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Why does this loop produce “warning: iteration 3u invokes undefined behavior” and output more than 4
... of an expression, the result is not mathematically defined or not in the range of
representable values for its type, the behavior is undefined. [ Note: most existing implementations of C++
ignore integer overflows. Treatment of division by zero, forming a remainder using a zero divisor, and ...
Bin size in Matplotlib (Histogram)
... 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 data filled with integers only. As macrocosme points out, for floats you can use:
import nu...
Iterate keys in a C++ map
...boost::adaptors::map_keys){ do something } boost.org/doc/libs/1_50_0/libs/range/doc/html/range/reference/…
– rodrigob
Aug 29 '12 at 10:48
...
Int or Number DataType for DataAnnotation validation attribute
...
For any number validation you have to use different different range validation as per your requirements :
For Integer
[Range(0, int.MaxValue, ErrorMessage = "Please enter valid integer Number")]
for float
[Range(0, float.MaxValue, ErrorMessage = "Please enter valid float Number")]...
Regular expression for letters, numbers and - _
...the character class definition, otherwise it has a different meaning (i.e. range). The . also has a different meaning outside character class definitions, but inside, it's just a literal .
References
regular-expressions.info/Anchors, Character Classes and Repetition
In PHP
Here's a snippet t...
unsigned int vs. size_t
...might make assumption about it": I would hope the compiler knows the exact range of values that size_t can represent! If it doesn't, who does?
– Marc van Leeuwen
Jun 15 '14 at 5:42
...
How to implement classic sorting algorithms in modern C++?
... C++98, one needs to write these himself. There are substitutes from Boost.Range in boost::begin() / boost::end(), and from Boost.Utility in boost::next().
the std::is_sorted algorithm is only available for C++11 and beyond. For C++98, this can be implemented in terms of std::adjacent_find and a ha...
How to remove specific elements in a numpy array
...;>> a = np.array(list(itertools.compress(a, [i not in index for i in range(len(a))])))
>>> a
array([1, 2, 5, 6, 8, 9])
According to my tests, this outperforms numpy.delete(). I don't know why that would be the case, maybe due to the small size of the initial array?
python -m timeit...
How can I convert an RGB image into grayscale in Python?
... seconds
sk : 2.120 seconds
PIL and SciPy gave identical numpy arrays (ranging from 0 to 255). SkImage gives arrays from 0 to 1. In addition the colors are converted slightly different, see the example from the CUB-200 dataset.
SkImage:
PIL :
SciPy :
Original:
Diff :
Code
...
PHP: How to remove all non printable characters in a string?
...g_replace('/[\x00-\x1F\x7F-\xFF]/', '', $string);
It matches anything in range 0-31, 127-255 and removes it.
8 bit extended ASCII?
You fell into a Hot Tub Time Machine, and you're back in the eighties.
If you've got some form of 8 bit ASCII, then you might want to keep the chars in range 128-2...