Here’s a good example of how useful `sapply `

can be. I have some data from Qualtrics, and each response is coded in its own variable. 262 more words

## Tags » Barplot

#### Barplots across variables in R

#### 3D bar plot on a map in R

In this post we are going to learn how to plot 3D barplots on a map using R. It is actually not as complicated as it looks. 427 more words

#### Basic ggplot - Barplot

Make a data frame with a categorial variable as factor or character and plot a barplot using geom_bar()

```
N=1000
a=c("freshman","graduate","junior","senior","sophmore")
students=factor(sample(1:5,N,replace=TRUE),labels=a)
plot(table(students))
barplot(table(students))
mydata=data.frame(as.character(students))
p=ggplot(mydata, aes(x = students))
p=p+geom_bar(fill=I(rgb(100,100,250,maxColorValue=255)))
p
# Also works with character variables
mydata=data.frame(as.character(students))
p=ggplot(mydata, aes(x = students))
p=p+geom_bar(fill=I(rgb(100,100,250,maxColorValue=255)))
p=p+scale_x_discrete("")
p=p+scale_y_continuous("")
p
# Columns side-by-side
library(reshape2)
df = melt(data.frame(A=c(3, 10), B=c(5, 20),
experiment=c("A", "A & B")),
variable.name="metric")
ggplot(df, aes(experiment, value, fill=metric)) +
geom_bar(position="dodge",stat="identity")
# Barplot for timeseries ... 47 more words
```

#### Using GSS Data to Illustrate Barplot Using R

To create a barchart we can extract a column from a data frame of the General Social Survey.

First download the data and codebook from 138 more words

#### another terrible graph

**L**e **M**onde illustrated an article about discriminations against women with this graph which gives the number of men for 100 women per continent. This is a fairly poor graph, fit for one of… 81 more words

#### Base Graphics in R

Few things to remember about base plotting system in R.

- You start with plot() function and build things up from there.
- If you wan’t to add things to the plot you use functions like text, lines, axis, points etc. 415 more words