entityMap|blocks|key|7v422|text|你没有定义向量，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|82too|，然后再尝试设置它的子集。|426bj|也是基包中的函数，因此|n5ni|正在尝试对该函数进行子集...这说不通。|ffprv|你可能定义了|iid5|在您之前的R会话中，但是忘记将代码复制到您的脚本中。^0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|M|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|N|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|O|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|P|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|Q|9|@]|A|@]|B|$]]|$2|K|4|L|6|7|8|R|9|@]|A|@]|B|$]]]]

You don't define the vector, <code>url</code>, before trying to subset it. <code>url</code> is also a function in the base package, so <code>url[i]</code> is attempting to subset that function... which doesn't make sense.

You probably defined <code>url</code> in your prior R session, but forgot to copy that code to your script.

entityMap|blocks|key|2fg9l|text|通常，此错误消息表示您已尝试在函数上使用索引。例如，您可以使用以下命令重现此错误消息|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4ufln|mean[1]
##+Error+in+mean[1]+:+object+of+type+'closure'+is+not+subsettable
mean[[1]]
##+Error+in+mean[[1]]+:+object+of+type+'closure'+is+not+subsettable
mean$a
##+Error+in+mean$a+:+object+of+type+'closure'+is+not+subsettable|code-block|syntax|javascript|6tvpu|错误消息中提到的闭包(松散地说)是函数和在调用函数时存储变量的环境。|e5240|在这个特定的例子中，正如Joshua提到的，您正在尝试访问|dtcr4|函数作为变量。如果您定义了一个名为的变量|8p8ja|，然后错误就消失了。|3ejqm|作为一个很好的实践，您通常应该避免使用base-R函数来命名变量。(调用变量|3slpq|是此错误的常见来源。)|fhf1j|对于尝试子集运算符或关键字，有几个相关的错误。|9jtbs|`%2B`[1]
##+Error+in+`%2B`[1]+:+object+of+type+'builtin'+is+not+subsettable
`if`[1]
##+Error+in+`if`[1]+:+object+of+type+'special'+is+not+subsettable|9jnop|如果你在|2lju4|，最有可能的原因是您正在尝试使用|ek2qp|表达式，而不使用括号将其作为函数调用。|cjuj0|library(shiny)
reactive_df+<-+reactive({
++++data.frame(col1+=+c(1,2,3),
+++++++++++++++col2+=+c(4,5,6))
})|6u6jr|虽然我们经常在shiny中使用反应式表达式，就好像它们是数据帧一样，但它们实际上是|a8au6|函数|4jc6c|返回数据帧(或其他对象)。|b2gcs|isolate({
++++print(reactive_df())
++++print(reactive_df()$col1)
})
++col1+col2
1++++1++++4
2++++2++++5
3++++3++++6
[1]+1+2+3|1or6v|但是如果我们试图在没有括号的情况下对它进行子集，那么我们实际上是在尝试对一个函数进行索引，并且我们得到了一个错误：|ed8ht|isolate(
++++reactive_df$col1
)
Error+in+reactive_df$col1+:+object+of+type+'closure'+is+not+subsettable^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|1H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|1I|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|1J|9|@]|A|@]|B|$]]|$2|J|4|K|6|7|8|1K|9|@]|A|@]|B|$]]|$2|L|4|M|6|7|8|1L|9|@]|A|@]|B|$]]|$2|N|4|O|6|7|8|1M|9|@]|A|@]|B|$]]|$2|P|4|Q|6|7|8|1N|9|@]|A|@]|B|$]]|$2|R|4|S|6|7|8|1O|9|@]|A|@]|B|$]]|$2|T|4|U|6|7|8|1P|9|@]|A|@]|B|$]]|$2|V|4|W|6|E|8|1Q|9|@]|A|@]|B|$F|G]]|$2|X|4|Y|6|7|8|1R|9|@]|A|@]|B|$]]|$2|Z|4|10|6|7|8|1S|9|@]|A|@]|B|$]]|$2|11|4|12|6|7|8|1T|9|@]|A|@]|B|$]]|$2|13|4|14|6|E|8|1U|9|@]|A|@]|B|$F|G]]|$2|15|4|16|6|7|8|1V|9|@]|A|@]|B|$]]|$2|17|4|18|6|7|8|1W|9|@]|A|@]|B|$]]|$2|19|4|1A|6|7|8|1X|9|@]|A|@]|B|$]]|$2|1B|4|1C|6|E|8|1Y|9|@]|A|@]|B|$F|G]]|$2|1D|4|1E|6|7|8|1Z|9|@]|A|@]|B|$]]|$2|1F|4|1G|6|E|8|20|9|@]|A|@]|B|$F|G]]]]

In general this error message means that you have tried to use indexing on a function. You can reproduce this error message with, for example

<pre><code>mean[1]
## Error in mean[1] : object of type 'closure' is not subsettable
mean[[1]]
## Error in mean[[1]] : object of type 'closure' is not subsettable
mean$a
## Error in mean$a : object of type 'closure' is not subsettable
</code></pre>

The closure mentioned in the error message is (loosely) the function and the environment that stores the variables when the function is called.

<hr>

In this specific case, as Joshua mentioned, you are trying to access the <a href="https://www.rdocumentation.org/packages/base/topics/connections" rel="noreferrer"><code>url</code></a> function as a variable. If you define a variable named <code>url</code>, then the error goes away.

