How to save an object generated by "assign" function as .RData file in a loop? Here is an example.
for (ii in 1:3){
QQ=matrix(runif(15),5,3)
assign(paste0("FF", ii),QQ)
}
1 Answer
Personally, I find that .RDS files are better suited to save single objects. For instance:
for (ii in 1:3) {
QQ = matrix(runif(15), 5, 3)
object_name <- paste0("FF", ii)
assign(object_name, QQ)
tmp_fle <- tempfile(pattern = object_name, fileext = ".RDS")
print(tmp_fle)
saveRDS(
object = get(x = object_name),
file = tmp_fle
)
}
Given the results:
# [1] "/var/folders/7x/kwc1y_l96t55_rwlv35mg8xh0000gn/T//Rtmpsj0j8h/FF1afe6b0a300.RDS"
# [1] "/var/folders/7x/kwc1y_l96t55_rwlv35mg8xh0000gn/T//Rtmpsj0j8h/FF2afe369d586e.RDS"
# [1] "/var/folders/7x/kwc1y_l96t55_rwlv35mg8xh0000gn/T//Rtmpsj0j8h/FF3afe1418b9c5.RDS"
To access second of the saved objects:
>> readRDS("/var/folders/7x/kwc1y_l96t55_rwlv35mg8xh0000gn/T//Rtmpsj0j8h/FF2afe369d586e.RDS")
[,1] [,2] [,3]
[1,] 0.38537636 0.2969078 0.9603315
[2,] 0.08339023 0.9127538 0.6552166
[3,] 0.55220069 0.4384881 0.5345182
[4,] 0.10179912 0.6353755 0.8247961
[5,] 0.63983736 0.8858784 0.8904668
library("fortunes"); fortune(236)stackoverflow.com/questions/17559390/… Learn to use lists:QQlist <- lapply(1:3, function(ii) matrix(runif(15),5,3))orQQlist <- replicate(3, matrix(runif(15),5,3), simplify = FALSE)