2020-11-03 14:29:22 +08:00
|
|
|
from collections import namedtuple
|
|
|
|
|
import altair as alt
|
|
|
|
|
import math
|
|
|
|
|
import pandas as pd
|
|
|
|
|
import streamlit as st
|
|
|
|
|
|
|
|
|
|
"""
|
|
|
|
|
# Welcome to Streamlit!
|
|
|
|
|
|
|
|
|
|
Edit `/streamlit_app.py` to customize this app to your heart's desire :heart:
|
|
|
|
|
|
2020-11-03 14:54:01 +08:00
|
|
|
If you have any questions, checkout our [documentation](https://docs.streamlit.io) and [community
|
|
|
|
|
forums](https://discuss.streamlit.io).
|
2020-11-03 14:29:22 +08:00
|
|
|
|
|
|
|
|
In the meantime, below is an example of what you can do with just a few lines of code:
|
|
|
|
|
"""
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
with st.echo(code_location='below'):
|
|
|
|
|
total_points = st.slider("Number of points in spiral", 1, 5000, 2000)
|
|
|
|
|
num_turns = st.slider("Number of turns in spiral", 1, 100, 9)
|
|
|
|
|
|
|
|
|
|
Point = namedtuple('Point', 'x y')
|
|
|
|
|
data = []
|
|
|
|
|
|
|
|
|
|
points_per_turn = total_points / num_turns
|
|
|
|
|
|
|
|
|
|
for curr_point_num in range(total_points):
|
|
|
|
|
curr_turn, i = divmod(curr_point_num, points_per_turn)
|
|
|
|
|
angle = (curr_turn + 1) * 2 * math.pi * i / points_per_turn
|
|
|
|
|
radius = curr_point_num / total_points
|
|
|
|
|
x = radius * math.cos(angle)
|
|
|
|
|
y = radius * math.sin(angle)
|
|
|
|
|
data.append(Point(x, y))
|
|
|
|
|
|
|
|
|
|
st.altair_chart(alt.Chart(pd.DataFrame(data), height=500, width=500)
|
|
|
|
|
.mark_circle(color='#0068c9', opacity=0.5)
|
|
|
|
|
.encode(x='x:Q', y='y:Q'))
|
