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How to understand the conditions and looping sentences in R language? in order to solve this problem, this article introduces the corresponding analysis and solution in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.

1. If... Else statement

Decision-making is an important part of programming. You can use conditional if...else statements in R to implement decisions.

If statement

Its syntax is:

If (test_expression) {

Statement

}

If test_expression evaluates to TRUE, the statement in curly braces is executed, but if it is FALSE, the statement in curly braces is not executed.

The flow chart is as follows:

Let's look at an example:

X 0) {

Print ("Positive number")

}

The output is:

[1] "Positive number"

In this case, test_expression can also be a logical or numeric vector, but only the first element is considered and a warning is given.

If it is a numeric vector, only 0 is represented as FALSE and the rest is represented as TRUE. Look at an example:

X

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