eaxis(sfsmisc)
eaxis()所属R语言包：sfsmisc
Extended / Engineering Axis for Graphics
延期/工程为图形的轴
译者：生物统计家园网 机器人LoveR
描述----------Description----------
An extended axis() function which labels more prettily, in particular for log-scale axes.
扩展axis()函数标签更加娇滴滴的，特别是log规模轴。
It makes use of plotmath expressions of the form k * 10^k for labeling a log-scaled axis and when otherwise exponentional formatting would be used.
它使用的plotmath expression的形式k * 10^k标记的对数标度的轴，当，否则exponentional格式化使用。
用法----------Usage----------
eaxis(side, at = ,
labels = NULL, log = NULL,
f.smalltcl = 3/5, at.small = NULL, small.mult = NULL,
draw.between.ticks = TRUE,
outer.at = TRUE, drop.1 = TRUE, las = 1,
nintLog = max(10, par("lab")[2 - is.x]), max.at = Inf, ...)
参数----------Arguments----------
参数：side
integer in 1:4, specifying side of axis.
在1:4的整数，指定侧的axis。
参数：at
numeric vector of (“normalsized”) tick locations; by default axTicks(side, ..), i.e., the same as axis() would use.
数字向量的（“normalsized”）剔位置，默认情况下axTicks(side, ..)，即，一样axis()的会使用。
参数：labels
NULL (default), logical, character or expression, as in axis(); in addition, if NA, labels = TRUE is passed to axis(), i.e. pretty10exp is not used. Use FALSE to suppress any labeling.
NULL（默认），logical，character或expression，如axis();此外，如果NA，labels = TRUE是传给axis()，即pretty10exp不使用。使用FALSE抑制任何标签。
参数：log
logical or NULL specifying if log-scale should be used; the default depends on the current plot's axis.
逻辑或NULL如果指定log规模应使用缺省值取决于当前图形的轴。
参数：f.smalltcl
factor specifying the lengths of the small ticks in proportion to the normalsized, labeled ticks.
因素确定的小比例的normalsized，标记刻度线刻度线的长度。
参数：at.small
locations of small ticks; the default, NULL, uses small.mult and constructs “smart” locations.
小刻度线的位置，默认情况下，NULL使用small.mult和构建“智能”的位置。
参数：small.mult
positive integer (or NULL), used when at.small is NULL to indicate which multiples of at (typically axTicks()) should be used as “small ticks”. The default NULL will use 9 in the log case and a number in 2:5 otherwise. </table>
正整数（或NULL），使用时at.small是NULL表示at（通常axTicks()）的倍数，应使用“小滴答”的。将使用的默认NULL 9在log的情况下，一些在2:5，否则。 </ TABLE>
参数：draw.between.ticks
(only if log is true): logical indicating that possible (non-small) ticks between the labeled (via at) ones should be drawn as well (and possibly also used for at.small construction).
（只有log是真实的）：逻辑表示可能（非小）之间的标记（通过at）的刻度线，应制定以及（也可能用于at.small的建设期）。
参数：outer.at
logical specifying that at.small should also be constructed outside the at range, but still inside the corresponding par("usr").
逻辑指定at.small应该也可以构建at范围之外，但仍留在对应的par("usr")。
参数：drop.1
logical specifying if "1 *" should be dropped from labels, passed to pretty10exp().
逻辑指定传递给"1 *"如果pretty10exp()应该被丢弃的标签，。
参数：nintLog
only used in R > 2.13.x, when log is true: approximate (lower bound on) number of intervals for log scaling.
只用在R> 2.13.x，当log是真实的：近似数（下限）的log缩放的间隔。
参数：max.at
maximal number of at values to be used effectively. If you don't specify at yourself carefully, it is recommended to set this to something like 25.
at的最大数量值，以有效地使用。如果你不指定at：“你自己小心，建议将其设置为类似25。
参数：las, ...
arguments passed to (the first) axis call. Note that the default las = 1 differs from axis's default las = 0.
参数传递给（第一）axis调用。注意的默认las = 1不同从axis的默认las = 0。
（作者）----------Author(s)----------
Martin Maechler
参见----------See Also----------
axis, axTicks, axTexpr, pretty10exp.
axis，axTicks，axTexpr，pretty10exp。
实例----------Examples----------
x <- lseq(1e-10, 0.1, length = 201)
plot(x, pt(x, df=3), type = "l", xaxt = "n", log = "x")
eaxis(1)
## without small ticks:[＃不小刻度线：]
eaxis(3, at.small=FALSE, col="blue")
## If you like the ticks, but prefer traditional (non-"plotmath") labels:[＃如果你喜欢的刻度线，但更喜欢传统的（非“plotmath”）标签：]
plot(x, gamma(x), type = "l", log = "x")
eaxis(1, labels=NA)
x <- lseq(.001, 0.1, length = 1000)
plot(x, sin(1/x)*x, type = "l", xaxt = "n", log = "x")
eaxis(1)
## non- log-scale : draw small ticks, but no "10^k" if not needed:[＃非log规模：画小刻度线，但没有“K”，如果没有必要：]
x <- seq(-100, 100, length = 1000)
plot(x, sin(x)/x, type = "l", xaxt = "n")
eaxis(1)
x <- seq(-1, 1, length = 1000)
plot(x, sin(x)/x, type = "l", xaxt = "n")
eaxis(1)
x <- x/1000
plot(x, 1-sin(x)/x, type = "l", xaxt = "n", yaxt = "n")
eaxis(1)
eaxis(2)
## more labels than default:[预设多个标签：]
op <- par(lab=c(10,5,7))
plot(x, sin(x)/x, type = "l", xaxt = "n")
eaxis(1) # maybe (depending on your canvas), there are too many,[也许（这取决于你的画布），有太多，]
## in that case, maybe use[＃在这种情况下，可能使用]
plot(x, sin(x)/x, type = "l", xaxt = "n")
eaxis(1, axTicks(1)[c(TRUE,FALSE)]) # drop every 2nd label[下降每2标签]
eaxis(3, labels=FALSE)
## ore use 'max.at' which thins as well:[＃矿使用“max.at”，以及变薄：]
plot(x, sin(x)/x, type = "l", xaxt = "n")
eaxis(1, max.at=6)
par(op)
## From R version 2.14.0, on, this looks better[＃从R版本2.14.0，上，这看起来更好]
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注：
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发表于 2012-9-30 01:36:48
