1
I need to do a histogram. I have the following 3 columns:
L courses offered
M vacancies offered
N filled vacancies
Vacancies offered and filled ok, the problem is that I can not put the data of column L in axis X. I used the command, but I get an error message:
hist(ESCOLA$DESCSERIE, breaks=seq(from=1, to=255), main="CURSOS",
xlab="DESCSERIE", ylab="MATRIC")
Error in hist.default(ESCOLA$DESCSERIE, breaks = seq(from = 1, to = 255), :
'x' deve ser numérico
2
The histogram is a graph designed to visualize the distribution of numerical variables by the sampling space. You can fulfill the same function with categorical information (as should be the variable L - courses offered).
Creating dummy data to use in the answer
library(tidyverse)
set.seed(123)
escola <- data_frame(
curso = sample(c("Direito", "Economia", "Estatística", "Serviço Social"),
size = 100, replace = TRUE)
)
To create a bar chart that helps understand the distribution of categorical variables in the sample space with the ggplot2, just pass the data.frame for the function ggplot() and the variable name for the function aes().
ggplot(escola, aes(curso)) +
geom_bar()
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