[R] impossible # of errors in a simple code

Michael Dewey lists at dewey.myzen.co.uk
Sun Sep 4 13:38:54 CEST 2016


A useful rule is to fix the first error you understand and hope that the 
others go away.

On 04/09/2016 04:05, Tamar Michaeli 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)

So what did you hope your function was going to do, if you called it?

>> 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

Why did you think at this point that you had an object called file_inc?

>> sulfate <- subset(dat( , 2))
> Error in subset(dat(, 2)) : could not find function "dat"

So you did not manage anywhere to define a function called 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

You have never defined it.

>> save"pollutantmean.R"
> Error: unexpected string constant in "        save"pollutantmean.R""

?save might help you here.


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-- 
Michael
http://www.dewey.myzen.co.uk/home.html



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