You can easily convert an integer to a numeric using the as.numeric function or a numeric to an integer using the as.integer function. Let’s look at some common conversion or casting scenarios. In R, you can convert data from one type to a different type. Similarly, you can use the class and is.logical functions to check if a data value belongs to the logical type. You have already seen one logical operation in previous slides when we used the is.numeric or is.character functions to check if a data value is of the numeric or character type. In R, boolean data is represented as the logical type and has two values, TRUE and FALSE. For example, you could use it to compare two values or check if a statement is true or false. Another common data type is boolean, which is typically used to represent the result of logical operations. Like the numeric or integer types, you can use the class function to check the data type or use the is.character function to check if any data belongs to the character type. For example, a single character A with single quotes, the sentence “I like the R language”, and an email address with double quotes are all the character type. In R, textual data is defined as the character type. Textual data is another common data type. As with integer, you can use is.numeric to check if 1 is a numeric type. If you use the class function on the number 1, it returns its type as numeric. In R, numeric data is written with only numbers without the suffix L. They are also numeric, and you can continue the selection infinitely. Similarly, consider the numbers between 0.1 and 0.2.
Consider the numbers between 0 and 1. You can select numbers in between them. Their type is also numeric. The numeric data type includes the integer, and all the numbers in between the integers. Another more generic number data type is called numeric. The is.integer function returns a boolean value TRUE for the value 1L, meaning it is an integer. You can also use the is.integer function to check if 1L is an integer. If you use an R function called class on an integer like 1L, R will return its data type as integer. In R, integer numbers are written with an uppercase L suffix, for example, 0L or 1L. The integer type includes zero, positive counting numbers such as 1, 2, and 3, and negative counting numbers such as -1, -2, and -3. The integer type in R is a similar concept as whole numbers without a decimal.
#Basic data science in r how to#
Thus, before you learn how to process data using R, it is fundamental that you understand its common data types. Each type must be defined and processed properly by programming languages to achieve the correct result. Data has many types, like numbers, factors, text, and dates. No matter how simple or complex a program is, its core function is always to define and process data. After watching this video, you will be able to describe the basic data types in the R language and explain data type conversion.
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