fuji_blank.ipynb

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   "source": [
    "[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/gist/yuji96/306b7e87179722b5e90d096c0307e727/fuji_blank.ipynb)"
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   "cell_type": "code",
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   "source": [
    "# データの準備\n",
    "\n",
    "from math import cos, pi\n",
    "import random\n",
    "import numpy as np\n",
    "\n",
    "\n",
    "## 富士山の外形\n",
    "def f(x):\n",
    "    if abs(x) <= 1:\n",
    "        return x**4 - x**2 + 6 - 1\n",
    "    else:\n",
    "        return 12 / (abs(x) + 1) - 1\n",
    "\n",
    "\n",
    "def g(x):\n",
    "    return 1 / 2 * cos(2 * pi * x) + 7 / 2 - 1\n",
    "\n",
    "\n",
    "x1 = np.linspace(-5, 5, 100)\n",
    "fx = [f(x) for x in x1]\n",
    "\n",
    "x2 = np.linspace(-2, 2, 50)\n",
    "gx = [g(x) for x in x2]\n",
    "\n",
    "## 星の座標\n",
    "star_x = [random.uniform(-5, 5) for _ in range(15)]\n",
    "star_y = [random.uniform(f(x), 8) for x in star_x]\n",
    "\n",
    "## ビルの位置と高さ\n",
    "bldg_x = [random.uniform(-5, 5) for _ in range(10)]\n",
    "bldg_y = [random.uniform(0.5, 3) for _ in range(10)]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "import matplotlib.pyplot as plt"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "そのまま `plt.hoge()` を実行しただけだと物足りない。例えば、次のようなことができないだろうか。\n",
    "\n",
    "- 散布図の点を星にする\n",
    "- 星のサイズを変える\n",
    "- ビルの色を変える\n",
    "- ビルに枠線をつける"
   ]
  }
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