# [R] Graph question

Jim Lemon jim at bitwrit.com.au
Thu Sep 25 13:13:05 CEST 2008

Georgina Sarah Humphreys wrote:
> If I have a set of data comprising a list of numbers of eggs on mosquito guts that range from 1 to 157.  How can I get R to draw a barchart of the distribution of the data (i.e. x axis= number of eggs on a gut, y axis=number of mosquitoes found with that number of eggs)?  Data is listed below.
>
> Thanks,
> Georgina
>
> Number of eggs on each mosquito gut:
>  [1]   1   1   1   1   4   2   1  12  12   1   2   1  12   6  11  33  33  94  17
>  [20]   3  14  12  54   1  16  10   7  12   4   7  22   1  34   2  11  34  22  27
>  [39]   4   1  27   1   1 157   1   7  31   3   6  24   6   7  23  10  54   3  12
>  [58]  12   5   2  27   2   7   6  84   3  68   1   4   6  41   1  50  27  30  14
>  [77]   3   1   1   1  30   1  68   1   7   1  10   5  11   4  19   1   7   9  33
>  [96]   2  33  57  12   6   2  57   3 115  19  22  10  19   6  11  30  57   4
>
>
Hi Georgina,
Here's one way:

# first I created a vector named neggs with your data above
eggfreq<-freq(neggs)
library(plotrix)
barp(eggfreq[[1]],names.arg=names(eggfreq[[1]]),
xlab="Number of eggs",ylab="Frequency",
main="Eggs on mosquito guts")

Jim