R help - Jun 2009 - applying a function to a pair of components for each row of a list

Hi,

I have a set of (x,y) coordinate pairs that are stored as a list
> my_list
$x
 [1]  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
25

$y
 [1] -8.0866819 -7.3876052 -6.6849311 -5.9837693 -5.2967432 -4.6525466
 [7] -4.0999453 -3.6556190 -3.3076102 -3.0360780 -2.8220465 -2.6532085
[13] -2.5192816 -2.4086241 -2.3072977 -2.1969611 -2.0574250 -1.8737694
[19] -1.6357864 -1.3478118 -1.0228402 -0.6708884 -0.2973863  0.0922034
[25]  0.4935457

I would like to plot each of these points onto an existing plot. ie., For
each (x,y) pair, I would like to do:
>points(x,y)
How can I do this in a vectorized manner?

Thanks!
Kavitha

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Hi Kavitha,

I must confess you that I not understood well what you are looking for.
But..

mylist<-list(x=1:25, y=runif(n=25))
plot(mylist, type="n")
points(mylist, type="p", col=mylist$x)
Hth,

miltinho



On Sun, Jun 28, 2009 at 1:03 AM, Kavitha Venkatesan <
kavitha.venkatesan@gmail.com> wrote:
> Hi,
>
> I have a set of (x,y) coordinate pairs that are stored as a list
>
> > my_list
> $x
>  [1]  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
> 24
> 25
>
> $y
>  [1] -8.0866819 -7.3876052 -6.6849311 -5.9837693 -5.2967432 -4.6525466
>  [7] -4.0999453 -3.6556190 -3.3076102 -3.0360780 -2.8220465 -2.6532085
> [13] -2.5192816 -2.4086241 -2.3072977 -2.1969611 -2.0574250 -1.8737694
> [19] -1.6357864 -1.3478118 -1.0228402 -0.6708884 -0.2973863  0.0922034
> [25]  0.4935457
>
> I would like to plot each of these points onto an existing plot. ie., For
> each (x,y) pair, I would like to do:
>
> >points(x,y)
>
> How can I do this in a vectorized manner?
>
> Thanks!
> Kavitha
>
>        [[alternative HTML version deleted]]
>
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>
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