“else”中出现意外的“else”错误 [英] Unexpected 'else' in "else" error

问题描述

我收到此错误：

错误：else中意外的其他

Error: unexpected 'else' in " else"

从这个 if，else 语句：

if (dsnt<0.05) {
     wilcox.test(distance[result=='nt'],distance[result=='t'],alternative=c("two.sided"),paired=TRUE) }
else {
      if (dst<0.05) {
wilcox.test(distance[result=='nt'],distance[result=='t'],alternative=c("two.sided"),paired=TRUE) }
   else {
         t.test(distance[result=='nt'],distance[result=='t'],alternative=c("two.sided"),paired=TRUE)       } }

什么这个有问题吗？

推荐答案

你需要重新排列大括号。您的第一个语句已完成，因此R将其解释为此类并在其他行上生成语法错误。您的代码应如下所示：

You need to rearrange your curly brackets. Your first statement is complete, so R interprets it as such and produces syntax errors on the other lines. Your code should look like:

if (dsnt<0.05) {
  wilcox.test(distance[result=='nt'],distance[result=='t'],alternative=c("two.sided"),paired=TRUE)
} else if (dst<0.05) {
  wilcox.test(distance[result=='nt'],distance[result=='t'],alternative=c("two.sided"),paired=TRUE)
} else {
  t.test(distance[result=='nt'],distance[result=='t'],alternative=c("two.sided"),paired=TRUE)       
} 

更简单地说，如果你有：

To put it more simply, if you have:

if(condition == TRUE) x <- TRUE
else x <- FALSE

然后R读取第一行，因为它完整，完整地运行。当它到达下一行时，它会变成Else？还有什么？因为这是一个全新的陈述。要让R将else解释为前面if语句的一部分，你必须使用大括号告诉R你还没有完成：

Then R reads the first line and because it is complete, runs that in its entirety. When it gets to the next line, it goes "Else? Else what?" because it is a completely new statement. To have R interpret the else as part of the preceding if statement, you must have curly brackets to tell R that you aren't yet finished:

if(condition == TRUE) {x <- TRUE
 } else {x <- FALSE}

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