在RStudio的RStudio中运行块时，如何打印tibbles？

Question

我无法通过在RStudio中的R笔记本中运行块来打印由下面的CSV文件创建的Tibble。下面的示例打印来自read_csv的有关解析的消息，但不打印df。然而，当我预览笔记本时，数据框就会被打印出来。当使用R控制台输入代码时，数据帧也被打印出来。

---
title: "Min Example"
output: html_notebook
---

```{r chunk}

图书馆(重新登记)

图书馆(Tibble)

df <- read_csv('min.csv')

df

在运行块时，命令头(Df)也不会产生输出，但是汇总(Df)和str(df)确实会在笔记本中产生输出。

我正在使用最新版本的RStudio，1.0.136，我的软件包是最新的。我的会话信息如下

R version 3.3.2 (2016-10-31)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 16.04.1 LTS

locale:
[1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C               LC_TIME=en_US.UTF-8       
[4] LC_COLLATE=en_US.UTF-8     LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8   
[7] LC_PAPER=en_US.UTF-8       LC_NAME=C                  LC_ADDRESS=C              
[10] LC_TELEPHONE=C             LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] tibble_1.2  readr_1.0.0

loaded via a namespace (and not attached):
[1] assertthat_0.1 tools_3.3.2    Rcpp_0.12.8    knitr_1.15.1

CSV文件的内容包括

ID,Year,PubDate,CWE,CVSS,Vendor,Project
CVE-1999-0001,1999,1999-12-30,CWE-20,5.0,freebsd,freebsd
CVE-1999-0002,1998,1998-10-12,CWE-119,10.0,caldera,openlinux
CVE-1999-0003,1998,1998-04-01,NA,10.0,sgi,irix
CVE-1999-0004,1997,1997-12-16,NA,5.0,university_of_washington,pine
CVE-1999-0005,1998,1998-07-20,NA,10.0,university_of_washington,imap
CVE-1999-0006,1998,1998-07-14,NA,10.0,qualcomm,qpopper
CVE-1999-0007,1998,1998-06-26,NA,5.0,ssleay,ssleay
CVE-1999-0008,1998,1998-06-08,NA,10.0,sun,solaris
CVE-1999-0009,1998,1998-04-08,NA,10.0,sgi,irix

使用dput()生成查看数据帧

structure(list(ID = c("CVE-1999-0001", "CVE-1999-0002", "CVE-1999-0003", 
"CVE-1999-0004", "CVE-1999-0005", "CVE-1999-0006", "CVE-1999-0007", 
"CVE-1999-0008", "CVE-1999-0009"), Year = c(1999L, 1998L, 1998L, 
1997L, 1998L, 1998L, 1998L, 1998L, 1998L), PubDate = structure(c(10955, 
10511, 10317, 10211, 10427, 10421, 10403, 10385, 10324), class = "Date"), 
    CWE = c("CWE-20", "CWE-119", NA, NA, NA, NA, NA, NA, NA), 
    CVSS = c(5, 10, 10, 5, 10, 10, 5, 10, 10), Vendor = c("freebsd", 
    "caldera", "sgi", "university_of_washington", "university_of_washington", 
    "qualcomm", "ssleay", "sun", "sgi"), Project = c("freebsd", 
    "openlinux", "irix", "pine", "imap", "qpopper", "ssleay", 
    "solaris", "irix")), class = c("tbl_df", "tbl", "data.frame"
), row.names = c(NA, -9L), .Names = c("ID", "Year", "PubDate", 
"CWE", "CVSS", "Vendor", "Project"), spec = structure(list(cols = structure(list(
    ID = structure(list(), class = c("collector_character", "collector"
    )), Year = structure(list(), class = c("collector_integer", 
    "collector")), PubDate = structure(list(format = ""), .Names = "format", class = c("collector_date", 
    "collector")), CWE = structure(list(), class = c("collector_character", 
    "collector")), CVSS = structure(list(), class = c("collector_double", 
    "collector")), Vendor = structure(list(), class = c("collector_character", 
    "collector")), Project = structure(list(), class = c("collector_character", 
    "collector"))), .Names = c("ID", "Year", "PubDate", "CWE", 
"CVSS", "Vendor", "Project")), default = structure(list(), class = c("collector_guess", 
"collector"))), .Names = c("cols", "default"), class = "col_spec"))

现在可以使用RStudio诊断报告了。

Answer 1

在另一个回答/问题(在这里)中，Kevin说：

这确实是RStudio当前版本中的一个错误:包含日期对象的data.frames在笔记本中没有正确呈现。您可以尝试安装最新的RStudio每日构建并确认问题在那里得到解决：http://dailies.rstudio.com

在升级或降级之间，可以使用print (as.matrix())在代码块中临时打印as.matrix：

```{r}

打印(as.matrix(Df)，引号=假)

模拟头()的行为：

```{r}

打印(as.matrix(Df)，引号= FALSE，max = length(df) * 6)

Answer 2

我可能遇到了一个相似问题，并通过安装1.1.89版本的可用这里来解决这个问题。