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How to Make Boxplots and Boxplots With Groups in R (R Tutorial 2.2) Video Lecture | Mastering R Programming: For Data Science and Analytics - Database Management

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Video Timeline
Video Timeline
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00:05 What is a box plot & when should we use it
00:25 How to produce a "box plot" in R? By using "box.plot" function
00:30 How to access the help menu in R
00:56 How to report the "minimum", "first quartile", "median", "third quartile", & "maximum" in a "box plot" in R?
01:31 How to add a title to a boxplot in R using the "main" argument
01:39 How to label the x-axis or the y-axis of a "box plot" using "xlab" or "ylab" arguments
01:52 How to change the limits for the y-axis of a "box plot" in R using the "ylim" argument
02:04 How to rotate the values on the y-axis of a "box plot" using "las" argument
02:13 How to produce side-by-side box plots in R using "boxplot" & "~" (separate) functions
02:53 How to add a title to side-by-side boxplots in R using the "main" argument
03:04 How to produce side-by-side box plots in R using the "square brackets" to subset data
03:35 Double equal sign (==) , what does this mean?
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FAQs on How to Make Boxplots and Boxplots With Groups in R (R Tutorial 2.2) Video Lecture - Mastering R Programming: For Data Science and Analytics - Database Management

1. How do I create a boxplot in R?
Ans. To create a boxplot in R, you can use the "boxplot()" function. This function takes in a numerical vector or a data frame as input and generates a boxplot. For example, if you have a vector named "data" containing your numerical data, you can create a basic boxplot by simply running "boxplot(data)".
2. Can I create boxplots with groups in R?
Ans. Yes, you can create boxplots with groups in R. To do this, you need to use the "boxplot()" function along with the "formula" argument. The formula argument allows you to specify the grouping variable. For example, if you have a numerical vector named "data" and a categorical variable named "group", you can create boxplots for each group by running "boxplot(data ~ group)".
3. How can I customize the appearance of boxplots in R?
Ans. You can customize the appearance of boxplots in R by using various parameters in the "boxplot()" function. Some common parameters include "col" to change the color of the boxes, "border" to change the color of the box borders, "names" to specify custom group names, and "main" to add a title to the plot. For example, you can change the box color to blue by running "boxplot(data, col = "blue")".
4. Is it possible to add a horizontal line to a boxplot in R?
Ans. Yes, you can add a horizontal line to a boxplot in R. To do this, you can use the "abline()" function. For example, if you want to add a horizontal line at y = 10 to your boxplot, you can run "abline(h = 10)". This will draw a horizontal line at the specified y-value.
5. Can I save the boxplot as an image file in R?
Ans. Yes, you can save the boxplot as an image file in R. After creating the boxplot, you can use the "png()", "jpeg()", or "pdf()" functions to open a graphics device in the desired format. Then, you can use the "dev.off()" function to close the graphics device and save the plot. For example, to save the boxplot as a PNG image file named "boxplot.png", you can run the following code: ```R png("boxplot.png") boxplot(data) dev.off() ```
Video Timeline
Video Timeline
arrow
00:05 What is a box plot & when should we use it
00:25 How to produce a "box plot" in R? By using "box.plot" function
00:30 How to access the help menu in R
00:56 How to report the "minimum", "first quartile", "median", "third quartile", & "maximum" in a "box plot" in R?
01:31 How to add a title to a boxplot in R using the "main" argument
01:39 How to label the x-axis or the y-axis of a "box plot" using "xlab" or "ylab" arguments
01:52 How to change the limits for the y-axis of a "box plot" in R using the "ylim" argument
02:04 How to rotate the values on the y-axis of a "box plot" using "las" argument
02:13 How to produce side-by-side box plots in R using "boxplot" & "~" (separate) functions
02:53 How to add a title to side-by-side boxplots in R using the "main" argument
03:04 How to produce side-by-side box plots in R using the "square brackets" to subset data
03:35 Double equal sign (==) , what does this mean?
More
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