大约有 13,600 项符合查询结果（耗时：0.0392秒） [XML]
How to clear variables in ipython?
...
JoopJoop
2,9062525 silver badges5050 bronze badges
add a comment
|
...
How can I know if a process is running?
...
answered Jul 6 '16 at 22:05
guneysusguneysus
5,06022 gold badges3232 silver badges3333 bronze badges
...
Is there an ExecutorService that uses the current thread?
... |
edited Jul 5 '11 at 14:05
answered Jul 5 '11 at 13:59
ov...
Reasons for using the set.seed function
...: In the academic world, if one claims that his algorithm achieves, say 98.05% performance in one simulation, others need to be able to reproduce it.
?set.seed
Going through the help file of this function, these are some interesting facts:
(1) set.seed() returns NULL, invisible
(2) "Init...
How to check the version before installing a package using apt-get?
...
answered Sep 19 '13 at 7:05
Yasiru GYasiru G
5,70955 gold badges1616 silver badges3636 bronze badges
...
Where do I find the bashrc file on Mac?
...'
– Michael Dimmitt
Feb 4 '17 at 16:05
...
JavaScript string newline character?
... |
edited Nov 3 '17 at 12:05
answered Jul 20 '09 at 22:46
m...
Sample random rows in dataframe
...83 0.4231117
8 -1.0356774 -0.1640883
9 -0.3983045 0.7157506
10 -0.9060305 2.3234110
Then select some rows at random:
> df[sample(nrow(df), 3), ]
X1 X2
9 -0.3983045 0.7157506
2 -1.1334614 -0.1973846
10 -0.9060305 2.3234110
...
Node.js check if file exists
... midomido
19.1k88 gold badges7979 silver badges105105 bronze badges
1
...
How to list the tables in a SQLite database file that was opened with ATTACH?
...|
edited Apr 16 '14 at 15:05
Tuan
2,85244 gold badges3232 silver badges5252 bronze badges
answered Sep 1...