re ferring to a group of vectors without explicit enumeration

I am trying to define 25 vectors of varying lengths, say y1 to y25 in a loop,
and then store the results of some computations in them. My problem is about
using some sort of concatenation for names. For example, instead of
initializing each of y1 through y25, I would like to do it in a loop.
Similar to cat and paste for texts, is there anyway of using y"i" for the
vector name where i ranges from 1 to 25, so ultimately it refers to the
vector y1,..,y25?
Varying lengths is not a problem. To start with each has only length 1 and
then I will be adding to each vector based on some results.

output <- list()
for (i in 1:10) output[[i]] <- seq(i)

output

I am trying to define 25 vectors of varying lengths, say y1 to y25 in a loop,
and then store the results of some computations in them. My problem is about
using some sort of concatenation for names. For example, instead of
initializing each of y1 through y25, I would like to do it in a loop.
Similar to cat and paste for texts, is there anyway of using y"i" for the
vector name where i ranges from 1 to 25, so ultimately it refers to the
vector y1,..,y25?
Varying lengths is not a problem. To start with each has only length 1 and
then I will be adding to each vector based on some results.
--
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shalu <shahlar <at> hotmail.com> writes:

I am trying to define 25 vectors of varying lengths, say y1 to y25  
in a loop,
and then store the results of some computations in them. My problem  
is about
using some sort of concatenation for names. For example, instead of
initializing each of y1 through y25, I would like to do it in a loop.
Similar to cat and paste for texts, is there anyway of using y"i"  
for the
vector name where i ranges from 1 to 25, so ultimately it refers to  
the
vector y1,..,y25?
Varying lengths is not a problem. To start with each has only  
length 1 and
then I will be adding to each vector based on some results.

 I think this is essentially

http://cran.r-project.org/doc/FAQ/R-FAQ.html
#How-can-I-turn-a-string-into-a-variable?

[URL broken in order to make Gmane happy, reassemble it
in your browser]

 the short answer: assign(), but it would work better
to use a list instead.

I would suggest that you use a list to store the values since it is
easier to create and reference:

output <- list()
for (i in 1:10) output[[i]] <- seq(i)

output

[[1]]
[1] 1

[[2]]
[1] 1 2

[[3]]
[1] 1 2 3

[[4]]
[1] 1 2 3 4

[[5]]
[1] 1 2 3 4 5

[[6]]
[1] 1 2 3 4 5 6

[[7]]
[1] 1 2 3 4 5 6 7

[[8]]
[1] 1 2 3 4 5 6 7 8

[[9]]
[1] 1 2 3 4 5 6 7 8 9

[[10]]
 [1]  1  2  3  4  5  6  7  8  9 10

On Sat, Sep 6, 2008 at 5:33 PM, shalu <shahlar at hotmail.com> wrote:

I am trying to define 25 vectors of varying lengths, say y1 to y25 in a
loop,
and then store the results of some computations in them. My problem is
about
using some sort of concatenation for names. For example, instead of
initializing each of y1 through y25, I would like to do it in a loop.
Similar to cat and paste for texts, is there anyway of using y"i" for the
vector name where i ranges from 1 to 25, so ultimately it refers to the
vector y1,..,y25?
Varying lengths is not a problem. To start with each has only length 1
and
then I will be adding to each vector based on some results.
--
View this message in context:
http://www.nabble.com/referring-to-a-group-of-vectors-without-explicit-enumeration-tp19351518p19351518.html
Sent from the R help mailing list archive at Nabble.com.

-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?