CODEWITHSUNDEEP
rggplot2histogram
user7273912
user7273912

Reputation:

Very simple - Histogram in R

I am struggling to understand how I can get the following data into a histogram:

NSP <- c(1380, 6003, 1827, 661, 331, 156, 97, 73, 58) 
hist(NSP)

Each number should represent one bar in the exactly same order. I tried to use ggplot but failed to get the frequencies on the Y axis.

Many thanks in advance!

Upvotes: 2

Views: 140

Answers (2)

Thales
Thales

Reputation: 605

Maybe what you want is barplot(NSP)?

R plot output

Upvotes: 1

Mark Peterson
Mark Peterson

Reputation: 9560

If you are trying to use ggplot2, then you likely want geom_col. Note that you will need to specify x-positions for the bars. Here, I am just specifying them as 1:length(NSP) using seq_along:

ggplot(
  mapping = aes(y = NSP
                , x = seq_along(NSP))) +
  geom_col() +
  scale_x_continuous(breaks = seq_along(NSP))

enter image description here

If you have other labels for the breaks, you can specify them, e.g.:

ggplot(
  mapping = aes(y = NSP
                , x = seq_along(NSP))) +
  geom_col() +
  scale_x_continuous(breaks = seq_along(NSP)
                     , labels = LETTERS[seq_along(NSP)])

enter image description here

Note, however, that ggplot generally works much more smoothly when your data are in a data.frame. This may be a more flexible approach for you, and allow more succinct naming of the column locations (e.g., if they are not evenly spaced, you could have one column for the actual location, and one column for the label).

NSP_df <- data.frame(Location = LETTERS[seq_along(NSP)]
                     , Count = NSP)

ggplot(
  NSP_df
  , aes(y = Count
        , x = Location)) +
  geom_col()

enter image description here

Upvotes: 2

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