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Subset of rows containing NA (missing) values in a chosen column of a data frame
...NULL" strings as is).
If using read.table() or read.csv(), you should consider the "na.strings" argument to do clean data import, and always work with real R NA values.
An example, working in both cases "NULL" and "NA" cells :
DF <- read.csv("file.csv", na.strings=c("NA", "NULL"))
new_DF <-...
Remove 'a' from legend when using aesthetics and geom_text
...in geom_text:
ggplot(data = iris,
aes(x = Sepal.Length, y = Sepal.Width, colour = Species, shape = Species, label = Species)) +
geom_point() +
geom_text(show.legend = FALSE)
The argument show_guide changed name to show.legend in ggplot2 2.0.0 (see release news).
Pre-ggplot2 2.0...
System.Threading.Timer in C# it seems to be not working. It runs very fast every 3 second
...nge the timer once the work has completed, not before. Example:
private void Callback( Object state )
{
// Long running operation
_timer.Change( TIME_INTERVAL_IN_MILLISECONDS, Timeout.Infinite );
}
Thus there is no need for locking mechanisms because there is no concurrency. The timer will...
what's the difference between “hadoop fs” shell commands and “hdfs dfs” shell commands?
...gument to hadoop fs commands (e.g. hdoop fs -ls file:///). If nothing is said, it defaults to hdfs schema, AFAIK (hdoop fs -ls / == hadoop fs -ls hdfs:///).
– frb
Mar 9 '15 at 12:04
...
Difference between 'python setup.py install' and 'pip install'
...have to manually delete and maintain a package by hand if you want to get rid of it, which could be potentially error-prone.
You no longer have to manually download your files. If you use setup.py, you have to visit the library's website, figure out where to download it, extract the file, run setup....
What's the difference between “Write-Host”, “Write-Output”, or “[console]::WriteLine”?
...ost ("count=" + $count)
# or
write-host "count=$count"
BTW - Watch this video of Jeffrey Snover explaining how the pipeline works. Back when I started learning PowerShell I found this to be the most useful explanation of how the pipeline works.
...
How to click first link in list of items after upgrading to Capybara 2.0?
...").click
Capybara finds several .item's so it raises an exception. I consider this behavior of Capybara 2 very good.
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In git, what is the difference between merge --squash and rebase?
...tly
dropped. This could have been surprising to a user who tried to override
the no-commit behavior of squash using --commit explicitly.
git/git builtin/merge.c#cmd_merge() now includes:
if (option_commit > 0)
die(_("You cannot combine --squash with --commit."));
git rebase --inte...
Check if my app has a new version on AppStore
... infoDictionary = [[NSBundle mainBundle] infoDictionary];
NSString* appID = infoDictionary[@"CFBundleIdentifier"];
NSURL* url = [NSURL URLWithString:[NSString stringWithFormat:@"http://itunes.apple.com/lookup?bundleId=%@", appID]];
NSData* data = [NSData dataWithContentsOfURL:url];
N...
Rename specific column(s) in pandas
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
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