How to put margins on tables or arrays in R?

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The post How to put margins on tables or arrays in R? appeared first on Data Science Tutorials

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How to put margins on tables or arrays in R?, I’ll show you how to use the addmargins function in the R programming language to add margins to tables or arrays in this post.

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The addmargins function will be used in the tutorial’s two examples to annotate the margin values on table objects.

To be more specific, the instruction includes the following details:

Providing Examples of Data

The data listed below will serve as the foundation for this R tutorial.

data <- data.frame(x1 = c(LETTERS[1:3], "B", "B", "C"),x2 = letters[1:2])
data                                         
   x1 x2
1  A  a
2  B  b
3  C  a
4  B  b
5  B  a
6  C  b

Consider the previous table. It demonstrates how the sample data frame has two variables and six rows.

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Then, using these data, we can build a table object (a contingency table).

tab <- table(data)                        
tab
    x2
x1  a b
  A 1 0
  B 1 2
  C 1 1

Example 1:-Incorporate Sum Margins into the Contingency Table.

Addmargins() Function Utilization

I’ll show you how to add the sum of each row and column to a table’s margins using the addmargins function in Example 1.

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Take into account the R code below:

tab_sum <- addmargins(tab, FUN = sum)   
tab_sum                                       
         x2
x1    a b sum
  A   1 0   1
  B   1 2   3
  C   1 1   2
  sum 3 3   6

As you can see, we have a row and column that contain the sum margins of our data that are annotated.

 Hope you enjoyed it.

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The post How to put margins on tables or arrays in R? appeared first on Data Science Tutorials

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