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tlist(1) Scilab Function tlist(1)
NAME
tlist - Scilab object and typed list definition.
CALLING SEQUENCE
tlist(typ,a1,....an )
PARAMETERS
typ : Character string or vector of character strings
ai : any Scilab object (matrix, list,string...).
DESCRIPTION
Creates a typed-list with elements ai's. The typ argument specifies the
list type. Such typed-list allow the user to define new operations working
on these object through scilab functions. The only difference between
typed-list and list is the value of the type (16 instead of 15).
typ(1) specifies the list type (character string used to define soft coded
operations)
if specified typ(i) may give the i+1th element formal name
Standard Operations on list work similarly for typed-list:
eexxttrraaccttiioonn
: [x,y,z...]=l(v) where v is a vector of indices; [x,y,z]=l(:)
extracts all the elements.
iinnsseerrttiioonn
: l(i)=a
ddeelleettiioonn
: l(i)=null() removes the i-th element of the tlist l.
ddiissppllaayy
Moreover if typ(2:n+1) are specified, user may point elements by their
names
We give below examples where tlist are used.
Linear systems are represented by specific typed-list e.g. a linear system
[A,B,C,D] is represented by the tlist
Sys=tlist(['lss';'A';'B';'C';'D';'X0';'dt'],A,B,C,D,x0,'c') and this
specific list may be created by the function syslin.
Sys(2) or Sys('A') is the state-matrix and Sys('td') is the time domain
A rational matrix H is represented by the typed-list
H=tlist(['r';'num';'den';'dt'],Num,Den,[]) where Num and Den are two poly-
nomial matrices and a (e.g. continuous time) linear system with transfer
matrix H maybe created by syslin('c',H).
H(2) or H('num') is the transfer matrix numerator
SEE ALSO
null, percent, syslin, list
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