{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "http://ww2.amstat.org/publications/jse/v21n1/witt.pdf\n", "\n", "http://nsidc.org/research/bios/fetterer.html\n", "\n", "ftp://sidads.colorado.edu/DATASETS/NOAA/G02135/north/monthly/data/N_08_extent_v3.0.csv" ] }, { "cell_type": "code", "execution_count": 1, "metadata": { "collapsed": true }, "outputs": [], "source": [ "import numpy as np\n", "import numpy.linalg as la\n", "import matplotlib.pyplot as plt\n", "%matplotlib inline\n", "\n", "import pandas as pd\n", "\n", "#from scipy import stats" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## Read Data" ] }, { "cell_type": "code", "execution_count": 2, "metadata": { "collapsed": true }, "outputs": [], "source": [ "data = pd.read_csv('N_09_extent_v3.0.csv', dtype={'year': np.int32, 'extent': np.double})" ] }, { "cell_type": "code", "execution_count": 3, "metadata": {}, "outputs": [ { "data": { "text/html": [ "
\n", " | year | \n", "mo | \n", "data-type | \n", "region | \n", "extent | \n", "area | \n", "
---|---|---|---|---|---|---|
0 | \n", "1979 | \n", "9 | \n", "Goddard | \n", "N | \n", "7.05 | \n", "4.58 | \n", "
1 | \n", "1980 | \n", "9 | \n", "Goddard | \n", "N | \n", "7.67 | \n", "4.87 | \n", "
2 | \n", "1981 | \n", "9 | \n", "Goddard | \n", "N | \n", "7.14 | \n", "4.44 | \n", "
3 | \n", "1982 | \n", "9 | \n", "Goddard | \n", "N | \n", "7.30 | \n", "4.43 | \n", "
4 | \n", "1983 | \n", "9 | \n", "Goddard | \n", "N | \n", "7.39 | \n", "4.70 | \n", "