A stupid question but I just cannot see how to do
this.
I have a loop that does some calculations and puts the
results in a vector for each iteration, but I cannot
see how to get the data out of the loop in such a way
that I can use it. I can print it but how do I get it
into a set of vectors or what ever.
Any help gratefully received. Thanks
Example
cata <- c( 3,5,6,8,0, NA)
catb <- c( 1,2,3,4,5,6)
doga <- c(3,5,3,6,4, 0)
dogb <- c(2,4,6,8,10, 12)
rata <- c (NA, 5, 5, 4, 9, 0)
ratb <- c( 1,2,3,4,5,6)
bata <- c( 12, 42,NA, 45, 32, 54)
batb <- c( 13, 15, 17,19,21,23)
id <- Cs(a,b,b,c,a,b)
site <- c(1,1,4,4,1,4)
mat1 <- cbind(cata, catb, doga, dogb, rata, ratb,
bata, batb)
Df <- data.frame(site, id, mat1)
nn <- levels(Df$id)
Df
nn
rate <- c(2,3,4)
for (i in 1: length(nn)) {
dd<- subset(Df, id==nn[i])
scat <- sum(c(dd$cata,dd$catb), na.rm=T)
sdog <- sum(c(dd$doga,dd$dogb), na.rm=T)
srat <- sum(c(dd$rata, dd$ratb), na.rm=T)
sbat <- sum(c(dd$bata,dd$batb), na.rm=T)
sss <- c(scat,sdog, srat,sbat) * rate[i]
print(sss)
}
Store it in a 'list'; see modified script below:
cata <- c( 3,5,6,8,0, NA)
catb <- c( 1,2,3,4,5,6)
doga <- c(3,5,3,6,4, 0)
dogb <- c(2,4,6,8,10, 12)
rata <- c (NA, 5, 5, 4, 9, 0)
ratb <- c( 1,2,3,4,5,6)
bata <- c( 12, 42,NA, 45, 32, 54)
batb <- c( 13, 15, 17,19,21,23)
id <- c('a', 'b', 'b', 'c', 'a',
'b')
site <- c(1,1,4,4,1,4)
mat1 <- cbind(cata, catb, doga, dogb, rata, ratb,
bata, batb)
Df <- data.frame(site, id, mat1)
nn <- levels(Df$id)
Df
nn
rate <- c(2,3,4)
Result <- list()
for (i in 1: length(nn)) {
dd<- subset(Df, id==nn[i])
scat <- sum(c(dd$cata,dd$catb), na.rm=T)
sdog <- sum(c(dd$doga,dd$dogb), na.rm=T)
srat <- sum(c(dd$rata, dd$ratb), na.rm=T)
sbat <- sum(c(dd$bata,dd$batb), na.rm=T)
sss <- c(scat,sdog, srat,sbat) * rate[i]
Result[[i]] <- sss
print(sss)
}
Result
On 8/8/06, John Kane <jrkrideau@yahoo.ca> wrote:>
> A stupid question but I just cannot see how to do
> this.
>
> I have a loop that does some calculations and puts the
> results in a vector for each iteration, but I cannot
> see how to get the data out of the loop in such a way
> that I can use it. I can print it but how do I get it
> into a set of vectors or what ever.
>
> Any help gratefully received. Thanks
>
> Example
>
> cata <- c( 3,5,6,8,0, NA)
> catb <- c( 1,2,3,4,5,6)
> doga <- c(3,5,3,6,4, 0)
> dogb <- c(2,4,6,8,10, 12)
> rata <- c (NA, 5, 5, 4, 9, 0)
> ratb <- c( 1,2,3,4,5,6)
> bata <- c( 12, 42,NA, 45, 32, 54)
> batb <- c( 13, 15, 17,19,21,23)
> id <- Cs(a,b,b,c,a,b)
> site <- c(1,1,4,4,1,4)
> mat1 <- cbind(cata, catb, doga, dogb, rata, ratb,
> bata, batb)
> Df <- data.frame(site, id, mat1)
> nn <- levels(Df$id)
>
> Df
> nn
> rate <- c(2,3,4)
>
> for (i in 1: length(nn)) {
> dd<- subset(Df, id==nn[i])
> scat <- sum(c(dd$cata,dd$catb), na.rm=T)
> sdog <- sum(c(dd$doga,dd$dogb), na.rm=T)
> srat <- sum(c(dd$rata, dd$ratb), na.rm=T)
> sbat <- sum(c(dd$bata,dd$batb), na.rm=T)
> sss <- c(scat,sdog, srat,sbat) * rate[i]
> print(sss)
> }
>
> ______________________________________________
> R-help@stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
--
Jim Holtman
Cincinnati, OH
+1 513 646 9390
What is the problem you are trying to solve?
