Ошибка обработки в data.frame (..., check.names = FALSE) с помощью knitr и read.csv

Question

У меня есть этот игрушечный пример Rnw, где я хочу загрузить некоторые данные и использовать функцию сводки. Я потерпел неудачу при компиляции и все время выкидываю Error in data.frame(..., check.names = FALSE), и я не знаю почему?

Я ценю любой совет. Спасибо.

\documentclass[]{article}
\begin{document}
<<>>=
x <- read.csv("stockres.txt")
summary(x)
@
\end{document}

, откуда stockres взято

https://raw.githubusercontent.com/b2q/SPM-Ready/master/QID-670-SPMhistogram/stockres.txt

Информация журнала:

 > knitr::knit2pdf("problem-knitr.Rnw")


processing file: problem-knitr.Rnw
  |.................................                                                                 |  33%
  ordinary text without R code

  |.................................................................                                 |  67%
label: unnamed-chunk-1
Quitting from lines 4-6 (problem-knitr.Rnw) 
Error in data.frame(..., check.names = FALSE) : 
  arguments imply differing number of rows: 10, 0

This моя сессияInfo.

> sessionInfo()
R version 4.0.0 (2020-04-24)
Platform: x86_64-suse-linux-gnu (64-bit)
Running under: openSUSE Leap 15.1

Matrix products: default
BLAS:   /usr/lib64/R/lib/libRblas.so
LAPACK: /usr/lib64/R/lib/libRlapack.so

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

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

other attached packages:
[1] ggplot2_3.3.0 knitr_1.27   

loaded via a namespace (and not attached):
 [1] Rcpp_1.0.4       magrittr_1.5     tidyselect_0.2.5 munsell_0.5.0    colorspace_1.4-1 R6_2.4.1        
 [7] rlang_0.4.5      fansi_0.4.1      stringr_1.4.0    highr_0.3        dplyr_0.8.5      tools_4.0.0     
[13] grid_4.0.0       gtable_0.3.0     xfun_0.8         cli_2.0.1        withr_2.1.2      ellipsis_0.3.0  
[19] digest_0.6.25    assertthat_0.2.1 tibble_3.0.0     lifecycle_0.2.0  crayon_1.3.4     formatR_1.0     
[25] farver_2.0.3     purrr_0.3.3      codetools_0.2-16 vctrs_0.2.4      glue_1.3.1       evaluate_0.14   
[31] labeling_0.3     stringi_1.4.6    compiler_4.0.0   pillar_1.4.3     scales_1.1.0     Cairo_1.5-12    
[37] pkgconfig_2.0.2