Calculate vector norm in Simulink?
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Is there a block that finds the norm of a vector in simulink? I haven't found the equivalent to norm(v) from MATLAB.
Thanks!
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Accepted Answer
Jon
on 8 Apr 2013
You can use the dot product block (with the same vector wired to both inputs) followed by a square root. Both are under the Math Operations library. I think the previously suggested abs block computes the absolute values of each element of the input vector.
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More Answers (4)
Youssef Khmou
on 8 Apr 2013
hi, it does exist, its called "abs" , open Simulink library and go to :"Math operations" block , its the first on the list, with notation u : ABS
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Jon
on 8 Apr 2013
As noted in my alternative answer, I don't this this gives you what you want. As far as I can tell abs gives the element wise absolute values, not the norm
Youssef Khmou
on 8 Apr 2013
hi, if the first answer does not work, you can use other ways, like :
1) go to " User Defined Functions" in Simulink Block .
2) choose "f(u)" FCN, add it to your file , right click on it you will find the default value :
sin(u(1)*exp(2.3*(-u(2))))
change it to
"norm(u)"
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Jon
on 9 Apr 2013
I couldn't find and "Embeded function" Do you mean the Interpreted MATLAB Fcn under User Defined Functions? The Interpreted MATLAB Fcn works, but I would guess that the dot product block, followed by the sqrt block is faster, because it doesn't need to be interpreted.
DEBASISH MISHRA
on 9 Aug 2019
Hi,
You may direct use matrix 1-norms from dsp tool box.
Thanks
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