Signal dimensions of a bus in Simulink
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In Simulink (the new editor, 2012b), I have some nested buses containing only (arrays of) doubles and buses (which in turn only contain doubles). Actually, I have a lot of them. Now when I check Display|Signals&Ports|Signal Dimensions, and do Update, I get, for each bus the size. The strange thing however is that it is shown inconsistently: sometimes I only see a number, such as 6, sometimes I see a number followed by a number in braces, such as 6 {6}, or 57 {84}.
I found out that, in the latter case, the first number is the number of elements in the bus (sum of all sub-elements in case of nested bus), and the second is the number of doubles (they differ if any of the elements is an array).
My question is: why do I sometimes only see a number, and sometimes number plus number in braces?
Gijs van Oort
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Guy Rouleau
le 9 Jan 2013
I think your understanding is correct.
To verify that, go to the model configuration -> Diagnostics -> Connectivity
You will find 3 diagnostics controlling if Simulink can treat vectors as buses and vice-versa.
I introduce this and provide some background on why Simulink behaves this way here:
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