R Markdown YAML "Scanner Error: Display Values ..."
I noticed this problem when knitting all types of files (html, pdf, word). To make sure there was no problem in my program, I went ahead and ran the default .rmd file you get when you create a new markdown. In every case it is knitted correctly, but I always see it at the end. I have searched on the internet and here but cannot find an explanation.
Error in yaml::yaml.load(string, ...) :
Scanner error: mapping values are not allowed in this context at line 6, column 19
Error in yaml::yaml.load(string, ...) :
Scanner error: mapping values are not allowed in this context at line 6, column 19
Error in yaml::yaml.load(string, ...) :
Scanner error: mapping values are not allowed in this context at line 4, column 22
Here is my default YAML
---
title: "Untitled"
author: "Scott Jackson"
date: "April 20, 2017"
output: word_document
---
Line 4, column 22 is the space between 7 and "I'm not sure where line 6, column 19 is, but this line is a dash at the bottom
Any ideas?
Thank.
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I realize this question has gone unanswered for a while, but maybe someone else might benefit. I had the same error message and realized that I had an additional header command in my yaml. I cannot reproduce your exact error, but I get the same message with different row / column references:
---
title: "Untitled"
author: "Scott Jackson"
date: "April 20, 2017"
output: output: word_document
---
Error in yaml::yaml.load(string, ...) :
Scanner error: mapping values are not allowed in this context at line 4, column 15
Calls: <Anonymous> ... parse_yaml_front_matter -> yaml_load_utf8 -> <Anonymous>
Execution halted
Line 4 of column 15 appears to refer to the second colon after the second "output".
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I'm guessing this error is happening with your content instead of your yaml block. Because there is no additional content display, so I'll give a minimal example.
> library(yaml)
> library(magrittr)
> "
+ ---
+ title: 'This is a title'
+ output: github_document
+ ---
+
+ some content
+ " %>%
+ yaml.load()
$title
[1] "This is a title"
$output
[1] "github_document"
It works well. And here's another example.
> "
+ ---
+ title: 'This is a title'
+ output: github_document
+ ---
+
+ some content
+ some content: some content
+ " %>%
+ yaml.load()
Error in yaml.load(.) :
Scanner error: mapping values are not allowed in this context at line 8, column 13
Errors occur on line 8. Because there is a key-value pair not in the yaml block. yaml.load
not smart enough for me. A workaround for me to just extract all lines above the second ---
.
> text <- "
+ ---
+ title: 'This is a title'
+ output: github_document
+ ---
+
+ some content
+ some content: some content
+ "
> library(xfun)
> read_lines(text,n_max = 5) %>%
+ yaml.load()
$title
[1] "This is a title"
$output
[1] "github_document"
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