expressionFilter-class(flowCore)
expressionFilter-class()所属R语言包：flowCore
Class "expressionFilter"
类“expressionFilter”
译者：生物统计家园网 机器人LoveR
描述----------Description----------
A filter holding an expression that can be evaluated to a logical vector or a vector of factors.
一个filter表达一个可以评估一个逻辑向量或向量的因素。
用法----------Usage----------
expressionFilter(expr, ..., filterId="defaultExpressionFilter")
char2ExpressionFilter(expr, ..., filterId="defaultExpressionFilter")
参数----------Arguments----------
参数：filterId
An optional parameter that sets the filterId of this filter. The object can later be identified by this name.
一个可选的参数设置，这个filterIdfilter。对象可以在以后确定了这个名字。
参数：expr
A valid R expression or a character vector that can be parsed into an expression.
一个有效的R表达或可以解析成一个表达式字符向量。
参数：...
Additional arguments that are passed to the evaluation environment of the expression.
额外的参数传递给评估环境的表达。
Details
详情----------Details----------
The expression is evaluated in the environment of the flow cytometry values, hence the parameters of a flowFrame can be accessed through regular R symbols. The convenience function char2ExpressionFilter exists to programmatically construct expressions.
表达的流式单元仪检测值的环境评估，因此flowFrame参数可以访问通过定期ŕ符号。方便的功能char2ExpressionFilter存在以编程方式构建表达式。
值----------Value----------
Returns a expressionFilter object for use in filtering flowFrames or other flow cytometry objects.
使用过滤expressionFilters或其他流式单元仪检测对象返回一个flowFrame对象。
延伸----------Extends----------
Class "concreteFilter", directly.
类"concreteFilter"，直接。
Class "filter", by class concreteFilter, distance 2.
类"filter"类concreteFilter，距离2。
插槽----------Slots----------
expr: The expression that will be evaluated in the
expr：将在评估的表达
args: An environment providing additional parameters.
args：一种环境，提供额外的参数。
deparse: A character scalar of the deparsed expression.
deparse：一个的deparsed表达式的字符标。
filterId: The identifier of the filter
filterId：过滤器的标识符
类的对象----------Objects from the Class----------
Objects can be created by calls of the form new("expressionFilter", ...), using the expressionFilter constructor or, programmatically, from a character string using the char2ExpressionFilter function.
对象可以创建检测形式new("expressionFilter", ...)，使用expressionFilter构造函数或从一个字符串，编程，使用char2ExpressionFilter功能。
方法----------Methods----------
%in% signature(x = "flowFrame", table = "expressionFilter"): The workhorse used to evaluate the gate on data. This is usually not called directly by the user, but
在％signature(x = "flowFrame", table = "expressionFilter")：用来评估数据门的主力。这通常不是直接调用的用户，但
show signature(object = "expressionFilter"): Print
显示signature(object = "expressionFilter")：打印
作者（S）----------Author(s)----------
F. Hahne, B. Ellis
参见----------See Also----------
flowFrame, filter for evaluation of sampleFilters and split and Subsetfor splitting and subsetting of flow cytometry data sets based on that.
flowFrame，filtersampleFilters和split和Subset分裂和流式单元仪数据的子集设置此基础上的评估。
举例----------Examples----------
## Loading example data[＃载入数据为例]
dat <- read.FCS(system.file("extdata","0877408774.B08",
package="flowCore"))
#Create the filter[创建过滤器]
ef <- expressionFilter(`FSC-H` > 200, filterId="myExpressionFilter")
ef
## Filtering using sampeFilters[＃过滤使用sampeFilters]
fres <- filter(dat, ef)
fres
summary(fres)
## The result of sample filtering is a logical subset[＃样本过滤的结果是一个逻辑子集]
newDat <- Subset(dat, fres)
all(exprs(newDat)[,"FSC-H"] > 200)
## We can also split, in which case we get those events in and those[＃我们也可以分裂，在这种情况下，我们得到这些事件和那些]
## not in the gate as separate populations[＃而不是作为单独的种群门]
split(dat, fres)
## Programmatically construct an expression[＃编程构建一个表达式]
dat <- dat[,-8]
r <- range(dat)
cn <- paste("`", colnames(dat), "`", sep="")
exp <- paste(cn, ">", r[1,], "&", cn, "<", r[2,], collapse=" & ")
ef2 <- char2ExpressionFilter(exp, filterId="myExpressionFilter")
ef2
fres2 <- filter(dat, ef2)
fres2
summary(fres2)
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注：
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发表于 2012-2-25 17:41:52
