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How to calculate cumulative normal distribution?
...ve distribution function for the standard normal distribution'
return (1.0 + erf(x / sqrt(2.0))) / 2.0
Ref:
https://docs.python.org/2/library/math.html
https://docs.python.org/3/library/math.html
How are the Error Function and Standard Normal distribution function related?
...
In Java, what does NaN mean?
..._div_zero = 0.0f / 0.0f;
float sqrt_negative = (float)Math.sqrt(-1.0);
float log_negative = (float)Math.log(-1.0);
float inf_minus_inf = Float.POSITIVE_INFINITY - Float.POSITIVE_INFINITY;
float inf_times_zero = Float.POSITIVE_INFINITY * 0.0f;
float quiet_...
Difference between '..' (double-dot) and '…' (triple-dot) in range generation?
...are integers and you enumerate the ranges into arrays. Consider the range (1.0...3.5) - what is the value just before 3.5? Certainly not 2.5!
– Chris Heald
Jul 27 '15 at 23:32
...
How to parse an RSS feed using JavaScript?
...ument.location.protocol + '//ajax.googleapis.com/ajax/services/feed/load?v=1.0&num=10&callback=?&q=' + encodeURIComponent(FEED_URL),
dataType : 'json',
success : function (data) {
if (data.responseData.feed && data.responseData.feed.entries) {
$.each(data.responseD...
XML Schema minOccurs / maxOccurs default values
...
example:
XML
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="country.xsl"?>
<country xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="country.xsd">
<countryName>...
Why does Decimal.Divide(int, int) work, but not (int / int)?
...nd multiply by 100 to find percentage.
double p = (double)((PeopleCount * 1.0 / AllPeopleCount * 1.0) * 100.0);
%: 48,3478260869565 --> 278 / 575 ---> 0
%: 51,6521739130435 --> 297 / 575 ---> 0
if I multiply the PeopleCount by 1.0 it makes it decimal and division will be 48.34...
als...
String Resource new line /n not possible?
...
use a blackslash not a forwardslash. \n
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="title">Hello\nWorld!</string>
</resources>
Also, if you plan on using the string as HTML, you can use &lt;br /&gt; for a line break(<...
Difference between == and ===
...return lhs.x == rhs.x && lhs.y == rhs.y
}
let point1 = CGPoint(x: 1.0, y: 1.0)
let point2 = CGPoint(x: 1.0, y: 1.0)
point1 <==> point2 // true
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...
Matplotlib discrete colorbar
...ap.N)]
# force the first color entry to be grey
cmaplist[0] = (.5, .5, .5, 1.0)
# create the new map
cmap = mpl.colors.LinearSegmentedColormap.from_list(
'Custom cmap', cmaplist, cmap.N)
# define the bins and normalize
bounds = np.linspace(0, 20, 21)
norm = mpl.colors.BoundaryNorm(bounds, cmap...
How to customize a Spinner in Android
...folder make background.xml for a border of the spinner.
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="@android:color/transparent" />
<corners android:radius="5dp" />
<stroke
android:width="1...