[[alternative HTML version deleted]]
I'd create an empty dataframe prior to the loop.
cata <- c( 3,5,6,8,0, NA)
catb <- c( 1,2,3,4,5,6)
doga <- c(3,5,3,6,4, 0)
dogb <- c(2,4,6,8,10, 12)
rata <- c (NA, 5, 5, 4, 9, 0)
ratb <- c( 1,2,3,4,5,6)
bata <- c( 12, 42,NA, 45, 32, 54)
batb <- c( 13, 15, 17,19,21,23)
id <- c('a', 'b', 'b', 'c', 'a',
'b')
site <- c(1,1,4,4,1,4)
mat1 <- cbind(cata, catb, doga, dogb, rata, ratb,
bata, batb)
Df <- data.frame(site, id, mat1)
nn <- levels(Df$id)
Df
nn
rate <- c(2,3,4)
Result <- data.frame(matrix(NA,length(nn),4))
for (i in 1: length(nn)) {
dd<- subset(Df, id==nn[i])
scat <- sum(c(dd$cata,dd$catb), na.rm=T)
sdog <- sum(c(dd$doga,dd$dogb), na.rm=T)
srat <- sum(c(dd$rata, dd$ratb), na.rm=T)
sbat <- sum(c(dd$bata,dd$batb), na.rm=T)
sss <- c(scat,sdog, srat,sbat) * rate[i]
Result[i,] <- sss
print(sss)
}
Result
>From: John Kane <jrkrideau at yahoo.ca>
>To: R R-help <r-help at stat.math.ethz.ch>
>Subject: [R] Getting data out of a loop
>Date: Tue, 8 Aug 2006 18:00:23 -0400 (EDT)
>
>A stupid question but I just cannot see how to do
>this.
>
>I have a loop that does some calculations and puts the
>results in a vector for each iteration, but I cannot
>see how to get the data out of the loop in such a way
>that I can use it. I can print it but how do I get it
>into a set of vectors or what ever.
>
>Any help gratefully received. Thanks
>
>Example
>
>cata <- c( 3,5,6,8,0, NA)
>catb <- c( 1,2,3,4,5,6)
>doga <- c(3,5,3,6,4, 0)
>dogb <- c(2,4,6,8,10, 12)
>rata <- c (NA, 5, 5, 4, 9, 0)
>ratb <- c( 1,2,3,4,5,6)
>bata <- c( 12, 42,NA, 45, 32, 54)
>batb <- c( 13, 15, 17,19,21,23)
>id <- Cs(a,b,b,c,a,b)
>site <- c(1,1,4,4,1,4)
>mat1 <- cbind(cata, catb, doga, dogb, rata, ratb,
>bata, batb)
>Df <- data.frame(site, id, mat1)
>nn <- levels(Df$id)
>
>Df
>nn
>rate <- c(2,3,4)
>
>for (i in 1: length(nn)) {
>dd<- subset(Df, id==nn[i])
>scat <- sum(c(dd$cata,dd$catb), na.rm=T)
>sdog <- sum(c(dd$doga,dd$dogb), na.rm=T)
>srat <- sum(c(dd$rata, dd$ratb), na.rm=T)
>sbat <- sum(c(dd$bata,dd$batb), na.rm=T)
>sss <- c(scat,sdog, srat,sbat) * rate[i]
>print(sss)
>}
>
>______________________________________________
>R-help at stat.math.ethz.ch mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.