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binning data in python with scipy/numpy
...mpy.digitize(data, bins)
bin_means = [data[digitized == i].mean() for i in range(1, len(bins))]
An alternative to this is to use numpy.histogram():
bin_means = (numpy.histogram(data, bins, weights=data)[0] /
numpy.histogram(data, bins)[0])
Try for yourself which one is faster... :)...
Signed to unsigned conversion in C - is it always safe?
...um value that can be represented in the new type until the value is in the range of the new type.
Otherwise, the new type is signed and the value cannot be represented in it; either the result is implementation-defined or an implementation-defined signal is raised.
Now we need to refer to (2)...
How to get the number of Characters in a String?
...s len([]rune(string)) pattern automatically, and replaces it with for r := range s call.
Adds a new runtime function to count runes in a string.
Modifies the compiler to detect the pattern len([]rune(string))
and replaces it with the new rune counting runtime function.
RuneCount/lenruneslice/ASCII...
return query based on date
...
You probably want to make a range query, for example, all items created after a given date:
db.gpsdatas.find({"createdAt" : { $gte : new ISODate("2012-01-12T20:15:31Z") }});
I'm using $gte (greater than or equals), because this is often used for date...
How to write loop in a Makefile?
... do \
echo $$number ; \
done
produces:
1
2
3
4
For bigger ranges, use:
target:
number=1 ; while [[ $$number -le 10 ]] ; do \
echo $$number ; \
((number = number + 1)) ; \
done
This outputs 1 through 10 inclusive, just change the while terminating condition...
How to fix the aspect ratio in ggplot?
...ive the full picture, as the example provides perhaps unnatural data where range of x equals the range of y. If however the data were:
df <- data.frame(
x = runif(100, 0, 50),
y = runif(100, 0, 5))
ggplot(df, aes(x=x, y=y)) + geom_point() + coord_fixed()
then the plot would look like this:...
Check for column name in a SqlDataReader object
...tOrdinal("columnName") on your DataReader up front, and catch an IndexOutOfRangeException in case the column isn't present.
In fact, let's make an extension method:
public static bool HasColumn(this IDataRecord r, string columnName)
{
try
{
return r.GetOrdinal(columnName) >= 0;
...
How to format numbers? [duplicate]
...bs/jquery/2.1.1/jquery.min.js"></script>
<input id="dp" type="range" min="0" max="5" step="1" value="2" title="number of decimal places?" />
Now the other version, without rounding.
This takes a different route and attempts to avoid mathematical calculation (as this can intro...
How to find all positions of the maximum value in a list?
..., 31, 55, 21, 40, 18, 50,
35, 41, 49, 37, 19, 40, 41, 31]
b = range(10000)
c = range(10000 - 1, -1, -1)
d = b + c
def maxelements_s(seq): # @SilentGhost
''' Return list of position(s) of largest element '''
m = max(seq)
return [i for i, j in enumerate(seq) if j == m]
def m...
Difference between fmt.Println() and println() in Go
...
I can see difference here:
rangeOverIntsAndStrings(1, 5)
func rangeOverIntsAndStrings(args ...interface{}) {
for _, v := range args {
println(v)
}
}
// output
(0x108f060,0x10c5358)
(0x108f060,0x10c5360)
vs
func rangeOverIntsAndS...