CODEWITHSUNDEEP
r
user2686890
user2686890

Reputation: 3

Plotting time vs duration in R

I'm trying to plot a time vs duration scatterplot in R but encountered problems which I am not sure how to solve or if the problem lies in my data.frame.

I've tried looking through other examples on this website and others but haven't found what I'm looking for.

My data.frames look like :

    dput(head(departure.time))
    structure(list(V1 = structure(c(35L, 36L, 5L, 6L, 7L, 8L), .Label = c("0:00", 
    "0:30", "1:00", "1:30", "10:00", "10:30", "11:00", "11:30", "12:00", 
    "12:30", "13:00", "13:30", "14:00", "14:30", "15:00", "15:30", 
    "16:00", "16:30", "17:00", "17:30", "18:00", "18:30", "19:00", 
    "19:30", "2:00", "2:30", "20:00", "20:30", "21:00", "21:30", 
    "22:00", "22:30", "23:00", "23:30", "9:00", "9:30"), class = "factor")), .Names =       "V1", row.names = c(NA, 
     6L), class = "data.frame")

    dput(head(travel.time))
    structure(list(V1 = c(490L, 492L, 485L, 486L, 483L, 488L)), .Names = "V1",     row.names = c(NA, 
    6L), class = "data.frame")

I'm not sure why my travel.time is showing only 6 entries when it has 36 obs as does the departure.time frame

Additionally, the code i tried was 

    plot(departure.time, travel.time, main="Variable Travel Time", xlab="Departure Time", ylab="Travel Time in Minutes", pch=19)

But i received the error

    Error in xy.coords(x, y, xlabel, ylabel, log) :

'x' and 'y' lengths differ

Any advice?

Upvotes: 0

Views: 198

Answers (1)

Señor O
Señor O

Reputation: 17412

Edit your code to: 

plot(departure.time$V1, travel.time$V1, main="Variable Travel Time", xlab="Departure Time", ylab="Travel Time in Minutes", pch=19)

read.table outputs a data.frame (see help(read.table), section value), so you need to tell plot which column to use from each data frame.

If you want departure.time to be a vector and not a dataframe, you should use scan instead of read.table.

Upvotes: 1

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