This post explains how to convert a factor to integer in R, along with examples. Most of R Programmers make mistake while converting a factor variable to integer.

Why to Convert a factor to integer in R?

**Statistical Analysis:**Some statistical analysis functions or algorithms require numeric input. Converting categorical data represented as factors to integers might be necessary for these analyses.**Plotting and Visualization:**Some plots and visualization functions require numeric values.**Efficiency:**For large datasets, using integers instead of factors can improve memory usage and computation speed.

*Let's create a factor variable*a <- factor(c(2, 4, 3, 3, 4))Incorrect Way

str(a)

a1 = as.integer(a)

str(a1)

**Output**

[1] 1 3 2 2 3

**as.integer()** returns a vector of the levels of your factor and not the original values.

a2 = as.integer(as.character(a))

str(a2)

**Output**

[1] 2 4 3 3 4

Could you explain more about why you need to do this? Sort of a basic question, but would be helpful for us less experienced R users.

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