# Convert Logical to Dummy Vector in R (2 Examples)

In this tutorial, Iâ€™ll show how to **replace logicals by a 0/1 dummy indicator** in the R programming language.

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## Example 1: Convert Logical to Dummy Vector Using as.numeric Function

This example shows how to create a dummy vector based on a logical vector using the R programming language.

First, we have to create a logical vector in R:

x1 <- c(TRUE, FALSE, FALSE, TRUE, FALSE, TRUE) # Create logical vector x1 # Print logical vector # [1] TRUE FALSE FALSE TRUE FALSE TRUE

The previous output of the RStudio console shows the structure of our logical variable. It is a sequence with a length of six containing TRUE and FALSE values.

If we want to convert this logical data object to a numeric 0/1 dummy, we can use the as.numeric function as shown below:

x1_dummy <- as.numeric(x1) # Convert logical to dummy vector x1_dummy # Print dummy vector # [1] 1 0 0 1 0 1

The previous output of the RStudio console shows our final result â€“ A 0/1 dummy indicator.

Please note that we could apply the same R code to a data frame column instead of a vector object.

However, in the next example I want to show you a typical problem when dealing with logical values. So keep on reading!

## Example 2: Convert Logical Vector with Character Class to Dummy

A common issue with logical values is that the TRUE/FALSE values does not have the logical class, but the character class.

This is a problem that often occurs when you import data from an Excel or CSV file to R.

In this example, Iâ€™ll illustrate how to handle this problem in R.

First, we have to create another example vector:

x2 <- c("TRUE", "FALSE", "FALSE", "TRUE", "FALSE", "TRUE") # Create character vector x2 # Print character vector # [1] "TRUE" "FALSE" "FALSE" "TRUE" "FALSE" "TRUE"

Have a look at the previous output: You can see based on the quotes, that our new example variable has the character class.

Letâ€™s double-check that using the class function:

class(x2) # Check class of vector # [1] "character"

The class function confirms our first guess: Our example vector has the character data type.

If we now want to convert our data to a dummy, we first need to convert our vector to the logical class using the as.logical function:

x2_logical <- as.logical(x2) # Convert character to logical x2_logical # Print logical vector # [1] TRUE FALSE FALSE TRUE FALSE TRUE

Letâ€™s check the class of our new data object:

class(x2_logical) # Check class of updated vector # [1] "logical"

Now, we are dealing with a real logical object.

In the next step, we can apply the as.numeric function as we already did in the first example:

x2_dummy <- as.numeric(x2_logical) # Convert logical to dummy vector x2_dummy # Print dummy vector # [1] 1 0 0 1 0 1

The final output is the same dummy indicator as in Example 1.

## Video & Further Resources

If you need further info on the R programming syntax of this tutorial, you might want to watch the following video which I have published on my YouTube channel. In the video instruction, I show the content of this post in RStudio:

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Furthermore, you might have a look at some of the other articles on my website. You can find some posts below:

- Convert Vector to List in R
- Convert Factor to Character Class in R
- Convert Matrix to Vector in R
- Convert Data Frame Row to Vector
- R Programming Tutorials

To summarize: In this R programming tutorial you have learned how to **convert a logical data object to a dummy vector**. In case you have additional questions, let me know in the comments section.

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