1. 简介(The caret package )

caret包是R语言中用于机器学习的必备工具之一,提供了一系列函数来简化预测模型的创建过程,包括数据分割、预处理、特征选择及模型训练等。该包通过统一的接口为用户提供了一致的工作流程。

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译者话:博主正在学习caret包,觉得这个包对于学机器学习的人来说是必不可少的,它具有统一的模式或流程对模型进行处理、训练。caret包参数众多,而且有的函数还依赖于其他的包,这对于学习有一定的困难,不过有一篇技术文档专门介绍了caret包的使用,包括预处理、可视化、模型训练和调参等,但是直到现在我也没见有中文版介绍caret包的。今日突发感想,想把The caret package的文档翻译出来,这样即能把其中的程序走一遍,熟悉一下caret包的流程,也更能加深对caret包的理解,并且方便以后自己的阅读查看。由于博主是第一次翻译这么大的技术文档,这对于博主来说是一个很大的挑战,翻译之处可能有语句不通或一些错误的地方,欢迎大家批评指正!

caret包 作者:Max Kuhn
#1. 简介
caret包(_C_lassification_A_nd_RE_gression_T_raining的缩写)是一系列函数的集合,它试图对创建预测模型的过程进行流程化。caret包包含了解决以下问题的工具:

  • 数据分割
  • 预处理
  • 特征选择
  • 用重抽样进行模型调参
  • 变量重要性估计
    等还有其他一些功能。
    在R中还有很多建模函数,一些函数对建模训练和(或)预测有不同的语法。caret包提供了对函数统一的界面,还有对普通任务进行标准化(例如调参和变量重要性)。
    最新的版本能在CRAN上找到,工程放在了github上。
    一些资源:
  • 《应用预测建模》突出了caret包和超过40个其他的R包。在亚马逊或出版社的官网上有售。这是这本书的网站
  • Journal of Statistical Soteware期刊上有关于caret包的文章。数据可以从这获得。
  • 这是caret包在Youtube上的在线会议,是有Orange County R用户组的Ray DiGiacomoJr组织并录制。
  • 在useR!2014,我受访并讨论了caret包和这本书。
  • DataCamp有一个使用caret包的课程:beginner’s tutorial on machine learning in R
    你有问题、评论或建议可以email我。
    这些HTML网页由bookdown制作。
bashrc文件如下# ~/.bashrc: executed by bash(1) for non-login shells. # see /usr/share/doc/bash/examples/startup-files (in the package bash-doc) # for examples # If not running interactively, don't do anything case $- in *i*) ;; *) return;; esac # don't put duplicate lines or lines starting with space in the history. # See bash(1) for more options HISTCONTROL=ignoreboth # append to the history file, don't overwrite it shopt -s histappend # for setting history length see HISTSIZE and HISTFILESIZE in bash(1) HISTSIZE=1000 HISTFILESIZE=2000 # check the window size after each command and, if necessary, # update the values of LINES and COLUMNS. shopt -s checkwinsize # If set, the pattern "**" used in a pathname expansion context will # match all files and zero or more directories and subdirectories. #shopt -s globstar # make less more friendly for non-text input files, see lesspipe(1) [ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)" # set variable identifying the chroot you work in (used in the prompt below) if [ -z "${debian_chroot:-}" ] && [ -r /etc/debian_chroot ]; then debian_chroot=$(cat /etc/debian_chroot) fi # set a fancy prompt (non-color, unless we know we "want" color) case "$TERM" in xterm-color|*-256color) color_prompt=yes;; esac # uncomment for a colored prompt, if the terminal has the capability; turned # off by default to not distract the user: the focus in a terminal window # should be on the output of commands, not on the prompt #force_color_prompt=yes if [ -n "$force_color_prompt" ]; then if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then # We have color support; assume it's compliant with Ecma-48 # (ISO/IEC-6429). (Lack of such support is extremely rare, and such # a case would tend to support setf rather than setaf.) color_prompt=yes else color_prompt= fi fi if [ "$color_prompt" = yes ]; then PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ ' else PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ ' fi unset color_prompt force_color_prompt # If this is an xterm set the title to user@host:dir case "$TERM" in xterm*|rxvt*) PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1" ;; *) ;; esac # enable color support of ls and also add handy aliases if [ -x /usr/bin/dircolors ]; then test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)" alias ls='ls --color=auto' #alias dir='dir --color=auto' #alias vdir='vdir --color=auto' alias grep='grep --color=auto' alias fgrep='fgrep --color=auto' alias egrep='egrep --color=auto' fi # colored GCC warnings and errors #export GCC_COLORS='error=01;31:warning=01;35:note=01;36:caret=01;32:locus=01:quote=01' # some more ls aliases alias ll='ls -alF' alias la='ls -A' alias l='ls -CF' # Add an "alert" alias for long running commands. Use like so: # sleep 10; alert alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//'\'')"' # Alias definitions. # You may want to put all your additions into a separate file like # ~/.bash_aliases, instead of adding them here directly. # See /usr/share/doc/bash-doc/examples in the bash-doc package. if [ -f ~/.bash_aliases ]; then . ~/.bash_aliases fi # enable programmable completion features (you don't need to enable # this, if it's already enabled in /etc/bash.bashrc and /etc/profile # sources /etc/bash.bashrc). if ! shopt -oq posix; then if [ -f /usr/share/bash-completion/bash_completion ]; then . /usr/share/bash-completion/bash_completion elif [ -f /etc/bash_completion ]; then . /etc/bash_completion fi fi export PYTHONPATH=$PYTHONPATH:/usr/lib/python3.8/dist-packages source /opt/ros/noetic/setup.bash source ~/ackermann_ws/devel/setup.bash source /opt/ros/noetic/setup.bash source /home/wz602-1/Downloads/yunzong/Sunray_swarm/devel/setup.bash # >>> conda initialize >>> # !! Contents within this block are managed by 'conda init' !! __conda_setup="$('/home/wz602-1/miniconda3/bin/conda' 'shell.bash' 'hook' 2> /dev/null)" if [ $? -eq 0 ]; then eval "$__conda_setup" else if [ -f "/home/wz602-1/miniconda3/etc/profile.d/conda.sh" ]; then . "/home/wz602-1/miniconda3/etc/profile.d/conda.sh" else export PATH="/home/wz602-1/miniconda3/bin:$PATH" fi fi unset __conda_setup # <<< conda initialize <<< source /home/wz602-1/catkin_ws/devel/setup.bash export ROS_PACKAGE_PATH=${ROS_PACKAGE_PATH}:~/catkin_ws/ source /opt/ros/noetic/setup.bash export GTK_IM_MODULE=fcitx export XMODIFIERS=@im=fcitx export QT_IM_MODULE=fcitx
最新发布
07-15
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