获得平均值? [英] Get the average value ?
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问题描述
您好,
我需要编写一个函数来计算来自数据库的coupe
参数的平均值。
问题1
(价值)(回答具体价值的人)
[1] 5
[2] 21
[3] 67
[4] 233
[5] 348
任何想法都会非常受欢迎。
谢谢
Jess
Hello,
I need to write a function to calculate the average value from a coupe
of parameters from database.
Question 1
(value) (people that answer the specific value)
[1] 5
[2] 21
[3] 67
[4] 233
[5] 348
Any ideas would be very welcome.
Thanks
Jess
推荐答案
如果你想给老师留下深刻印象,你应该使用递归的
函数。好吧,只需使用for(每个)功能。
祝你好运。
Jeroen
je ************ @ yahoo.se schreef:
If you want to impress your teacher, you should use a recursive
function. Else just use a for(each) function.
Good luck.
Jeroen
je************@yahoo.se schreef:
你好,
我需要编写一个函数来计算来自数据库的coupe
参数的平均值。 />
问题1
(价值)(回答具体价值的人)
[1] 5 >
[2] 21
[3] 67
[4] 233
[5] 348
任何想法都会非常受欢迎。
谢谢
Jess
Hello,
I need to write a function to calculate the average value from a coupe
of parameters from database.
Question 1
(value) (people that answer the specific value)
[1] 5
[2] 21
[3] 67
[4] 233
[5] 348
Any ideas would be very welcome.
Thanks
Jess
好吧,如果数据在数据库中,那么最好的选择是在* * / $
数据库中执行此操作,使用带有GROUP BY和AVG()的SQL;然而,这就变成了错误的小组; -p
Marc
Well, if the data is in a database, then the best option is to do this *at*
the database, using SQL with GROUP BY and AVG(); however, this then becomes
the wrong group ;-p
Marc
查找SQL命令AVG
http://www.w3schools.com/sql /func_avg.asp
-
问候
John Timney(MVP)
访问我的网站:
http://www.johntimney.com
http://www.johntimney.com/blog
< je ************ @ yahoo.sewrote in message
news:11 ************** ********@i42g2000cwa.googlegr oups.com ...
look up the SQL command AVG
http://www.w3schools.com/sql/func_avg.asp
--
Regards
John Timney (MVP)
VISIT MY WEBSITE:
http://www.johntimney.com
http://www.johntimney.com/blog
<je************@yahoo.sewrote in message
news:11**********************@i42g2000cwa.googlegr oups.com...
您好,
我需要写一个函数来计算一个coupe的平均值
来自数据库的参数。
问题1
(值)(回答特定val的人ue)
[1] 5
[2] 21
[3] 67
[4] 233
[5] 348
任何想法都会非常受欢迎。
谢谢
Jess
Hello,
I need to write a function to calculate the average value from a coupe
of parameters from database.
Question 1
(value) (people that answer the specific value)
[1] 5
[2] 21
[3] 67
[4] 233
[5] 348
Any ideas would be very welcome.
Thanks
Jess
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