选择国内CRAN镜像加快安装R包.ipynb

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    "R使用install.packages 安装程序包时，由于默认选择国外CRAN镜像，会导致下载程序包特别慢，经常导致安装失败。"
   ]
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  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# 这时候就需要一条语句来指定国内CRAN"
   ]
  },
  {
   "cell_type": "raw",
   "metadata": {},
   "source": [
    "options(repos=structure(c(CRAN=\"https://mirrors.tuna.tsinghua.edu.cn/CRAN/\")))\n",
    "#清华大学镜像，速度会比国外的快很多"
   ]
  },
  {
   "cell_type": "raw",
   "metadata": {},
   "source": [
    "options(repos=structure(c(CRAN=\"http://mirrors.opencas.cn/cran/\")))\n",
    "#中国科学院大学的镜像"
   ]
  },
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   "cell_type": "code",
   "execution_count": null,
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   "source": []
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