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R语言-amis 数据 (中文帮助)
2017-09-05 21:23:52

amis {boot}

[转载请注明出处,胡桃木屋 mathapply.cn ”R语言中文帮助“工作室杨玲艳译]


Car Speeding and Warning Signs
车辆的速度和警告标志


Description(描述)

The amis data frame has 8437 rows and 4 columns.
该数据框具有8437行和4列。

In a study into the effect that warning signs have on speeding patterns, Cambridgeshire County Council considered 14 pairs of locations.
在一项关于警告标志对速度模式的影响的研究中,剑桥郡议会考虑了14对地点。
The locations were paired to account for factors such as traffic volume and type of road.
这14对地点的很多影响因素被考虑,例如交通量和道路类型。
 One site in each pair had a sign erected warning of the dangers of speeding and asking drivers to slow down.
在每一对地点中的其中一个地点上竖立关于超速驾驶的危险的警告并且要求驾驶员减速行驶。
 No action was taken at the second site.
在另外一个地点上不竖立警告。
Three sets of measurements were taken at each site.
在每个地点都取三组测量值。
 Each set of measurements was nominally of the speeds of 100 cars but not all sites have exactly 100 measurements.
每一组测量值名义上是100辆汽车的速度,但是实际上并不是每一个地点都能确切地取到100辆汽车的测量值。
 These speed measurements were taken before the erection of the sign,
在竖立警告标志之前,读取一组这些速度测量值,
 shortly after the erection of the sign,
在竖立警告标志不久后再读取一组测量值
 and again after the sign had been in place for some time.
之后,再在竖立标志一段时间后再次读取测量值


Usage(用法)

amis


Format(格式)

This data frame contains the following columns:
该数据框包含以下列:
speed(速度)
    Speeds of cars (in miles per hour).
    车辆的速度(英里/小时)。
period(时段)
    A numeric column indicating the time that the reading was taken.
    一个数字列,指示读取的时间。
    A value of 1 indicates a reading taken before the sign was erected,
    数值1值指的是在竖立标志之前读取的测量值,
   a 2 indicates a reading taken shortly after erection of the sign and a 3 indicates a reading taken after the sign had been in place for some time. 
    数值2指的是在竖立警告标志不久后读取的测量值,数值3指的是在竖立警告标志一段时间后读取的测量值。
warning(警告)
    A numeric column indicating whether the location of the reading was chosen to have a warning sign erected.
    一个数字列,指示被选取来读取测量值的地点是否竖立警告标志。
     A value of 1 indicates presence of a sign and a value of 2 indicates that no sign was erected.
     数值1表示竖立警告标志,数值2表示没有竖立警告标志。
pair(一对)

    A numeric column giving the pair number at which the reading was taken. Pairs were numbered from 1 to 14.
   一个数字列,指示被选取来读取测量值的地点的编号,地点的编号从1到14对。


Source(来源)

The data were kindly made available by Mr. Graham Amis, Cambridgeshire County Council, U.K.
数据来源于英国剑桥郡议会的Graham Amis先生。


References(参考文献)

Davison, A.C. and Hinkley, D.V. (1997) Bootstrap Methods and Their Application. Cambridge University Press.

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