$LastChangedDate$tlist Scilab object and typed list definition. Calling Sequencetlist(typ,a1,....an )ArgumentstypCharacter string or vector of character stringsai
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:
extraction
: [x,y,z...]=l(v) where v is a vector of indices;
[x,y,z]=l(:) extracts all the elements.
insertion
: l(i)=a
deletion : l(i)=null() removes the i-th
element of the tlist l. Note that the
semantics of l.x=null() is undefined, but a
definition can be given through the overloading mechanism.
display
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), Sys('A') or Sys.A is the state-matrix and Sys('dt') or Sys.dt is the time domain
A rational matrix H is represented by the typed-listH=rlist(Num,Den,[]) where Num and Den are two
polynomial matrices and a (e.g. continuous time) linear system with
transfer matrix H maybe created by syslin('c',H).
H(2), H('num') or H.num is the transfer matrix numerator
Examples f(1)
mprintf("Displaying a tlist of type: %s\n", typeof(mytlist));
mprintf("\n");
mprintf("-- Field ''%s'' --\n", f(1));
mprintf("Contents: %s\n", sci2exp(mytlist(f(1))));
mprintf("\n");
mprintf("-- Field ''%s'' --\n", f(2));
mprintf("Contents: %s\n", sci2exp(mytlist(f(2))));
endfunction
// Display using overloading function
disp(t)
]]>See Also
percent
syslin
list
mlist