'cholupdate'."
Is it not possible to use cholupdate in a Simulink Matlab function (made for automatic C code generation)? I use Matlab R2013a and I can use cholupdate outside of Simulink.
"Chol" seems to work and I also get the help text for cholupdate in the editor.
If it is not possible to use cholupdate I would appreciate if someone could show me / post a link on how to implement it myself! I am looking for the Cholesky factor of then rank 1 downdate.
回答（2 个）
Ryan Livingston
2013-8-1
0 个投票
CHOLUPDATE is not supported for code generation. You can see an exhaustive list of functions which are supported here:
Mohd Aifaa
2013-10-9
0 个投票
try this for cholesky factor rank 1 update/downdate without using cholupdate
R1=chol(R'*R+x*x'); (update) R1=chol(R'*R-x*x'); (downdate)
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2013-10-9
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