C_TargetDiagram(solaR)
C_TargetDiagram()所属R语言包：solaR
Statistical analysis of a PV system with the Target Diagram
光伏发电系统的统计分析与目标图
译者：生物统计家园网 机器人LoveR
描述----------Description----------
In a PV plant, the individual systems are theoretically identical and their performance along the time should be the same. Due to their practical differences –power tolerance, dispersion losses, dust–, the individual performance of each system will deviate from the average behaviour. However, when a system is performing correctly, these deviations are constrained inside a range and should not be regarded as sign of malfunctioning.
在光伏电厂中，单个系统在理论上是相同的，并且它们的性能沿时间应该是相同的。由于自己的实际差异功率偏差，分散损失，防尘，每个系统的个人表现偏离的平均行为。然而，当系统被正确地执行，这些偏差的范围内的限制，并且不应该被视为发生了故障的迹象。
If these common deviations are assumed as a random process, a statistical analysis of the performance of the whole set of systems can identify a faulty system as the one that departs significantly from the mean behaviour.
如果这些常见的偏差被假定为一个随机过程，整套系统的性能的统计分析可以识别有故障的系统作为一个出发，从平均的行为显着。
These functions compare the daily performance of each system with a reference (for example, the median of the whole set) during a time period of N days preceding the current day. They calculate a set of statistics of the performance of the PV plant as a whole, and another set of the comparison with the reference. This statistical analysis can be summarised with a graphical tool named "Target Diagram", which plots together the root mean square difference, the average difference and the standard deviation of the difference. Besides, this diagram includes the sign of the difference of the standard deviations of the system and the reference.
这些函数比较每个系统的日常表现N天前的当前天的时间段期间（例如，整个组的中位数）与一参考。根据他们的计算的性能的光伏电站作为一个整体，而另一组的基准的比较，与一组的统计资料。这种统计分析可以概括名为“目标图”，其中图一起的根均方差异，差异的平均和标准偏差的差别与一个图形工具。此外，该图还包括系统的标准偏差的和参考的差的符号。
用法----------Usage----------
analyzeData(x, ref=NULL)
TargetDiagram(x, end, ndays, ref=NULL, color=NULL, cex=0.8,...)
参数----------Arguments----------
参数：x
A zoo object with several columns. This object represent the time evolution of a set of units (e.g. PV generators of a large system) which are supposed to show a similar behaviour.
Azoo对象数列。此对象表示，这是为了示出类似的行为一组的单位（例如一个大型系统的光伏发电机）的时间演变。
参数：ref
A zoo object to be used as the reference unit. If ref=NULL (default), the reference is the median of the set.
Azoo对象要使用作为基准单元。如果ref=NULL（默认），参考中位数的设置。
参数：end
A Date or POSIXct object (same class as the index of x). It defines the last day of the window to be included in the analysis.
ADate或POSIXct对象（同一类的索引x）。它定义了要包含在分析中的窗口的最后一天。
参数：ndays
A numeric vector, where each element is the number of days to be included in each analysis.
数值向量，其中每个元素是被包括在每一个分析的天数。
参数：color
If color=NULL (default) the plot is black and white and each analysis is contained in different areas.
如果color=NULL（默认），plot是黑色和白色，每一个分析包含在不同的领域。
参数：cex
Size of the labels.
标签的大小。
参数：...
Arguments to be read by xyplot.
的参数读取xyplot。
值----------Value----------
The result of TargetDiagram is a list with two components:
TargetDiagram是list两部分组成：
plot: a trellis object with the plot.
简介：trellis对象的图。
stat: a zoo object with err component of the result of
统计：zoo对象err组件的结果
The result of analyzeData is a list with two components:
analyzeData是list两部分组成：
stat: a zoo object with the time evolution of several statistics (mean, median, standard deviation, median absolute
统计：zoo对象的时间演化的一些统计（平均数，中位数，标准差，中位数绝对
err: a data.frame with the same number of rows as the number of columns of the x object. It contains several columns with the statistics of the diference between each unit and the
错误：data.framex对象的数目的列具有相同的行数。它包含多个列的统计，在每个单元之间和diference
（作者）----------Author(s)----------
Oscar Perpi帽谩n Lamigueiro.
参考文献----------References----------
M. A. M.; Helber, R. & Arnone, R. A. Summary diagrams for coupled hydrodynamic-ecosystem model skill assessment Journal of Marine Systems, 2009, 76, 64-82.
simulation of a two-axis tracking PV system, Solar Energy, 83:11(2074鈥 |
发表于 2012-9-30 11:47:53
