双质量曲线

Question

我试图检查来自各个监测站的降雨数据的趋势，我想使用双质量曲线函数，但是当我试图安装am曲线包时，我会得到以下错误：

包“dmcurve”不可用(对于RVersion3.6.2)。

Answer 1

我知道这是一个重复，但评论过程似乎没有“工作”。下面是一个控制台屏幕，说明需要设置dependencies=TRUE并执行library调用来加载包：

> install.packages("lfstat", dependencies=TRUE)
also installing the dependency ‘lmomRFA’

trying URL 'https://cloud.r-project.org/bin/macosx/el-capitan/contrib/3.6/lmomRFA_3.3.tgz'
Content type 'application/x-gzip' length 435665 bytes (425 KB)
==================================================
downloaded 425 KB

trying URL 'https://cloud.r-project.org/bin/macosx/el-capitan/contrib/3.6/lfstat_0.9.4.tgz'
Content type 'application/x-gzip' length 855964 bytes (835 KB)
==================================================
downloaded 835 KB


The downloaded binary packages are in
    /var/folders/68/vh2f8kzn09j8954r6q9100yh0000gn/T//RtmpvvgGGI/downloaded_packages
> ?dmcurve
No documentation for ‘dmcurve’ in specified packages and libraries:
you could try ‘??dmcurve’
#  The package was installed but not loaded
> library(lfstat)
Loading required package: xts
Loading required package: zoo

Attaching package: ‘zoo’

The following objects are masked from ‘package:base’:

    as.Date, as.Date.numeric

Loading required package: lmom
Loading required package: lattice
> ?dmcurve    # brings up help page

您可以看到，我的软件包库中没有pkg:lmomRFA，但是由于将依赖项参数设置为TRUE，所以安装了它。您还可以执行：

packageDescription("lfstat")
# which prints the package's DESCRIPTION file

Package: lfstat
Type: Package
Title: Calculation of Low Flow Statistics for Daily Stream Flow Data
Version: 0.9.4
### snipped several lines ###
Depends: R (>= 2.10), xts, lmom, lattice
Imports: lmomRFA, dygraphs, zoo, latticeExtra, plyr

所以很显然我已经安装了大部分的要求。也不是说没有在Depends:列表中的包(pkg:动物园)被自动加载。这是由'xts‘包加载的第二个级别依赖项。因此，如果库路径中还没有加载错误，则可能会在加载过程中出错。