大约有 44,000 项符合查询结果（耗时：0.0351秒） [XML]
Why does changing 0.1f to 0 slow down performance by 10x?
...
1627
Welcome to the world of denormalized floating-point! They can wreak havoc on performance!!!
...
How do you detect where two line segments intersect? [closed]
...first line segment (p + t r):
t0 = (q − p) · r / (r · r)
t1 = (q + s − p) · r / (r · r) = t0 + s · r / (r · r)
If the interval between t0 and t1 intersects the interval [0, 1] then the line segments are collinear and overlapping; otherwise they are collinear and disj...
Maven in Eclipse: step by step installation [closed]
...
13 Answers
13
Active
...
How to increase font size in a plot in R?
...
145
You want something like the cex=1.5 argument to scale fonts 150 percent. But do see help(par) ...
What is the most pythonic way to check if an object is a number?
...
14 Answers
14
Active
...
How to pretty-print a numpy.array without scientific notation and with given precision?
...
14 Answers
14
Active
...
IntelliJ IDEA 13 uses Java 1.5 despite setting to 1.7
Despite specifying JDK 1.7 in all project settings (including in File -> Project Structure -> Project :: Project SDK ), the following error is produced by IntelliJ 13 when trying to compile some simple Java 7 code which does use the diamond operator:
...
Normalize data in pandas
...In [92]: df
Out[92]:
a b c d
A -0.488816 0.863769 4.325608 -4.721202
B -11.937097 2.993993 -12.916784 -1.086236
C -5.569493 4.672679 -2.168464 -9.315900
D 8.892368 0.932785 4.535396 0.598124
In [93]: df_norm = (df - df.mean()) / (df.max() - df.min()...