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Selecting a row of pandas series/dataframe by integer index
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echoing @HYRY, see the new docs in 0.11
http://pandas.pydata.org/pandas-docs/stable/indexing.html
Here we have new operators, .iloc to explicity support only integer indexing, and .loc to explicity support only label indexing
e.g. imagine this scenario
In ...
Bin size in Matplotlib (Histogram)
... boundaries. They can be unequally distributed, too:
plt.hist(data, bins=[0, 10, 20, 30, 40, 50, 100])
If you just want them equally distributed, you can simply use range:
plt.hist(data, bins=range(min(data), max(data) + binwidth, binwidth))
Added to original answer
The above line works for...
Standardize data columns in R
...have a dataset called spam which contains 58 columns and approximately 3500 rows of data related to spam messages.
15 An...
Removing trailing newline character from fgets() input
... ugly way:
char *pos;
if ((pos=strchr(Name, '\n')) != NULL)
*pos = '\0';
else
/* input too long for buffer, flag error */
The slightly strange way:
strtok(Name, "\n");
Note that the strtok function doesn't work as expected if the user enters an empty string (i.e. presses only Enter). ...
Add single element to array in numpy
...mal to use the proper method for adding an element:
a = numpy.append(a, a[0])
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Round to at most 2 decimal places (only if necessary)
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Use Math.round(num * 100) / 100
Edit: to ensure things like 1.005 round correctly, we use
Math.round((num + Number.EPSILON) * 100) / 100
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Operation on every pair of element in a list
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edited Jun 3 '09 at 18:12
answered Jun 3 '09 at 0:24
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Iterate a list with indexes in Python
...e this [3, 7, 19] and makes it into iterable list of tuples, like so: [(0,3), (1,7), (2,19)] to use it instead of:
6 An...
Get a random boolean in python?
...ter
$ python -m timeit -s "import random" "random.choice([True, False])"
1000000 loops, best of 3: 0.904 usec per loop
$ python -m timeit -s "import random" "random.choice((True, False))"
1000000 loops, best of 3: 0.846 usec per loop
$ python -m timeit -s "import random" "random.getrandbits(1)"
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show all tags in git log
... namespace) is purely local matter; what one repository has in 'refs/tags/v0.1.3', other can have in 'refs/tags/sub/v0.1.3' for example.
So when you create signed tag 'A', you have the following situation (assuming that it points at some commit)
35805ce <--- 5b7b4ead <=== refs/t...