大约有 44,100 项符合查询结果（耗时：0.0541秒） [XML]
Calculating Pearson correlation and significance in Python
...
201
You can have a look at scipy.stats:
from pydoc import help
from scipy.stats.stats import pear...
Python strftime - date without leading 0?
... |
edited Apr 8 '17 at 7:42
C S
8061212 silver badges1919 bronze badges
answered Jan 15 '10 at 16:38
...
Ternary operator is twice as slow as an if-else block?
...duced by the X86 and X64 JITs for each of these cases.
X86, if/then
32: foreach (int i in array)
0000007c 33 D2 xor edx,edx
0000007e 83 7E 04 00 cmp dword ptr [esi+4],0
00000082 7E 1C jle 000000A0
00000084 8B 44 ...
How to count the number of true elements in a NumPy bool array
...
265
You have multiple options. Two options are the following.
numpy.sum(boolarr)
numpy.count_nonz...
How do I draw a shadow under a UIView?
...hat I should use CGContextSetShadow() to draw the shadow, but the Quartz 2D programming guide is a little vague:
16 Answe...
Redirecting Output from within Batch file
...r to End-Of-File multiple times.
@echo off
command1 >output.txt
command2 >>output.txt
...
commandN >>output.txt
A better way - easier to write, and faster because the file is opened and positioned only once.
@echo off
>output.txt (
command1
command2
...
commandN
)
Ano...
Oracle Differences between NVL and Coalesce
...
COALESCE is more modern function that is a part of ANSI-92 standard.
NVL is Oracle specific, it was introduced in 80's before there were any standards.
In case of two values, they are synonyms.
However, they are implemented differently.
NVL always evaluates both arguments, whil...
How do I get bit-by-bit data from an integer value in C?
... |
edited Jan 9 '16 at 4:21
Ashish Ahuja
4,70099 gold badges4343 silver badges6161 bronze badges
answer...
How to add texture to fill colors in ggplot2
...s greys when using a black and white printer. I searched the online ggplot2 documentation but didn't see anything about adding textures to fill colors. Is there an official ggplot2 way to do this or does anyone have a hack that they use? By textures I mean things like diagonal bars, reverse diag...