wqData(wq)
wqData()所属R语言包：wq
Construct an object of class "WqData"
构造对象类WqData“
译者：生物统计家园网 机器人LoveR
描述----------Description----------
wqData is a constructor for the "WqData" class that is often more convenient to use than new. It converts a data.frame containing water quality data in “long” or “wide” format to a "WqData" object. In “long” format, observations are all in one column and a second column is used to designate the variable being observed. In “wide” format, observations for each variable are in a separate column.
wqData是的构造函数"WqData"类，往往是更方便的使用比new。它把一个数据框，在“长”和“宽”的格式到"WqData"对象的水质数据。在“长”格式，观测所有在一列和第二列是用来指定所观察到的变量。在“宽”的格式，为每个变量的观测是在一个单独的列。
用法----------Usage----------
wqData(data, locus, wqdata, site.order, time.format = "%Y-%m-%d",
type = c("long", "wide"))
参数----------Arguments----------
参数：data
Data frame containing water quality data.
数据框包含的水质数据。
参数：locus
Character or numeric vector designating column names or numbers, respectively, in data that correspond to time, site and depth.
字符或数字矢量指定列的名称或编号，分别在data对应的time，site和depth。
参数：wqdata
In the case of “long” data, character or numeric vector designating column names or numbers, respectively, in data that correspond to variable and value. In the case of “wide” data, character or numeric vector designating column names or numbers, respectively, in data that denote water quality variable data.
的情况下，“长”的数据，字符或数字矢量指定列的名称或编号，分别在data，variable和value。在的情况下，“宽”的数据，字符或数字矢量指定列的名称或编号，分别在data，表示水质的可变数据。
参数：site.order
If TRUE, site factor levels will be ordered in alphanumeric order.
如果TRUE，site因子水平将字母数字顺序排序。
参数：time.format
Conversion specification for time defined by <acronym>ISO C/POSIX</acronym> standard (see strptime).
转换规范time定义的<acronym> ISO C/POSIX </首字母缩写标准（见strptime）。
参数：type
Either “long” or “wide” data.
无论是“长”或“宽”data。
Details
详细信息----------Details----------
If the data are already in long format, the function has little to do but rename the data fields. If in wide format, the reshape2 package is called to melt the data. The function also removes NA observations, converts site to (possibly ordered) factors with valid variable names, and converts time to class "Date" or "POSIXct" and ISO 8601 format, depending on time.format.
如果数据已经在长格式，该函数有小做，但重命名数据字段。如果在宽屏幕格式，reshape2包被称为melt的数据。的功能也将删除NA的意见，将site（可能是有序的）因素，有效的变量名，并将其转换time类"Date"或"POSIXct"和ISO 8601格式，根据time.format。
值----------Value----------
An object of class "WqData".
对象的类"WqData"。
参考文献----------References----------
参见----------See Also----------
as.Date, strptime, WqData-class
as.Date，strptime，WqData-class
实例----------Examples----------
# Create new WqData object from sfbay data. First combine date and time[创建新WqData对象sfbay数据。首先，结合日期和时间]
# into a single string after making sure that all times have 4 digits.[成单个字符串后，确保所有的时间有4位。]
sfb <- transform(sfbay, time = substring(10000 + time, 2, 5))
sfb <- transform(sfb, time = paste(date, time, sep = ' '))
sfb <- wqData(sfb, 2:4, 5:12, site.order = TRUE, type = "wide",
time.format = "%m/%d/%Y %H%M")
head(sfb)
# If time of day were not required, then the following would suffice:[如果没有需要一天的时间，那么下面就足够了：]
sfb <- wqData(sfbay, c(1,3,4), 5:12, site.order = TRUE, type = "wide",
time.format = "%m/%d/%Y")
head(sfb)
summary(sfb)
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注：
注1：为了方便大家学习，本文档为生物统计家园网机器人LoveR翻译而成，仅供个人R语言学习参考使用，生物统计家园保留版权。
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发表于 2012-10-1 23:09:42
