How to Add Horizontal Discrete Legend Below the Chart in Ggvis ❤️

In this article, we are going to see how to add horizontal discrete legend below the chart in ggvis in R Programming Language.

Add Horizontal Discrete Legend Below the Chart in Ggvis

The ggvis package in R is used for data visualization. It is also used to create interactive web graphics. It is also used to create interactive graphs and plots. It is an addition to the ggplot package. It provides the framework to build HTML graphs in the working space. The package can be downloaded and installed into the working space using the following command :

install.packages("ggvis")

A data frame can be created using the data.frame method which takes as input a number of columns and the values stored in it. This data can be visualized using the ggvis method which computes the visual representation of the y-axis and x-axis data contained in the data frame. The ggvis method has the following syntax.

Syntax: ggvis(~y,~x,stroke)

Arguments:

~y,~x- y-axis and x-axis of the data frame

stroke- the different color values to plot different lines in ggvis

The gvisLineChart is used to plot Google Line Chart with R. On plotting the data, a window screen opens plotting the data.

Syntax: gvisLineChart(data, options = list())

Arguments :

data – The data frame to be plotted

options – The specification for the data

R

# installing the required libraries
library(googleVis)
library(tidyverse)
 
# creating a data frame
data_frame = data.frame(group = c("Beginnerter","w3wiki",
                                  "Beginnerter","Beginnerter",
                                  "w3wiki","w3wiki",
                                  "Beginnerter","w3wiki",
                                      "Beginnerter","Beginnerter"),
                        people = c(10,12,21,45,23,54,
                                   22,12,32,45),
                        rating = c(4,3,5,7,2,8,1,
                                   10,9,6))
# printing the data frame
print("Original Data frame")
print(data_frame)
 
# creating a line chart for the data
graph <- gvisLineChart(data_frame, options=list(
  legend="bottom"))
 
# plotting the data 
plot(graph)

Output

[1] "Original Data frame"
> print(data_frame)
           group people rating
1       Beginnerter     10      4
2  w3wiki     12      3
3       Beginnerter     21      5
4       Beginnerter     45      7
5  w3wiki     23      2
6  w3wiki     54      8
7       Beginnerter     22      1
8  w3wiki     12     10
9       Beginnerter     32      9
10      Beginnerter     45      6

The data can also be plotted taking into consideration the functions. For instance, the line can be drawn for x and x^2 respectively.

R

# installing the required libraries
library(googleVis)
library(tidyverse)
 
# creating a data frame
data_frame = data.frame(x = c(1,2,3,4,5),
                        y = x^2
                        )
# printing the data frame
print("Original Data frame")
print(data_frame)
 
# creating a line chart for the data
graph <- gvisLineChart(data_frame, options=list(
  legend="bottom"))
# plotting the data 
plot(graph)

Output

[1] "Original Data frame"
> print(data_frame)
  x  y
1 1  1
2 2  4
3 3  9
4 4 16
5 5 25

How to Add Horizontal Discrete Legend Below the Chart in Ggvis

Add Horizontal Discrete Legend Below the Chart in Ggvis

R

R

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