{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Line Charts\n",
"\n",
"* [Simple line chart](#Simple-line-chart)\n",
" * [Data transform in Vega-Lite](#Data-transform-in-Vega-Lite)\n",
" * [Data transform in Pandas](#Data-transform-in-Pandas)\n",
" * [Log scale](#Log-scale)\n",
"* [Grouped line chart](#Grouped-line-chart)\n",
"* [Line chart with custom path](#Line-chart-with-custom-path)"
]
},
{
"cell_type": "code",
"execution_count": 1,
"metadata": {},
"outputs": [],
"source": [
"import altair as alt"
]
},
{
"cell_type": "code",
"execution_count": 2,
"metadata": {},
"outputs": [],
"source": [
"from vega_datasets import data\n",
"stocks = data.stocks()"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Simple line chart"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### Data transform in Vega-Lite"
]
},
{
"cell_type": "code",
"execution_count": 3,
"metadata": {},
"outputs": [
{
"data": {
"text/html": [
"\n",
"\n",
""
],
"text/plain": [
"alt.Chart(...)"
]
},
"execution_count": 3,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"alt.Chart(stocks).mark_line().encode(\n",
" x='date:T',\n",
" y='price:Q'\n",
").transform_filter(\"datum.symbol == 'GOOG'\")"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### Data transform in Pandas"
]
},
{
"cell_type": "code",
"execution_count": 4,
"metadata": {},
"outputs": [
{
"data": {
"text/html": [
"\n",
"\n",
""
],
"text/plain": [
"alt.Chart(...)"
]
},
"execution_count": 4,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"GOOG = stocks.query('symbol == \"GOOG\"')\n",
"\n",
"alt.Chart(GOOG).mark_line().encode(\n",
" x='date:T',\n",
" y='price:Q'\n",
")"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### Log scale"
]
},
{
"cell_type": "code",
"execution_count": 5,
"metadata": {
"scrolled": true
},
"outputs": [
{
"data": {
"text/html": [
"\n",
"\n",
""
],
"text/plain": [
"alt.Chart(...)"
]
},
"execution_count": 5,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"alt.Chart(GOOG).mark_line().encode(\n",
" y=alt.Y('price:Q', scale=alt.Scale(type='log')),\n",
" x='date:T',\n",
")"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Grouped line chart"
]
},
{
"cell_type": "code",
"execution_count": 6,
"metadata": {},
"outputs": [
{
"data": {
"text/html": [
"\n",
"\n",
""
],
"text/plain": [
"alt.Chart(...)"
]
},
"execution_count": 6,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"alt.Chart(stocks).mark_line().encode(\n",
" x='date:T',\n",
" y='price',\n",
" color='symbol',\n",
")"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Line chart with custom path"
]
},
{
"cell_type": "code",
"execution_count": 7,
"metadata": {},
"outputs": [
{
"data": {
"text/html": [
"\n",
"\n",
""
],
"text/plain": [
"alt.Chart(...)"
]
},
"execution_count": 7,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"driving = data.driving()\n",
"\n",
"alt.Chart(driving).mark_line().encode(\n",
" alt.X('miles', scale=alt.Scale(zero=False)),\n",
" alt.Y('gas', scale=alt.Scale(zero=False)),\n",
" order='year:T',\n",
")"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Layer points and lines with custom path"
]
},
{
"cell_type": "code",
"execution_count": 8,
"metadata": {},
"outputs": [
{
"data": {
"text/html": [
"\n",
"\n",
""
],
"text/plain": [
"alt.LayerChart(...)"
]
},
"execution_count": 8,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"base = alt.Chart(driving).encode(\n",
" alt.X('miles', scale=alt.Scale(zero=False)),\n",
" alt.Y('gas', scale=alt.Scale(zero=False)),\n",
" order='year:T',\n",
")\n",
"\n",
"base.mark_line() + base.mark_point()"
]
}
],
"metadata": {
"anaconda-cloud": {},
"kernelspec": {
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.7.6"
}
},
"nbformat": 4,
"nbformat_minor": 4
}