rp.doublebutton(rpanel)
rp.doublebutton()所属R语言包：rpanel
Double-button widget for rpanel
双按钮部件rpanel
译者：生物统计家园网 机器人LoveR
描述----------Description----------
Adds a widget with '+' and '-' buttons, to increment and decrement a variable.
添加小部件“+”和“ - ”按钮，递增和递减一个变量。
用法----------Usage----------
rp.doublebutton(panel, var, step, title = deparse(substitute(var)), action = I,
initval = NULL, range = c(NA, NA), log = FALSE, showvalue = FALSE, showvaluewidth = 4,
repeatinterval = 100, repeatdelay = 100, parent = window, pos = NULL, ...)
参数----------Arguments----------
参数：panel
the panel in which the doublebutton should appear. This may be passed as a panelname string or the panel object itself.
面板应该出现的doublebutton的。这可能是通过作为一个panelname的字符串或面板对象本身。
参数：var
the name of the variable within the panel that the doublebutton should control.
这个名字的变量，doublebutton应控制面板内的。
参数：step
the value by which the variable "var" is incremented or decremented on pressing a button. When log is TRUE this is a factor instead.
值的变量“VAR”递增或递减，在按下一个按钮。当log是TRUE，这是一个因素。
参数：action
the function which is called when a button is pressed.
当一个按钮被按下时，调用的函数。
参数：title
the label for the doublebutton. This defaults to the name of var.
标签为doublebutton。这将默认为VAR的名称。
参数：parent
this specifies the widget inside which this widget should appear. In the current version, it should not normally be used.
指定小工具，里面这个小部件出现。在目前的版本中，它不应该被使用。
参数：initval
the initial value for var (optional). The initial value can also be specified in the call to rp.control.
的初始值的VAR（可选）。的初始值，也可以指定在调用rp.control。
参数：range
a 2-element numeric vector containing lower and upper limits for var. Use NA for no limit (upper and/or lower).
一个2元素的数值向量含有的上限和下限的变种。使用NA没有限制（上部和/或下部）。
参数：log
a logical variable which determines whether the increment (step) is multiplicative or additive.
一个逻辑变量的增量（步骤），它确定是否是乘法或添加剂。
参数：showvalue
a logical variable which determines whether the present value of "var" is shown between the + and - buttons. This is forced to FALSE when log is TRUE.
一个逻辑变量确定的现值之间的“无功”“+”和“ - ”按钮。这是被迫log是TRUE FALSE时。
参数：showvaluewidth
defines the width of the shown value in characters.
定义所示的值的宽度，以字符为单位。
参数：repeatinterval
the interval between auto-repeats (milliseconds) when the button is held down.
按住按钮时，自动重复（毫秒）之间的时间间隔。
参数：repeatdelay
the time after which the button starts to auto-repeat (milliseconds).
按钮开始自动重复（毫秒）的时间。
参数：pos
the layout instructions. Please see the rp.pos example and help for full details.
布局说明。请看看rp.pos榜样和帮助的完整细节。
参数：...
information for pos can be passed individually as additional arguments.
pos的信息可以通过单独作为附加参数。
Details
详细信息----------Details----------
action should be a function of one argument, which should be the panel. The panel can then be manipulated, and data stored in the panel may be used/modified, then the (optionally modified) panel must be returned.
action应该是一个参数的函数，这应该是面板。然后，面板可以被操纵，并且然后必须返回（任选修改）面板，面板中的存储的数据，可以使用/修改。
See rp.grid for details of the grid layout system.
见rp.grid的网格布局系统的详细信息。
值----------Value----------
If the parameter panel is the panelname string the same string is returned. If the panel object is used the altered panel is assigned to both the calling level and panel's environment level.
如果该参数面板是panelname的的字符串相同的字符串返回。如果面板对象是用来改变的面板被分配到的层次和面板的环境。
警告----------Warning----------
The action function should return the panel. Without this assignment any widgets added or alterations made to panel parameters within the action function will be lost.<br> <br> Note that setting log=TRUE and showvalue=TRUE is not allowed. The slider value shown would be incorrect (it wouldn't be the log value) and so showvalue is over-ridden and set to FALSE. A new widget rp.label is under development which would be used in these circumstances.
action函数应该返回面板。如果没有这个任务添加任何部件或在action功能面板参数的改变将会丢失。<br> <br>请注意，设置记录= TRUE和showvalue的的= TRUE是不允许的。滑块显示的值是不正确的（它不会是log中值）和，所以showvalue缠身的设置为false。在这种情况下，将使用一个新的Widget rp.label正在开发。
参考文献----------References----------
rpanel: Simple interactive controls for R functions using the tcltk package. Journal of Statistical Software, 17, issue 9.
参见----------See Also----------
rp.radiogroup,rp.control
rp.radiogroup，rp.control
实例----------Examples----------
if (interactive()) {
density.draw <- function(panel) {
plot(density(panel$x, bw = panel$h))
panel
}
panel <- rp.control(x = rnorm(50))
rp.doublebutton(panel, var = h, step = 0.05,
title = "Density estimate", action = density.draw,
range = c(0.1, 5), initval=1)
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 2012-9-27 23:42:11
