LaTeX failed to compile movie lens

skynet451 · February 12, 2022, 9:49am

getting the below error while compiling the markdown file into pdf.

output file: movielens.knit.md

/Applications/RStudio.app/Contents/MacOS/pandoc/pandoc +RTS -K512m -RTS movielens.knit.md --to latex --from markdown+autolink_bare_uris+tex_math_single_backslash --output movielens.tex --lua-filter /Library/Frameworks/R.framework/Versions/4.1-arm64/Resources/library/rmarkdown/rmarkdown/lua/pagebreak.lua --lua-filter /Library/Frameworks/R.framework/Versions/4.1-arm64/Resources/library/rmarkdown/rmarkdown/lua/latex-div.lua --self-contained --highlight-style tango --pdf-engine pdflatex --variable graphics --variable 'geometry:margin=1in'
! Undefined control sequence.
l.347 ...by adding the computed (b_{i}) to (\mr
).

Error: LaTeX failed to compile movielens.tex. See The R package tinytex - Helper Functions to Manage TinyTeX, and Compile LaTeX Documents - Yihui Xie | 谢益辉 for debugging tips. See movielens.log for more info.
Execution halted

jrkrideau · February 12, 2022, 3:44pm

Hi Skynet, welcome to the forum.

We need a reproducible example (reprex)

FAQ: How to do a minimal reproducible example ( reprex ) for beginners Guides & FAQs

A minimal reproducible example consists of the following items: A minimal dataset, necessary to reproduce the issue The minimal runnable code necessary to reproduce the issue, which can be run on the given dataset, and including the necessary information on the used packages. Let's quickly go over each one of these with examples: Minimal Dataset (Sample Data) You need to provide a data frame that is small enough to be (reasonably) pasted on a post, but big enough to reproduce your issue. Let's say, as an example, that you are working with the iris data frame head(iris) #> Sepal.Length Sepal.Width Petal.Length Petal.Width Species #> 1 5.1 3.5 1.4 0.…

skynet451 · February 13, 2022, 4:26am

Hi,I am adding the Rmarkdown file location on my GitHub.
I am using macOS Monterey.

Please support

jrkrideau · February 13, 2022, 12:34pm

I am getting

Quitting from lines 42-58 (movielens.Rmd) 
Error in download.file("http://files.grouplens.org/datasets/movielens/ml-10m.zip",  : 
  download from 'http://files.grouplens.org/datasets/movielens/ml-10m.zip' failed

so I cannot duplicate your problem. Some sample data might help. A simple dput() might do.

It looks like you have a LaTeX problem rather than a strictly R /Rmarkdown problem but I do not know enough about how tinytex and R work to make a guess about where the problem is. At a wild guess, "geometry:margin=1in" looks like your normal weird LaTeX command that requires a latex package not necessarily included in tinytex.

Personally I have no use for tinytex and simply run a full installation of texlive . Trying that might help but it is a real pain to change LaTeX versions.

Sorry to be of so little help.

cderv · February 16, 2022, 1:23pm

I think this is because \mr is seen as a command and is not found. Hence the issue.

You need to fix this part of your document

skynet451 · February 17, 2022, 4:29pm

Hi still getting error.

cderv · February 17, 2022, 4:34pm

What is your code in Rmd now ?
Seems like there is still a similar issue but with another command than \mr

skynet451 · February 17, 2022, 4:57pm

hi,
I just replace the mr with mean_rating.

cderv · February 17, 2022, 5:02pm

Is \mean_rating a LaTeX math command ? I don't know it. Is it from a package ?

skynet451 · February 20, 2022, 1:52pm

hi, any support.
I am not able to find what is wrong.

skynet451 · February 22, 2022, 1:59pm

Hi,cderv

Please could you support and tell me what is I am doing wrong.
I am able to create *.html output.but while creating *.pdf I am getting the error.

cderv · March 4, 2022, 11:37am

I think I have already told you what is wrong. One of the LaTeX command you use is not found during LaTeX compilation. It does not exists among the loaded package. This is this line:

github.com

skynet451/movielens_data_science_capstone/blob/9490aed00a21a492c8bc9e619094d2e29e982dbc/movielens.Rmd#L162

      
        
              left_join(movie_avgs, by='movieId') %>%
              pull(b_i)
            model_s_rmse <- RMSE(predicted_ratings, validation$rating)
            rmse_results <- bind_rows(rmse_results,
                                      data_frame(method="Movie effect model",  
                                                 RMSE = model_s_rmse ))
            rmse_results %>% knitr::kable()
            ```
            
            

            
So we have predicted movie rating based on the fact that movies are rated differently by adding the computed $b_{i}$ to $\mr$.
            
            
We can see an improvement but this model does not consider the individual user rating effect.
            
            

            
### III. Regularized effect model
            
            
The use of the regularization permits to penalize the aspects of movies with very few ratings and in some users that only rated a very small number of movies. We should find the value of lambda (that is a tuning parameter) that will minimize the RMSE.
            
            

            
```{r lambdas, echo = TRUE}

by adding the computed $b_{i}$ to $\mr$.

This syntax means :

I am writing LaTeX Math
I am using the \mr LaTeX command.

What is \mr ? From which CTAN package it comes from ? Are you trying to use a LaTeX command here ? Or do you want to do something else ?

Anyway, I said to you before the issue is here, and you did not even answer my last question.

Please next time, take the time to correcty explain what you want to do so that you can get some useful help

system · March 22, 2022, 3:38pm

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