Hi,how to create many empty dataframes at one time? I try, it seems that doesn't work
Appreciate any help!
nam=c("c1","c2","c3")
for(z in 1:3){
nam[z]<-data.frame(matrix(NA, nrow = 3, ncol = 2)
}
Created on 2023-06-01 with reprex v2.0.2
Hi,how to create many empty dataframes at one time? I try, it seems that doesn't work
Appreciate any help!
nam=c("c1","c2","c3")
for(z in 1:3){
nam[z]<-data.frame(matrix(NA, nrow = 3, ncol = 2)
}
Created on 2023-06-01 with reprex v2.0.2
for(z in c("c1","c2","c3")){
assign(z, data.frame(matrix(NA, nrow = 3, ncol = 2)))
}
When a more specific data frame is needed.
make_df <- function(x){
layout = data.frame(id = as.integer(),
type = as.factor(as.character()),
reading = as.numeric())
return(layout)
}
new_df <- c("df1","df2","df3")
for(i in seq_along(new_df)) assign(new_df[i],make_df(i))
ls()
#> [1] "df1" "df2" "df3" "i" "make_df" "new_df"
str(df1)
#> 'data.frame': 0 obs. of 3 variables:
#> $ id : int
#> $ type : Factor w/ 0 levels:
#> $ reading: num
Created on 2023-06-01 with reprex v2.0.2
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