Parameters

Description

mlist object are very similar to tlist objects. The only difference concerns the extraction and insertion syntax: if M is an mlist, for any index i which is not a field name, M(i) is no more the ith field of the list.

The semantic of the extraction and insertion syntax should be given by an overloading functions.

The overloading function for extraction syntax b=a(i1,...,in) has the following calling sequence: b=%<type_of_a>_e_(i1,...,in,a)

and the syntax [x1,..,xm]=a(i1,...,in) has the following calling sequence: [x1,..,xm]=%<type_of_a>_e_(i1,...,in,a)

The overloading function associated to the insertion syntax a(i1,...,in)=b has the following calling sequence: a=%<type_of_b>_i_<type_of_a>(i1,...,in,b,a).

mlist fields must then be designed by their names. They can also be handled using the getfield and setfield functions.

Examples

M=mlist(['V','name','value'],['a','b';'c' 'd'],[1 2; 3 4]);
//define display
function %V_p(M),disp(M.name+':'+string(M.value)),endfunction

//define extraction operation
function r=%V_e(varargin)
   M=varargin($)
   r=mlist(['V','name','value'],M.name(varargin(1:$-1)),M.value(varargin(1:$-1)))
endfunction
M(2,:) // the second row of  M
M.value

//define insertion operations
function M=%V_i_V(varargin)
   M=varargin($)
   N=varargin($-1)
   M.value(varargin(1:$-2))=N.value
   M.name(varargin(1:$-2))=N.name
endfunction
M(1,1)=M(2,2)

function M=%s_i_V(varargin) //insertion of a regular matrix into a V matrix
   M=varargin($)
   N=varargin($-1)
   M.value(varargin(1:$-2))=N
   M.name(varargin(1:$-2))=emptystr(N)
endfunction
M(1,1)=44



//tlist case
M=tlist(['V','name','value'],['a','b';'c' 'd'],[1 2; 3 4]);
M(2)
M(2)='a'+string([1 2;3 4])


M('name')




  

See Also