大约有 44,300 项符合查询结果（耗时：0.0292秒） [XML]
How to install plugins to Sublime Text 2 editor?
...
182
You should have a Data/Packages folder in your Sublime Text 2 install directory.
All you need to...
Finding quaternion representing the rotation from one vector to another
...
Quaternion q;
vector a = crossproduct(v1, v2);
q.xyz = a;
q.w = sqrt((v1.Length ^ 2) * (v2.Length ^ 2)) + dotproduct(v1, v2);
Don't forget to normalize q.
Richard is right about there not being a unique rotation, but the above should give the "shortest arc," which ...
Pandas DataFrame column to list [duplicate]
...
270
You can use the Series.to_list method.
For example:
import pandas as pd
df = pd.DataFrame({...
How do I do multiple CASE WHEN conditions using SQL Server 2008?
... many WHEN as;
CASE WHEN Col1 = 1 OR Col3 = 1 THEN 1
WHEN Col1 = 2 THEN 2
...
ELSE 0 END as Qty
Or a Simple CASE expression
CASE Col1 WHEN 1 THEN 11 WHEN 2 THEN 21 ELSE 13 END
Or CASE within CASE as;
CASE WHEN Col1 < 2 THEN
CASE Col2 WHEN 'X' THE...
SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed
...
1
2
Next
138
...
How can I do DNS lookups in Python, including referring to /etc/hosts?
... |
edited Mar 7 '19 at 22:59
Justin M. Keyes
5,57011 gold badge2727 silver badges5656 bronze badges
a...
How to put spacing between TBODY elements
...
12 Answers
12
Active
...
Dynamically select data frame columns using $ and a character value
...s a reproducible example below:
# set seed for reproducibility
set.seed(123)
df <- data.frame( col1 = sample(5,10,repl=T) , col2 = sample(5,10,repl=T) , col3 = sample(5,10,repl=T) )
# We want to sort by 'col3' then by 'col1'
sort_list <- c("col3","col1")
# Use 'do.call' to call order. Se...
How to compare binary files to check if they are the same?
... diff will show if the files are the same or not:
[me@host ~]$ diff 1.bin 2.bin
Binary files 1.bin and 2.bin differ
If there is no output from the command, it means that the files have no differences.
share
|
...