1.1 if-else 经典的流程控制关键字是if-else,并可以把多个if-else语句连接到一起 #if-else分支控制流语法 if ( test_expression1) { statement1 } else if ( test_expression2) { statement2 } else { statement3 } 1. 2. 3. 4. 5. 6. 7. 8. 示例 #嵌套用法 > a=5 > b=6 > if (a<b)...
1、R中重复值的处理 unique函数作用：把数据结构中，行相同的数据去除。 #导入CSV数据 data <- read....
for循环 for (var in seq) statment while while (cond) statement if-else if(cond) statement1 else statement2 自编函数 myfunction <- function(arg1,arg2, ... ){ statements return(object) } 4.reshape2包 融合 library(reshape2) mydata <-data.frame(ID = c(1,1,2,2),Time=c(1,2,1,2...
x <- 3 # check if x is greater than 0 if (x > 0) { print("The number is positive") } print("Outside if statement") Output [1] "The number is positive" [1] "Outside if statement" In the above program, the test condition x > 0 is true. Hence, the code inside parenthesis...
You're making no use of the input. Since you assign the value 2 to x the code will always print "even", no matter what the input is. 9th Sep 2021, 10:45 PM Simon Sauter + 4 x <- readLines('stdin') num <- as.integer(x[1]) if(num%%2==0) print("even") else print("odd...
The basic syntax for the If statement is given below: if(Boolean_expression) { This block of code will execute if the Boolean expression returns TRUE. } For example: x <- “Intellipaat” if(is.character(x)) { print("X is a Character") ...
2. Code 2.1 Editing 2.1.1 General ☑️Insert spaces for Tab 为制表符插入空格 在活动文件中编辑时按下Tab键插入指定数目空格而不是制表符 在控制台按下Tab键时始终以4个空格替代 请注意,文中所有选项的勾选状态及参数设置即我们的推荐设置。
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Our if statement’s condition should be an expression that evaluates toTRUEorFALSE. If the expression returns TRUE, then the program will execute all code between the brackets { }. If FALSE, then no code will be executed. Knowing this, let’s look at an example of an if statement that ...
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