对于循环而言，dygraph在R中不起作用

在dygraph上有一些奇怪的行为。

当为dygraph使用for循环时，我没有得到任何结果。

 library(dygraphs) lungDeaths <- cbind(mdeaths, fdeaths) for(i in 1:2){ dygraph(lungDeaths[, i]) } 

另一方面，当我使用lapply我得到了预期的结果

 lapply(1:2, function(i) dygraph(lungDeaths[, i])) 

我实际上想在我自己的数据集上使用R Markdown的for循环，并遍历不同的列，但是即使当我使用lapply “解决方法”时，也不会绘制dygraphs

R Markdown代码

 --- title: "Untitled" author: "dimitris_ps" date: "28 May 2015" output: html_document --- ```{r} library(dygraphs) lungDeaths <- cbind(mdeaths, fdeaths) lapply(1:2, function(i) dygraph(lungDeaths[, i])) ``` 

而当我运行它逐列的工作

 --- title: "Untitled" author: "dimitris_ps" date: "28 May 2015" output: html_document --- ```{r echo=FALSE} library(dygraphs) lungDeaths <- cbind(mdeaths, fdeaths) ``` ```{r} dygraph(lungDeaths[, 1]) dygraph(lungDeaths[, 2]) ``` 

任何帮助将不胜感激。

会话信息

 R version 3.2.0 (2015-04-16) Platform: x86_64-w64-mingw32/x64 (64-bit) Running under: Windows 7 x64 (build 7601) Service Pack 1 locale: [1] LC_COLLATE=English_United Kingdom.1252 LC_CTYPE=English_United Kingdom.1252 [3] LC_MONETARY=English_United Kingdom.1252 LC_NUMERIC=C [5] LC_TIME=English_United Kingdom.1252 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] dygraphs_0.4.3 devtools_1.7.0 loaded via a namespace (and not attached): [1] htmltools_0.2.6 tools_3.2.0 yaml_2.1.13 rmarkdown_0.6.1 digest_0.6.8 

Answer 1

只需在htmltools::tagList()包装lapply()的列表输出，例如

 ```{r} library(dygraphs) lungDeaths <- cbind(mdeaths, fdeaths) res <- lapply(1:2, function(i) dygraph(lungDeaths[, i])) htmltools::tagList(res) ```