How to give bar labels using barplot() function in Rstudio

[amodaks10]

.

Hello friends,
how to show bar labels on top of each bar in a bar plot in Rstudio.
barplot(....)
Thanks,
Amod Shirke

[tbradley]

I don't know about doing it with base graphs (i.e. barplot) but you can do it with ggplot2 with a combination of geom_bar and geom_text. Here is an example:

library(tibble)
library(ggplot2)
library(dplyr)
#> 
#> Attaching package: 'dplyr'
#> The following objects are masked from 'package:stats':
#> 
#>     filter, lag
#> The following objects are masked from 'package:base':
#> 
#>     intersect, setdiff, setequal, union

df <- tribble(
  ~x, ~fraction, ~group,
  "not_exempt", 0.08, "med_assist",
  "not_exempt", 0.04, "hospitilized",
  "exempt", 0.09, "med_assist",
  "exempt", 0.08, "hospitilized"
)

df %>% 
  mutate(x = factor(x)) %>% 
  ggplot(aes(x = x, y = fraction, fill = group)) + 
  geom_bar(stat = "identity", position = "dodge") + 
  geom_text(aes(y = fraction + 0.001, label = fraction, 
                x = if_else(group == "hospitilized", as.numeric(x) - 0.2, as.numeric(x) + 0.2)))
#> Warning: package 'bindrcpp' was built under R version 3.4.4

Created on 2018-09-08 by the reprex package (v0.2.0).

[jcblum]

Here are a couple of references that show how to add per-bar labels to plots created with base graphics barplot():

https://stats.idre.ucla.edu/r/faq/how-can-i-add-features-or-dimensions-to-my-bar-plot/

https://www.r-graph-gallery.com/37-barplot-with-number-of-observation/

[amodaks10]

Thanks jcblum...can you help me with Random forest algorithm...I have got a histogram
of No of nodes v/s No. of trees can we say that the more the no of nodes for the most trees better is the model...as it has analyzed deeply..

Thanks,
Amod Shirke