StarMirror/data-science-ipython-notebooks
1
0
Fork 0
mirror of https://github.com/donnemartin/data-science-ipython-notebooks.git synced 2024-03-22 13:30:56 +08:00
Code Issues Projects Releases Wiki Activity

Added snippets for basic Arithmetic and Data Alignment for DataFrames.

Browse Source
This commit is contained in:
Donne Martin 2015-01-31 07:37:05 -05:00
parent c2bf4dfda5
commit 418676f075
1 changed files with 186 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

186
pandas/pandas.ipynb
View File

@ -3415,6 +3415,192 @@
}
],
"prompt_number": 66
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"frame_8 = DataFrame(np.random.rand(9).reshape((3, 3)),\n",
" columns=['a', 'b', 'c'])\n",
"frame_8"
],
"language": "python",
"metadata": {},
"outputs": [
{
"html": [
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
"<table border=\"1\" class=\"dataframe\">\n",
" <thead>\n",
" <tr style=\"text-align: right;\">\n",
" <th></th>\n",
" <th>a</th>\n",
" <th>b</th>\n",
" <th>c</th>\n",
" </tr>\n",
" </thead>\n",
" <tbody>\n",
" <tr>\n",
" <th>0</th>\n",
" <td> 0.529893</td>\n",
" <td> 0.251433</td>\n",
" <td> 0.111151</td>\n",
" </tr>\n",
" <tr>\n",
" <th>1</th>\n",
" <td> 0.088052</td>\n",
" <td> 0.595180</td>\n",
" <td> 0.128917</td>\n",
" </tr>\n",
" <tr>\n",
" <th>2</th>\n",
" <td> 0.237248</td>\n",
" <td> 0.515434</td>\n",
" <td> 0.720097</td>\n",
" </tr>\n",
" </tbody>\n",
"</table>\n",
"</div>"
],
"metadata": {},
"output_type": "pyout",
"prompt_number": 67,
"text": [
" a b c\n",
"0 0.529893 0.251433 0.111151\n",
"1 0.088052 0.595180 0.128917\n",
"2 0.237248 0.515434 0.720097"
]
}
],
"prompt_number": 67
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"frame_9 = DataFrame(np.random.rand(9).reshape((3, 3)),\n",
" columns=['b', 'c', 'd'])\n",
"frame_9"
],
"language": "python",
"metadata": {},
"outputs": [
{
"html": [
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
"<table border=\"1\" class=\"dataframe\">\n",
" <thead>\n",
" <tr style=\"text-align: right;\">\n",
" <th></th>\n",
" <th>b</th>\n",
" <th>c</th>\n",
" <th>d</th>\n",
" </tr>\n",
" </thead>\n",
" <tbody>\n",
" <tr>\n",
" <th>0</th>\n",
" <td> 0.924304</td>\n",
" <td> 0.058943</td>\n",
" <td> 0.434582</td>\n",
" </tr>\n",
" <tr>\n",
" <th>1</th>\n",
" <td> 0.730805</td>\n",
" <td> 0.545480</td>\n",
" <td> 0.299172</td>\n",
" </tr>\n",
" <tr>\n",
" <th>2</th>\n",
" <td> 0.280603</td>\n",
" <td> 0.703927</td>\n",
" <td> 0.790074</td>\n",
" </tr>\n",
" </tbody>\n",
"</table>\n",
"</div>"
],
"metadata": {},
"output_type": "pyout",
"prompt_number": 68,
"text": [
" b c d\n",
"0 0.924304 0.058943 0.434582\n",
"1 0.730805 0.545480 0.299172\n",
"2 0.280603 0.703927 0.790074"
]
}
],
"prompt_number": 68
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Adding objects results in the union of index pairs for rows and columns if the pairs are not the same, resulting in NAs for indices that do not overlap:"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"frame_8 + frame_9"
],
"language": "python",
"metadata": {},
"outputs": [
{
"html": [
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
"<table border=\"1\" class=\"dataframe\">\n",
" <thead>\n",
" <tr style=\"text-align: right;\">\n",
" <th></th>\n",
" <th>a</th>\n",
" <th>b</th>\n",
" <th>c</th>\n",
" <th>d</th>\n",
" </tr>\n",
" </thead>\n",
" <tbody>\n",
" <tr>\n",
" <th>0</th>\n",
" <td>NaN</td>\n",
" <td> 1.175738</td>\n",
" <td> 0.170094</td>\n",
" <td>NaN</td>\n",
" </tr>\n",
" <tr>\n",
" <th>1</th>\n",
" <td>NaN</td>\n",
" <td> 1.325985</td>\n",
" <td> 0.674397</td>\n",
" <td>NaN</td>\n",
" </tr>\n",
" <tr>\n",
" <th>2</th>\n",
" <td>NaN</td>\n",
" <td> 0.796037</td>\n",
" <td> 1.424024</td>\n",
" <td>NaN</td>\n",
" </tr>\n",
" </tbody>\n",
"</table>\n",
"</div>"
],
"metadata": {},
"output_type": "pyout",
"prompt_number": 69,
"text": [
" a b c d\n",
"0 NaN 1.175738 0.170094 NaN\n",
"1 NaN 1.325985 0.674397 NaN\n",
"2 NaN 0.796037 1.424024 NaN"
]
}
],
"prompt_number": 69
}
],
"metadata": {}