RE: Newbie question
- To: mathgroup at smc.vnet.net
- Subject: [mg25300] RE: [mg25275] Newbie question
- From: "David Park" <djmp at earthlink.net>
- Date: Tue, 19 Sep 2000 03:45:21 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Jose,
data = Table[{x[i], y[i]}, {i, 5}]
{{x[1], y[1]}, {x[2], y[2]}, {x[3], y[3]}, {x[4], y[4]}, {x[5], y[5]}}
Here is a pure function which calculates the form you want on a pair of
arguments.
{#1, 1/#2} &[x, y]
{x, 1/y}
But you have to Apply it to a list of two values.
{#1, 1/#2} & @@ {x, y}
{x, 1/y}
So we make an extended pure function which maps the above onto your data
list.
{#1, 1/#2} & @@ # & /@ data
{{x[1], 1/y[1]}, {x[2], 1/y[2]}, {x[3], 1/y[3]},
{x[4], 1/y[4]}, {x[5], 1/y[5]}}
David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/
> -----Original Message-----
> From: Jose M Lasso [mailto:jml at accessinter.net]
To: mathgroup at smc.vnet.net
> Hi Mathgroup,
>
> I have some numerical data: data:={{x,y},{x1,y1},{x2,y2}....{xn,yn}},
> I want to transform the data like this:
> data1:={{x,1/y},{x1,1/y1},{x2,1/y2}....{xn,1/yn}}, how can I do this
> transformation? Thanx in advance. Regards
>
> Jose M Lasso