leodido / hrr

Horizontal rule for the R language

hrr

Horizontal rule for R language.

Why?

Because the horizontal rules are the easiest way to split your output into blocks.

Inspired by hr for bash.

Installation

You can install hrr via CRAN.

E.g.,

install.packages('hrr', repos='http://cran.r-project.org')

Otherwise, if you prefer, you can install it via devtools package (link).

library(devtools)
install_github('hrr', username = 'leodido')

How to use it?

Load it.

library(hrr)

Simply call the hr() function.

It will print the the default symbol (i.e., #) till the end of your terminal window.

hr()
#################################### ...

Or define your own symbol.

hr('*')
************************************ ...

You can also make beautiful ASCII patterns.

hr('-', '#', '-')
------------------------------------
####################################
------------------------------------

hr('-#-', '-', '-#-')
-#--#--#--#--#--#--#--#--#--#--#--#-
------------------------------------
-#--#--#--#--#--#--#--#--#--#--#--#-

From the command-line:

TODO

Requirements

The only requirement is the R language (tested in version 3.0.*).

License

This package is released under the terms of the MIT license.

hrr's Issues

Fix detected terminal width (i.e., columns)

When hr() function is called within a script (e.g, via Rscript) it fails to detected the terminal width because Sys.getenv('COLUMNS') returns an empty string.

Build binary package

Improve number of columns when R is used into an IDE

E.g.:

• RStudio (darwin, windows, linux)
• R.app (darwin)

Create a standalone executable

Once done send a pull request to original ideator (link).

Bug with empty string parameter

Error:

Errore in rep_len(symbol, repeat_count) : valore 'length.out' non valido
Inoltre: Warning message:
In FUN(X[[1L]], ...) : si è prodotto un NA per coercizione

Reproduce:

library(hrr)
hr('')

Fix detected terminal width (i.e., columns)

Log:

stty: stdin isn't a terminal
Warning: running command 'stty -a' had status 1
Error in rep_len(symbol, repeat_count) : invalid 'length.out' value
Calls: hr -> sapply -> lapply -> FUN -> paste -> rep_len

Post to CRAN

Continuous Integration

• Unit tests
• Code coverage
• Build checks
• TravisCI
• AppVeyor

Fix detected terminal width (i.e., columns)

Build binary package