[R] impossible # of errors in a simple code

[David Winsemius]

> On Sep 3, 2016, at 8:05 PM, Tamar Michaeli <tmichaeli001 at gmail.com> wrote:
> 
> Any help in resolving the following errors will be appreciated:
> 
>> pollutantmean <- function(directory, pollutant, id=1:332)
> + file_inc <- list.files("specdata", full.names=TRUE)
>> dat <- data.frame()
>> for(i in 1:10) {
> + dat <- rbind(dat, read.csv(file_inc[i]))
> + }
> Error in read.table(file = file, header = header, sep = sep, quote = quote,
> :
>  object 'file_inc' not found
>> sulfate <- subset(dat( , 2))
> Error in subset(dat(, 2)) : could not find function "dat"
>> nitrate <- subset(dat( , 3))
> Error in subset(dat(, 3)) : could not find function "dat"
>> mean(pollutant)
> Error in mean(pollutant) : object 'pollutant' not found
>> save"pollutantmean.R"
> Error: unexpected string constant in "        save"pollutantmean.R""

This is pretty clearly an effort at solving a homework problem for Peng's R Coursera course. Homework questions are off-topic on Rhelp (and are not really encouraged on StackOverflow but you can probably find a worked example there by searching on " [r] pollutant list.files specdata".)  When I tried out the course a few years ago the the participants were advised to post their questions at a website established for the course.

-- 
David.
> 
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