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Linux: Fedora 21 - R 3.2.1 - warning message in lesson 4 vectors - R Programming - Coursera #339

Open Jeeppler opened 9 years ago

Jeeppler commented 9 years ago

Hey,

I got this message during lesson 4 vectors in the R Programming package:

my_name <- c(my_char, "my_name")

| You are quite good my friend!

|==================================== | 76%

| Take a look at the contents of my_name.

warning messages from top-level task callback 'mini' Warning message: In stri_c(..., sep = sep, collapse = collapse, ignore_null = TRUE) : longer object length is not a multiple of shorter object length

system: Linux distro: Fedora 21 R-Version: R 3.2.1

Package: swirl Sub-selection: R Programming Lesson Number: 4 Lesson Name: Vectors

Do you need more information?

seankross commented 9 years ago

This error has been reported by a few users and I'm investigating it. Did this interfere with the progression of the lesson at all?

Jeeppler commented 9 years ago

@seankross no, it did not interfere with the progression and I did not loose any progress. It is just annoying.

My guess is an formatting error in the text, which leads to this error.

If I can further help you let me know.

seankross commented 9 years ago

Just curious but what is your reasoning for thinking it's a formatting error?

On Fri, Aug 28, 2015 at 3:57 PM, Jeppler notifications@github.com wrote:

@seankross no, it did not interfere with the progression and I did not loose any progress I have done. It is just annoying. My guess is an formatting error in the text, which leads to this error.

If I can further help you let me know.

Reply to this email directly or view it on GitHub: https://github.com/swirldev/swirl/issues/339#issuecomment-135873199

Jeeppler commented 9 years ago

It is just an intuitive guess not based on some "real" facts. The guess is based on the assumption that stri_c must be an string function implemented in C or C++. I guess C. C is not really safe in terms of strings, one wrong memory access can produce a wired behaviour.

This would be my assumption, but I am an R newbie, so don't take me too serious.

If you find out what it was let me know, I am curious too.