I have a data frame like this:
Category Observed_value A 100 A 130 A 140 B 90 C 80 D 120 D 130
I need to create an index column that show the number of the observation
for each category. I have three observations in the category A, one in
category B, one in category C and two in
Hi. Here is one approach:
x - rep(c(A, B, C), c(3,1,2))
DF - data.frame(x, stringsAsFactors=FALSE)
cbind(DF, new_c=c(lapply(rle(DF$x)[[1]], function(x) 1:x), recursive=T))
Andrija
On Wed, May 28, 2014 at 10:46 PM, Marcos Santos mmsantos...@gmail.comwrote:
I have a data frame like this:
Here is another approach:
x - rep(c(A, B, C), c(3,1,2))
DF1 - data.frame(x)
cbind(DF1, new_c=ave(as.numeric(DF1$x), DF1$x, FUN=function(x) 1:length(x)))
Note the difference between DF (in previous solution) and DF1
str(DF)
str(DF1)
Andrija
On Thu, May 29, 2014 at 12:03 AM, Andrija Djurovic
Absolutely fantastic!
Thank you for the TWO approachs.
2014-05-28 19:13 GMT-03:00 Andrija Djurovic djandr...@gmail.com:
Here is another approach:
x - rep(c(A, B, C), c(3,1,2))
DF1 - data.frame(x)
cbind(DF1, new_c=ave(as.numeric(DF1$x), DF1$x, FUN=function(x)
1:length(x)))
Note the
Hi,
If it ordered by the variable x, you could also try:
within(DF1, new_c-sequence(table(x)))
A.K.
On Wednesday, May 28, 2014 6:14 PM, Andrija Djurovic djandr...@gmail.com
wrote:
Here is another approach:
x - rep(c(A, B, C), c(3,1,2))
DF1 - data.frame(x)
cbind(DF1,
Perfect!
Thank you a lot!
2014-05-28 21:57 GMT-03:00 arun smartpink...@yahoo.com:
Hi,
If it ordered by the variable x, you could also try:
within(DF1, new_c-sequence(table(x)))
A.K.
On Wednesday, May 28, 2014 6:14 PM, Andrija Djurovic djandr...@gmail.com
wrote:
Here is another
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