I would like to place two plots side by side using the ggplot2 package, i.e. do the equivalent of par(mfrow=c(
In the R scripting language, how do I write lines of text, e.g. the following two lines Hello World to a fi
How can I concatenate (merge, combine) two values? For example I have: tmp = cbind("GAD", "AB") tmp # [,
A friend sent me along this great tutorial on webscraping NYtimes with R. I would really love to try it. Howev
I want to write trycatch code to deal with error in downloading from the web. url <- c( "http://stat.e
I am in a process of figuring out how to use my university cluster. It has 2 versions of R installed. System w
I tried to install a package, using install.packages("foobarbaz") but received the warning Warning message
I want to look at the source code for a function to see how it works. I know I can print a function by typing
I have a data frame and some columns have NA values. How do I replace these NA values with zeroes?
The terminology used to merge a branch with an official repository is a 'pull request'. This is conf
So I first forked a repo and then made a commit to that forked repo. I then opened a pull request. The pull re
I guess most of you, developers, use any VCS, and I hope some of you use Git. Do you have any tip or trick how
I have been using Github for a little while and I have been fine with git add, git commit, and git push so far
I have many Git branches. How do I delete branches which have already been merged? Is there an easy way to del
What is the (default) charset for: MySQL database MySQL table MySQL column
Is there an SQL injection possibility even when using mysql_real_escape_string() function? Consider this samp
I have 2-3 different column names that I want to look up in the entire database and list out all tables which
Between utf8_general_ci and utf8_unicode_ci, are there any differences in terms of performance?
What is the best way to open a file as read/write if it exists, or if it does not, then create it and open it
I know that in Linux, to redirect output from the screen to a file, I can either use the > or tee. How