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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...
Checkout one file from Subversion
.../) repository, and it looks the newest websvn interfaces doesn't provide a raw file download (or we have it mis-configured or I am blind). Easier to do this way than checkout+up just for downloading a file.
– ribamar
Nov 27 '15 at 11:10
...
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 do you reverse a string in place in C or C++?
...
Tested on my iphone this is slower than using raw pointer addresses by about 15%
– jjxtra
Apr 29 '13 at 20:16
3
...
Why is Everyone Choosing JSON Over XML for jQuery? [closed]
...1.. really.. so many different datatypes support matters a lot compared to raw xml text
– Xinus
Nov 16 '09 at 17:26
48
...
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;
...