1 type
type    string  3
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2 state matrix
a       matrix  nstate  nstate
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3 input matrix
b       matrix  nstate  nin
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4 output matrix
c       matrix  nout    nstate
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5 direct tranfert matrix
d       matrix  nout    nin
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6 initial state
x0      column  nstate
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7 time domain
t       any
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8 names
names	string	4
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