Hello,
Inline.
Em 11-12-2012 12:04, surekha nagabhushan escreveu:
Rui,
I have initialized it...doesn't seem to help...
result_vector <- vector()
No! This must be just before the loop in 'j'
result <- vector("list", (length(test1)-1))
for(i in 1:(length(test1)-1))
{
for(j in (i+1):length(test1))
{
result_vector[j-i] <- agrep(test1[i], test1[j], ignore.case = TRUE, value
= TRUE, max.distance = 0.1)
}
result[[i]]<- result_vector
}
whenever agrep does not find a match it returns character(0), length zero,
do you suppose it has anything to do with that?
Yes, without testing for length zero it throws an error, "replacement
has length zero".
Hope this helps,
Rui Barradas
Thank you.
On Tue, Dec 11, 2012 at 5:13 PM, Rui Barradas <ruipbarra...@sapo.pt> wrote:
Hello,
See if this is it. You must reinitialize 'result_vector' just before the
loop that constructs it.
test1 <- c("Vashi", "Vashi,navi Mumbai", "Thane", "Vashi,new Mumbai",
"Thana", "Surekha", "Thane(w)", "surekhaN")
result <- vector("list", (length(test1)-1))
for(i in 1:(length(test1)-1)){
result_vector <- vector()
for(j in (i+1):length(test1)){
tmp <- agrep(test1[i], test1[j],
ignore.case = TRUE, value = TRUE,
max.distance = 0.1)
if(length(tmp) > 0) result_vector[j-i] <- tmp
}
result[[i]] <- result_vector
}
result
Hope this helps,
Rui Barradas
Em 11-12-2012 11:23, surekha nagabhushan escreveu:
Pascal,
result_vector <- vector()
result <- vector("list", (length(test1)-1))
for(i in 1:(length(test1)-1))
{
for(j in (i+1):length(test1))
{
result_vector[j-i] <- agrep(test1[i], test1[j], ignore.case = TRUE,
value
= TRUE, max.distance = 0.1)
}
result[[i]]<- result_vector
}
I'm not sure what the problem is with the dimension/length of result which
is a list. But I just use the second line: result <- vector("list",
(length(test1)-1))
What am I missing?
Thank you Rui Barradas.
On Tue, Dec 11, 2012 at 4:25 PM, Rui Barradas <ruipbarra...@sapo.pt>
wrote:
Hello,
And another error in line 2. It should be
for(j in (i+1):length(test1))
Hope this helps,
Rui Barradas
Em 11-12-2012 07:54, Pascal Oettli escreveu:
Hi,
There is a mistake in the first line. It should be:
for(i in 1:(length(test1)-1))
Regards,
Pascal
Le 11/12/2012 16:01, surekha nagabhushan a écrit :
Hi all.
This is my first message at R-help...so I'm hoping I have some
beginner's
luck and get some good help for my problem!
FYI I have just started using R recently so my knowledge of R is pretty
preliminary.
Okay here is what I need help with - I need to know how to use agrep
in a
for loop.
I need to compare elements of a vector of names with other elements of
the
same vector.
However if I use something like this:
for(i in 1:length(test1)-1)
{
for(j in i+1:length(test1))
{
result[[i]][j] <- agrep(test1[i], test1[j], ignore.case = TRUE,
value
=
TRUE, max.distance = 0.1)
}
}
I get an error message saying - invalid 'pattern' argument. -* Error in
agrep(test1[i], test1[j], ignore.case = TRUE, value = TRUE,
max.distance
=
0.1) : *
* invalid 'pattern' argument*
Test 1 being - c("Vashi", "Vashi,navi Mumbai", "Thane", "Vashi,new
Mumbai",
"Thana", "Surekha", "Thane(w)", "surekhaN")
This is the first time I'm using agrep, I do not understand how it
works
fully...
Kindly help...
Thank you.
Su.
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