The if-block or the body inside the if is executed.If Condition yields false, goto Step 5.The expression can be a logical/numerical vector, but only the first element is taken into consideration. In the case of numeric vector, zero is taken as FALSE, rest as TRUE. But if the expression is FALSE, nothing happens.
For if loop in r code#
You could apply that code on each value you have by hand, but it makes far more sense to automate this task. Line 6 - The backslash ( ) in front of the single quote ( ) is needed as the single quote has a special meaning for bash and we dont want that special meaning. You can have as many commands here as you like. If the expression is true, the statement gets executed. Sometimes when making choices using R, you can use only a single value to base your choice on. Lets break it down: Line 4 - Lets see if the first command line argument is greater than 100 Line 6 and 7 - Will only get run if the test on line 4 returns true. #statement to execute if condition is true
For if loop in r update#
It is used to decide whether a certain statement or block of statements will be executed or not i.e if a certain condition is true then a block of statement is executed otherwise not. Typically you would want to update another variable that you would continue using after the for loop. It is one of the easiest decision-making statements. As used above, apply family of functions in base R ( apply(), lapply(), tapply(), etc) are a great way to go about this, but even in the functional programming universe there is one package which has emerged as a. If statement is one of the Decision-making statements in the R programming language. In fact, seasoned R users rarely ever use loops and resort to functional programming techniques to solve all iterative tasks.