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How to plot a graph in R using CSV file ?

  • Difficulty Level : Basic
  • Last Updated : 26 Mar, 2021

To plot a graph in R using a CSV file, we need a CSV file with two-column, the values in the first column will be considered as the points at the x-axis and the values in the second column will be considered as the points at the y-axis. In this article, we will be looking at the way to plot a graph using a CSV file in R language.

Approach

  • Import csv file
  • Pass required parameters to plot function
  • Plot graph
  • Display plot

Functions Used:

  • To import/read the CSV file to the R console, the user must need to use the read.csv() function in R.This function will read a CSV file available in your current working directory.

Syntax:

read.csv(file)



  • plot() function for plotting of R objects. With the provided parameters this function returns a scatter plot by default.

Syntax:

plot(x,y,main,xlab,ylab,sub,asp)

Parameters:

  • x:-the x coordinates of points in the plot
  • y:-the y coordinates of points in the plot
  • main:-an overall title for the plot
  • sub:-a subtitle for the plot
  • xlab:-a title for the x-axis
  • ylab:-a title for the y-axis
  • asp:-the y/x aspect ratio

Return:

Scatter plot of the given x and y values.

Example:

R




data=read.csv('input_gfg.csv')
  
print(data)
  
plot(x = data$x,y = data$y,
     xlab = "x-axis",
     ylab = "y-axis",
     main = "Plot"
)

Output:

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