> pollutantmean <- function(directory, pollutant, id=1:332){
+ filelist <- list.files(path = directory, pattern = ".CSV", full.names = TRUE)
+ Value <- numeric()
+
+ for (i in id){
+ data <- read.csv(filelist[i])
+ Value <- c(value, data[[pollutant]])
+ }
+ mean(value, no.rm = T)
+ }
>
> pollutantmean("C:/Users/Mohamed/Documents/specdata", "sulfate")
my working hare try to read the mean for 332 file saved in directory but everytime i past the path found the below error Error in file(file, "rt") : invalid 'description' argument
i have tried / after the link but it didn't work
i have tried // but also it didn't work
that is my first code in R and it make me made from this first error