mirror of
https://github.com/lcn2/calc.git
synced 2025-08-16 01:03:29 +03:00
42 lines
886 B
Plaintext
42 lines
886 B
Plaintext
NAME
|
|
modify - modify a list or matrix by changing the values of its elements
|
|
|
|
SYNOPSIS
|
|
modify(x, y)
|
|
|
|
TYPES
|
|
x lvalue with list or matrix value
|
|
y string
|
|
|
|
return null value
|
|
|
|
DESCRIPTION
|
|
For modify(x, y), y is to be the name fname of a user-defined function.
|
|
The value of each element of x is replaced by the value of the
|
|
function at that value, i.e. if fname = "f", the value of x[[i]]
|
|
is changed to f(x[[i]]).
|
|
|
|
As the name indicates, modify(x) usually changes x values of elements
|
|
in x. To obtain a modified copy of x without changing values in x,
|
|
one may xmod = x; modify(xmod, y) or more simply (xmod = x, y).
|
|
|
|
EXAMPLE
|
|
> define f(x) = x^2
|
|
> A = list(2,4,6)
|
|
> modify(A, "f")
|
|
> print A
|
|
|
|
list (3 elements, 3 nonzero):
|
|
[[0]] = 4
|
|
[[1]] = 16
|
|
[[3]] = 36
|
|
|
|
LIMITS
|
|
none
|
|
|
|
LIBRARY
|
|
none
|
|
|
|
SEE ALSO
|
|
makelist
|