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How can I create a correlation matrix in R?
...correlation. So, the number of rows must be the same between your matrix x and matrix y. Ex.:
set.seed(1)
x <- matrix(rnorm(20), nrow=5, ncol=4)
y <- matrix(rnorm(15), nrow=5, ncol=3)
COR <- cor(x,y)
COR
image(x=seq(dim(x)[2]), y=seq(dim(y)[2]), z=COR, xlab="x column", ylab="y column")
text...
Custom Drawable for ProgressBar/ProgressDialog
...tes.xml declares the colors of the different states:
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@android:id/background">
<shape>
<gradient
android:startColor="#000001"
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How do I use DateTime.TryParse with a Nullable?
...
As Jason says, you can create a variable of the right type and pass that. You might want to encapsulate it in your own method:
public static DateTime? TryParse(string text)
{
DateTime date;
if (DateTime.TryParse(text, out date))
{
return date;
}
else
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How to round an average to 2 decimal places in PostgreSQL?
...
-------
3.14
(1 row)
(In the above, note that float8 is just a shorthand alias for double precision. You can see that PostgreSQL is expanding it in the output).
You must cast the value to be rounded to numeric to use the two-argument form of round. Just append ::numeric for the shorthand cast...
Invoking a static method using reflection
...ect of type Class , but I am not able to create an instance of that class and also not able to invoke the static method main .
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Is there a [Go to file…]?
... keyboard shortcut to open a file by typing its name without putting your hand on the mouse. For example:
7 Answers
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Convert a JSON String to a HashMap
I'm using Java, and I have a String which is JSON:
18 Answers
18
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How to jump to top of browser page
I'm writing a modal popup and I need the browser to jump to the top of the screen when the open modal button is pressed. Is there a way to scroll the browser to the top using jQuery?
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How do I pass the value (not the reference) of a JS variable to a function? [duplicate]
...ange_selection(i);
});
})(i);
}
By creating an anonymous function and calling it with the variable as the first argument, you're passing-by-value to the function and creating a closure.
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How to use System.Net.HttpClient to post a complex type?
...ct that contains the correct properties, serializing it using this method, and passing it that way, but I get a 500 Internal Server Error. It never hits the web api controller method.
– indot_brad
Apr 24 '12 at 20:14
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