Positive or Negative in R » Data Science Tutorials

Positive or Negative in R, we will learn how to use the sign function in R to determine whether a numeric value is positive or negative.

The sign function returns the signs of numeric elements, with a value of 1 for positive numbers, 0 for zero, and -1 for negative numbers.

Basic R Syntax

sign(5)           # Basic R syntax of sign function

Example: Return whether Number is Positive or Negative

We can use the sign function to check whether a number is positive or negative.

For example, let’s create a vector of numbers from -2 to 5 and apply the sign function:

sign(-2:5)        # Apply sign function
# -1 -1  0  1  1  1  1  1

This returns the signs of the elements in the vector.

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The first two elements are negative (indicated by -1), the third element is zero (indicated by 0), and the remaining elements are positive (indicated by +1).

Example: Checking Multiple Numbers

We can also use the sign function to check multiple numbers at once.

For example, let’s create a vector of numbers and apply the sign function:

numbers <- c(-3, 0, 2, -5, 7)
sign(numbers)     # Apply sign function to multiple numbers
# -1  0  1 -1  1

This returns the signs of the elements in the vector.

The first element is negative (indicated by -1), the second element is zero (indicated by 0), the third element is positive (indicated by +1), and the fourth element is negative (indicated by -1), and the fifth element is positive (indicated by +1).