bike.csv <- read.csv("bike_sharing_data .csv")
head(bike.csv) 
row(bike.csv)
          [,1]  [,2]  [,3]  [,4]  [,5]  [,6]  [,7]  [,8]  [,9] [,10] [,11] [,12] [,13]
    [1,]     1     1     1     1     1     1     1     1     1     1     1     1     1
    [2,]     2     2     2     2     2     2     2     2     2     2     2     2     2
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   [76,]    76    76    76    76    76    76    76    76    76    76    76    76    76
 [ reached getOption("max.print") -- omitted 17304 rows ]
str(bike.csv)
'data.frame':   17380 obs. of  13 variables:
 $ bike_sharing_data..5.: chr  "datetime" "1/1/2011 0:00" "1/1/2011 1:00" "1/1/2011 2:00" ...
 $ X                    : chr  "season" "1" "1" "1" ...
 $ X.1                  : chr  "holiday" "0" "0" "0" ...
 $ X.2                  : chr  "workingday" "0" "0" "0" ...
 $ X.3                  : chr  "weather" "1" "1" "1" ...
 $ X.4                  : chr  "temp" "9.84" "9.02" "9.02" ...
 $ X.5                  : chr  "atemp" "14.395" "13.635" "13.635" ...
 $ X.6                  : chr  "humidity" "81" "80" "80" ...
 $ X.7                  : chr  "windspeed" "0" "0" "0" ...
 $ X.8                  : chr  "casual" "3" "8" "5" ...
 $ X.9                  : chr  "registered" "13" "32" "27" ...
 $ X.10                 : chr  "count" "16" "40" "32" ...
 $ X.11                 : chr  "sources" "ad campaign" "www.yahoo.com" "www.google.fi" ...
summary(bike.csv)
 bike_sharing_data..5.      X                 X.1                X.2           
 Length:17380          Length:17380       Length:17380       Length:17380      
 Class :character      Class :character   Class :character   Class :character  
 Mode  :character      Mode  :character   Mode  :character   Mode  :character  
     X.3                X.4                X.5                X.6           
 Length:17380       Length:17380       Length:17380       Length:17380      
 Class :character   Class :character   Class :character   Class :character  
 Mode  :character   Mode  :character   Mode  :character   Mode  :character  
     X.7                X.8                X.9                X.10          
 Length:17380       Length:17380       Length:17380       Length:17380      
 Class :character   Class :character   Class :character   Class :character  
 Mode  :character   Mode  :character   Mode  :character   Mode  :character  
     X.11          
 Length:17380      
 Class :character  
 Mode  :character  
sort(table(bike.csv$humidity), decreasing=TRUE)
integer(0)
season_value <- bike.csv$season[6251]
cat("The value of season in row 6251 is: ", season_value, "\n")
The value of season in row 6251 is:  
table(bike.csv$season)
< table of extent 0 >
bike.csv[(bike.csv$season %in% c(2, 4)) & (bike.csv$windspeed >+ 39.9), ]
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