Singular

5.2.1 apply

Syntax:

apply( expression , function );

Purpose:

applies the function to all elements of the first argument. The first argument must be of type intvec, intmat, or list. The result will be an expression list, its type and format will be set by the following assign. The function must be a kernel command or a procedure which takes one argument and returns a a value.

Example:

proc p(int x) {return(x^2);} intvec v=1,2,3; apply(v,p); ==> 1 4 9 intvec vv=apply(v,p);vv; ==> 1,4,9 list ll=apply(v,p);ll; ==> [1]: ==> 1 ==> [2]: ==> 4 ==> [3]: ==> 9