As a matter of good practise, you should usually avoid naming variables after base-R functions. (Calling variables <a href="https://www.rdocumentation.org/packages/utils/topics/data" rel="noreferrer"><code>data</code></a> is a common source of this error.) 

<hr>

There are several related errors for trying to subset operators or keywords.

<pre><code>`+`[1]
## Error in `+`[1] : object of type 'builtin' is not subsettable
`if`[1]
## Error in `if`[1] : object of type 'special' is not subsettable
</code></pre>

<hr>

If you're running into this problem in <code>shiny</code>, the most likely cause is that you're trying to work with a <code>reactive</code> expression without calling it as a function using parentheses.

<pre><code>library(shiny)
reactive_df &lt;- reactive({
 data.frame(col1 = c(1,2,3),
 col2 = c(4,5,6))
})
</code></pre>

While we often work with reactive expressions in shiny as if they were data frames, they are actually functions that return data frames (or other objects).

<pre><code>isolate({
 print(reactive_df())
 print(reactive_df()$col1)
})
 col1 col2
1 1 4
2 2 5
3 3 6
[1] 1 2 3
</code></pre>

But if we try to subset it without parentheses, then we're actually trying to index a function, and we get an error:

<pre><code>isolate(
 reactive_df$col1
)
Error in reactive_df$col1 : object of type 'closure' is not subsettable
</code></pre>

entityMap|blocks|key|bf3eb|text|我想你是故意的|type|unstyled|depth|inlineStyleRanges|entityRanges|data|e4cas|而不是|cephd|..。如果是，请替换|3kcgo|使用|dcqvi|..。^0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|K|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|L|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|M|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|N|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|O|9|@]|A|@]|B|$]]]]

I think you meant to do <code>url[i] &lt;- paste(...</code>

instead of <code>url[i] = paste(...</code>. If so replace <code>=</code> with <code>&lt;-</code>.

entityMap|blocks|key|ae4eg|text|我在尝试删除事件reactive中的ui元素时遇到了这个问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|f3tuu|myReactives+<-+eventReactive(input$execute,+{
++++...+#+Some+other+long+running+function+here
++++removeUI(selector+=+"#placeholder2")
})|code-block|syntax|javascript|2db05|我得到了这个错误，但不是在removeUI元素行上，因为某种原因，它在下一个观察者中。从eventReactive中取出removeUI方法并将其放在其他地方可以消除这个错误。^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|J|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|K|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|L|9|@]|A|@]|B|$]]]]

I had this issue was trying to remove a ui element inside an event reactive:

<pre><code>myReactives &lt;- eventReactive(input$execute, {
 ... # Some other long running function here
 removeUI(selector = "#placeholder2")
})
</code></pre>

I was getting this error, but not on the removeUI element line, it was in the next observer after for some reason. Taking the removeUI method out of the eventReactive and placing it somewhere else removed this error for me.

entityMap|blocks|key|50rva|text|如果出现类似错误|type|unstyled|depth|inlineStyleRanges|entityRanges|data|c8b53|警告:closure中出错：‘$’类型的对象不可子集|b6r3i|没有可用的堆栈跟踪|17v25|只需使用:：例如添加相应的包名即可。|5200h|而不是标记(....)|7i5hg|write+shiny::tags(....)^0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|M|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|N|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|O|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|P|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|Q|9|@]|A|@]|B|$]]|$2|K|4|L|6|7|8|R|9|@]|A|@]|B|$]]]]

In case of this similar error 
Warning: Error in $: object of type 'closure' is not subsettable
 [No stack trace available]

Just add corresponding package name using :: 
e.g.

instead of tags(....)

write 
shiny::tags(....)

entityMap|blocks|key|4987e|text|它可能意味着一个未定义的变量。|type|unstyled|depth|inlineStyleRanges|entityRanges|data^0^^$0|$]|1|@$2|3|4|5|6|7|8|C|9|@]|A|@]|B|$]]]]

It could mean an undefined variable.

I was finally able to work out the code for <a href="https://stackoverflow.com/q/11295618/1468366">my scraping</a>. It seemed to be working fine and then all of a sudden when I ran it again, I got the following error message:

<pre><code>Error in url[i] = paste("http://en.wikipedia.org/wiki/", gsub(" ", "_", : 
 object of type 'closure' is not subsettable
</code></pre>

I am not sure why as I changed nothing in my code.

Please advise.

<pre><code>library(XML)
library(plyr)

names &lt;- c("George Clooney", "Kevin Costner", "George Bush", "Amar Shanghavi")

for(i in 1:length(names)) {
 url[i] = paste('http://en.wikipedia.org/wiki/', gsub(" ","_", names[i]) , sep="")

 # some parsing code
}
</code></pre>

Error in <my code> : object of type 'closure' is not subsettable

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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 我终于能够写出 我的刮擦 ..。它似乎工作得很好，然后突然当我再次运行它时，我得到了以下错误消息： Error in url[i] = paste("http://en.wikipedia.org/wiki/", gsub(" ", "_",  :   object of type 'closure' is not ...

问<my code>：'closure‘类型的对象不可子集时出错
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问<my code>：'closure‘类型的对象不可子集时出错
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