Writing Function to convert temperature in R

1. Introduction

The Fahrenheit scale is used to measure temperature in the United States, while the Celsius scale is used in other countries. The purpose of this tutorial is to write R function to convert Fahrenheit scale to Celsius scale and vice versa.

2.1 Formula converting Fahrenheit to Celsius.

This is a formula for converting Fahrenheit to Celsius.

\[ C = (F-32) \frac{5}{9} \] For example we want to convert 98.6 °F to °C. \[ C = (98.6-32) \frac{5}{9} = 37 \]

2.2 Function converting Fahrenheit to Celsius.

f_to_c <- function(temp_F){
temp_C <- (temp_F -32)*5/9
return(temp_C)
}

We put 98.6to function f_to_c(98.6), then the this is the value we need.

f_to_c(98.6)

## [1] 37

(98.6 °F) equall to 37 °C

3.1 Formula converting Celsius to Fahrenheit.

Similarly, we can write function convert Celsius to Fahrenheit.

This is a formula for converting Celsius to Fahrenheit.

\[ F = C* \frac{9}{5} +32 \] For example we want to convert 37°C to °F. \[ F = 37 *\frac{9}{5} + 32 = 98.6 \]

3.2 Function converting Celsius to Fahrenheit

c_to_f <- function(temp_c){
  temp_f <- temp_c*9/5 +32
  return(temp_f)
}

We convert 37°C to °F based this above function by typing c_to_f(37).

c_to_f(37)

## [1] 98.6

Hence, we have written function calculating 37°C equally to 98.6°F