How to select 6 elements from 9 in matrix 3x3 using block "Selector" in Simulink?

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Anastasiya Krivtsova 2015-6-19

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评论： Anastasiya Krivtsova 2015-6-19

How to select 6 elements from 9 in matrix 3x3 using block "Selector" in Simulink? I have a matrix like this: a11 a12 a13 a21 a22 a23 a31 a32 a33 and in Scope i have 9 lines. I want to select 6 elemets: a11 a12 a13 a22 a23 a33 in order to have 6 lines in Scope.

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Answer 1

Martin Butcher 2015-6-19

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Hi,

you can use the selector block, set the number of input dimensions to two, and set the indices as appropriate.

See example attached.

Martin

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Anastasiya Krivtsova 2015-6-19

Hi,

Sorry, i have no any attachement(

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Answer 2

Martin Butcher 2015-6-19

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twoDimensionalSelectorExample.mdl

File attached this time!

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Anastasiya Krivtsova 2015-6-19

Thanks. But can i select a triangular matrix from matrix 3x3 using the "Selector"?

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Answer 3

Martin Butcher 2015-6-19

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twoDimensionalSelectorExample2.mdl

I see I misread the details of your original question.

I don't think you can do this directly with a single selector block. You could use three selector blocks and mux the outputs, or you could reshape it from a 3x3 matrix to 9 element array and use a selector block for each element. I prefer the latter as it is tidier.

Example attached.

Enjoy.