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Aide Scilab >> Chaînes de caractères > length


length of object

Calling Sequence

n = length(M)



a matrix (usual or polynomial or character string) or a list.


an integer or a matrix of integers.


For usual or polynomial matrix n is the integer equal to number of rows times number of columns of M. (Also valid for M a boolean matrix).

For matrices made of character strings (and in particular for a character string) length returns in n the length of entries of the matrix of character strings M.

The length of a list is the number of elements in the list (also given by size).

The length of a mlist is by default the number of elements in the mlist, but you can overload it (see example).

length('123') is 3. length([1,2;3,4]) is 4.

WARNING : length of a sparse matrix returns the max of dimensions and not the product of the dimensions. (For example: length(sparse(eye(12,2))) returns max(12,2) and not 24). Please use size(...,'*') with sparse matrix.


length([123 ; 456 ])
length(['hello world',SCI])
a = mlist(["myMlistT" "field1" "field2"],"aexample","bexampleb");
// returns 3 default behaviour if length not overloaded for mlist

// we create an overload function for mlist of type myMlistT
function r=%myMlistT_length(M)
    r = length(M.field1)

// returns 8 result of length(a.field1)

See Also

  • size — taille d'un objet


5.4.0 This function allows overloading for mlist type.
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Last updated:
Tue Apr 02 17:36:47 CEST 2013