plot.ifile(Rwinsteps)
plot.ifile()所属R语言包：Rwinsteps
Plotting Item Staistics
绘制项目Staistics
译者：生物统计家园网 机器人LoveR
描述----------Description----------
These are Rasch model plot methods for item response functions, item inforamtion functions, item error functions, the test response function, the test information function, and the test error function, where each applies to an object of the corresponding class. plot.ifile summarizes the items within an ifile by plotting each of these functions in succession.
这些Rasch模型资料的响应函数，资料inforamtion函数，误差函数资料，测试响应函数，将测试信息的功能，和测试误差函数，其中每个适用于相应的类的一个对象的地积方法。 plot.ifile总结了这些功能在连续绘制每个项目内的ifile。
用法----------Usage----------
## S3 method for class 'ifile'
plot(x, theta = seq(-4, 4, length = 100),
subset = 1:nrow(x), ...)
## S3 method for class 'rirf'
plot(x, theta = x$theta, add = FALSE,
xlab = expression(theta), ylab = "P(X)", main = "IRF",
lwd = 2, col = "r", ...)
## S3 method for class 'riif'
plot(x, theta = x$theta, add = FALSE,
xlab = expression(theta), ylab = "Information", main = "IIF",
lwd = 2, col = "r", ...)
## S3 method for class 'rief'
plot(x, theta = x$theta, add = FALSE,
xlab = expression(theta), ylab = "Standard Error",
main = "IEF", lwd = 2, col = "r", ...)
## S3 method for class 'rtrf'
plot(x, theta = x$theta, xlab = expression(theta),
ylab = "Total", main = "TRF", lwd = 2, ...)
## S3 method for class 'rtif'
plot(x, theta = x$theta, xlab = expression(theta),
ylab = "Information", main = "TIF", lwd = 2, ...)
## S3 method for class 'rtef'
plot(x, theta = x$theta, xlab = expression(theta),
ylab = "Standard Error", main = "TEF", lwd = 2, ...)
参数----------Arguments----------
参数：x
for plot.ifile, an object of class “ifile”, otherwise, either an ifile or a vector of item locations
为plot.ifile，ifile的“类”，否则，无论是项目位置的ifile或矢量对象
参数：theta
optional vector of theta values over which the functions will be evaluated
Theta值的功能将被评估可选的向量
参数：subset
an index vector indicating the items to plot, as row numbers or item names if present in the ifile
索引向量表示要绘制的项目，如果存在的行号或产品名称，在ifile
参数：xlab
the x-axis label, as a string, defaulting to expression(theta)
x轴的标签，作为一个字符串，默认为expression(theta)
参数：ylab
the y-axis label, as a string, with default depending on the method
根据该方法的y轴的标签，作为一个字符串，使用默认的
参数：main
the plot title, with default depending on the method
根据图的标题，默认情况下的方法
参数：lwd
line width, as an integer, defaulting to 2
线条的宽度，为一个整数，缺省值为2
参数：col
vector of line colors, where the default "r" indicates a selection from the rainbow. Recycled if necessary
矢量线条颜色，其中默认的"r"表示选择从彩虹。必要时回收
参数：add
boolean, with default FALSE, indicating whether or not to add to the current plot
布尔值，指示是否在当前图上的默认FALSE，
参数：...
Further arguments passed to plot.default
更多参数传递给plot.default
（作者）----------Author(s)----------
Anthony Albano <a href="mailto:tony.d.albano@gmail.com">tony.d.albano@gmail.com</a>
参见----------See Also----------
ifile
ifile
实例----------Examples----------
plot(ifile(-2:2))
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。
注2：由于是机器人自动翻译，难免有不准确之处，使用时仔细对照中、英文内容进行反复理解，可以帮助R语言的学习。
注3：如遇到不准确之处，请在本贴的后面进行回帖，我们会逐渐进行修订。
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发表于 2012-9-29 20:57:48
