if (x[i] > 0){:缺少TRUE/FALSE需要的值[复制]

This question already has an answer here:

这个问题已经有了答案:

Error in if/while (condition) {: missing Value where TRUE/FALSE needed 2 answers
if/while(条件){:缺失值，TRUE/FALSE需要2个答案。

I have this line in my code to create dots for a dot-density map. The function I'm misusing is dotsInPolys in the maptools package. I get this error when I run it and I'm not sure what it means. Can anyone help?

我在我的代码中有这条线，为点密度图创建点。我在maptools包中误用的函数是dotsInPolys。当我运行它时，我得到这个错误，我不确定它的意思。谁能帮忙吗?

NSWdots <- dotsInPolys(NSW, as.integer(datajoin$pop.10))

NSWdots < - dotsInPolys(新南威尔士州as.integer(datajoin pop.10美元))

NSW is a shapefile and datajoin$pop.10 is a vector of numbers.

NSW是一个shapefile和datajoin$pop。10是一个数字的向量。

The given error is:

给定的误差:

Error in if (x[i] > 0) { : missing value where TRUE/FALSE needed

if (x[i] > 0){:缺少TRUE/FALSE需要的值。

1 个解决方案

#1

Somewhere in your dataframe there are some NA values and you get the error.

在dataframe的某个地方有一些NA值，会得到错误。

Look what happens here:

看看发生了什么:

 NA > 0 #this returns NA
[1] NA

If I use it in an if statement:

如果我在If语句中使用它:

> if (NA > 0) print('Hello')
Error in if (NA > 0) print("Hello") : 
  missing value where TRUE/FALSE needed

I get the same error as you.

我和你有同样的错误。

In your case some instance of x[i] is NA and the above error is returned. You need to figure out a way to remove/deal with the NA values in your data.

在您的例子中，x[i]的某个实例是NA，并且返回上面的错误。您需要找到一种方法来删除/处理数据中的NA值。

#1