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Scatterplot with too many points
...gions appear darker that have more point plotted on them.
This is easy to do in ggplot2:
df <- data.frame(x = rnorm(5000),y=rnorm(5000))
ggplot(df,aes(x=x,y=y)) + geom_point(alpha = 0.3)
Another convenient way to deal with this is (and probably more appropriate for the number of points you ...
What's the difference between passing by reference vs. passing by value?
...lly defined as "pass by reference" has since fallen out of favor and is seldom used now.1
Newer languages2 tend to use a different (but similar) pair of techniques to achieve the same effects (see below) which is the primary source of confusion.
A secondary source of confusion is the fact that in ...
Garbage collector in Android
...
For versions prior to 3.0 honeycomb: Yes, do call System.gc().
I tried to create Bitmaps, but was always getting "VM out of memory error". But, when I called System.gc() first, it was OK.
When creating bitmaps, Android often fails with out of memory errors, and doe...
Renaming a branch in GitHub
...ly:
git push <remote> <local_branch>:<remote_branch>
So doing a push with no local_branch specified essentially means "take nothing from my local repository, and make it the remote branch". I've always thought this to be completely kludgy, but it's the way it's done.
As of Git 1....
Stashing only staged changes in git - is it possible?
...
Yes, It's possible with DOUBLE STASH
Stage all your files that you need to stash.
Run git stash --keep-index. This command will create a stash with ALL of your changes (staged and unstaged), but will leave the staged changes in your working direct...
RSS Feeds in ASP.NET MVC
...olution (video: starting around 41m) where he inherits from FileResult. By doing so, you can have your class's constructor call base("application/rss+xml") and avoid steps 3 and 4. He does override ExecuteResult, but it isn't vital. He also shortcuts a lot of typically-homespun code and uses the 3....
How to detect idle time in JavaScript elegantly?
...he page reload.
<script type="text/javascript">
var idleTime = 0;
$(document).ready(function () {
//Increment the idle time counter every minute.
var idleInterval = setInterval(timerIncrement, 60000); // 1 minute
//Zero the idle timer on mouse movement.
$(this).mousemove(func...
How to create a WPF UserControl with NAMED content
...
The answer is to not use a UserControl to do it.
Create a class that extends ContentControl
public class MyFunkyControl : ContentControl
{
public static readonly DependencyProperty HeadingProperty =
DependencyProperty.Register("Heading", typeof(string),...
How to split csv whose columns may contain ,
...tes = true;
parser.SetDelimiters(",");
string[] fields;
while (!parser.EndOfData)
{
fields = parser.ReadFields();
foreach (string field in fields)
{
Console.WriteLine(field);
}
}
parser.Close();
This should result in the following output:
2
1016
7/31/2008 14:22
Geoff ...
CSS transition shorthand with multiple properties?
...t syntax for the CSS transition shorthand with multiple properties. This doesn't do anything:
6 Answers
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