Specifying bins in histogram on the x- axis using ggplot2 in r

Question

In am plotting histogram in r an I want to specify my bins but I am getting some else.

This is my lenght data

pss <-
structure(list(LengthSize = c(48, 39, 94, 30, 81, 49, 44, 85, 
44, 55, 45, 47, 44, 43, 42, 44, 76, 42, 65, 43, 43, 90, 105, 
32, 31, 43, 36, 65, 21, 15, 113, 113, 44, 46, 94, 90, 95, 37, 
25, 72, 49, 46, 48, 49, 49, 44, 50, 48, 37, 37, 55, 60, 65, 30, 
22, 26, 43, 43, 43, 43, 18, 67, 110, 64, 28, 29, 38, 37, 38, 
37, 38, 70, 58, 65, 55, 60, 40, 22, 68, 88, 88, 32, 44, 86, 37, 
38, 67, 52, 48, 123, 50, 114, 37, 38, 39, 41, 60, 55, 50, 99, 
57, 44, 45, 45, 51, 44, 45, 37, 39, 43, 43, 50, 51, 34, 42, 44, 
46, 67, 67, 56, 56, 57, 56, 47, 65, 66, 43, 41, 69, 45, 114, 
60, 55, 37, 88, 85, 39, 39, 46, 50, 60, 44, 77, 61, 68, 46, 114, 
51, 105, 48, 95, 32, 40, 28, 42, 47, 46, 48, 50, 96, 45, 47, 
118, 55, 60, 34, 118, 39, 52, 119, 40, 55, 60, 55, 59, 102, 73, 
42, 78, 56, 74, 102, 88, 38, 36, 33, 34, 41, 120, 50, 46, 79, 
98, 65, 40, 45, 42, 50, 61, 44)), 
row.names = c(NA, 200L), class = "data.frame")

This is my code in ggplot2.

pss %>% 
ggplot(data = pss,breaks = 25,xlim = c(0,528,11), mapping = aes(x = LengthSize )) +
    geom_histogram(binwidth = 10, col = "black", fill = "grey")

Please log in and take a look at the data in your question. It is not very pleasant to the eyes. Please format your post appropriately. It's also better to provide data with `dput`. Use `dput(head(df,n))`. — NelsonGon, Aug 06 '19 at 16:27
Just pass `bins=no_bins_you_want` inside your `geom_histogram(binwidth = 10, bins=50, col = "black", fill = "grey")`. Experiment with different numbers till you find the one appealing to your desire. — deepseefan, Aug 06 '19 at 16:36
You don't need the pipe `pss %>%` and then `ggplot(data = pss, etc)`. Use just one of them. (Suggestion: not the pipe.) — Rui Barradas, Aug 06 '19 at 16:44

score 0 · Answer 1 · answered Aug 06 '19 at 17:13

0

You're in the right track, just modify your script as follows. You can experiment with binwidth and bins. You can easily modify or remove the title, xlab and ylab if you don't want them.

library(ggplot2)
ggplot(pss, mapping = aes(LengthSize)) + geom_histogram(binwidth = 3, bins=50, col = "black", fill = "grey") + ggtitle("My plot title") + xlab("My X axis label - length size") + ylab("Y axis label - Fequency count") + theme(plot.title = element_text(hjust = 0.5))

On the basis of the sample data above, the script produces the following histogram.

answered Aug 06 '19 at 17:13

deepseefan

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Deepseefan I am trying your code but getting the same plot I have been producing my bins are 100, 200, and so on – Robert Wilson Aug 07 '19 at 16:37
@RobertWilson, have a look [here](https://stackoverflow.com/questions/34774120/set-number-of-bins-for-histogram-directly-in-ggplot/34774372) and let me know if it helps. – deepseefan Aug 07 '19 at 22:36
@ Deepseefan I am seeing decimals as my bins instead of the actual bins so it doesn't help. – Robert Wilson Aug 08 '19 at 10:22
@RobertWilson can you edit your post and attach your output? – deepseefan Aug 08 '19 at 10:27
the plot above represent my data but it is not reflecting in my code when I run it. – Robert Wilson Aug 08 '19 at 10:53
@RobertWilson what does it produce? I'm curious to see the output produced at your end. Is `ggplot2` installed and loaded on your system? – deepseefan Aug 08 '19 at 11:10
I have ggplot2 installed but I am trying to paste the plot to show what I am talking about – Robert Wilson Aug 08 '19 at 11:28

Specifying bins in histogram on the x- axis using ggplot2 in r

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