[R] Read large '.csv' files from zipped file

[Jianwen Luo]

Hi all,
    I use ireadLines function to iterate large '.csv' files from '.zip' file. When I execute the nextElem function in R console, I can only fetch the first line of file content no matter how many times . Example code show as bellow.
> library(iterators) 
> con<-unz(description='g:\\hourly_WIND_2013.zip',filename='hourly_WIND_2013.csv') 
> it<-ireadLines(con) 
> nextElem(it) 
[1] "\"State Code\",\"County Code\",\"Site Num\",\"Parameter Code\",\"POC\",\"Latitude\",\"Longitude\",\"Datum\",\"Parameter Name\",\"Date Local\",\"Time Local\",\"Date GMT\",\"Time GMT\",\"Sample Measurement\",\"Units of Measure\",\"MDL\",\"Uncertainty\",\"Qualifier\",\"Method Type\",\"Method Name\",\"State Name\",\"County Name\",\"Date of Last Change\"" 
> nextElem(it) 
[1] "\"State Code\",\"County Code\",\"Site Num\",\"Parameter Code\",\"POC\",\"Latitude\",\"Longitude\",\"Datum\",\"Parameter Name\",\"Date Local\",\"Time Local\",\"Date GMT\",\"Time GMT\",\"Sample Measurement\",\"Units of Measure\",\"MDL\",\"Uncertainty\",\"Qualifier\",\"Method Type\",\"Method Name\",\"State Name\",\"County Name\",\"Date of Last Change\"" 
> 
    Can anybody tell me what did i missed?

Regards



Jianwen Luo

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