大约有 43,200 项符合查询结果（耗时：0.0488秒） [XML]
For each row in an R dataframe
...
105
You can try this, using apply() function
> d
name plate value1 value2
1 A P1 ...
What is “android.R.layout.simple_list_item_1”?
...
|
edited Jul 3 '13 at 3:21
Aaron Klap
24322 silver badges99 bronze badges
answered Sep 8 '10 a...
What does %~d0 mean in a Windows batch file?
...arguments used to invoke the file: %0 is the path to the bat-file itself, %1 is the first argument after, %2 is the second and so on.
Since the arguments are often file paths, there is some additional syntax to extract parts of the path. ~d is drive, ~p is the path (without drive), ~n is the file n...
C Macro definition to determine big endian or little endian machine?
...
19 Answers
19
Active
...
How to delete from select in MySQL?
...
210
SELECT (sub)queries return result sets. So you need to use IN, not = in your WHERE clause.
Add...
Split comma-separated strings in a column into separate rows
...
81
This old question frequently is being used as dupe target (tagged with r-faq). As of today, it h...
How to get first element in a list of tuples?
...
12 Answers
12
Active
...
Is there an expression for an infinite generator?
...
134
for x in iter(int, 1): pass
Two-argument iter = zero-argument callable + sentinel value
int...
FAT32系统中长文件名的存储 - C/C++ - 清泛网 - 专注C/C++及内核技术
...统会自动加上对应的短文件名，其一般有的原则：
(1)、取长文件名的前6个字符加上"~1"形成短文件名，扩展名不变。
(2)、如果已存在这个文件名，则符号"~"后的数字递增，直到5。
(3)、如果文件名中"~"后面的数字达到...
Only read selected columns
...
157
Say the data are in file data.txt, you can use the colClasses argument of read.table() to skip...