FEAT-Points Increase

src/streamlit_app.py

@@ -3,43 +3,38 @@ import numpy as np
 import pandas as pd
 import streamlit as st
 
-st.set_page_config(layout="wide")
+"""
+# Welcome to Streamlit!
 
-st.title("Fast Spiral Visualization")
+Edit `/streamlit_app.py` to customize this app to your heart's desire :heart:.
+If you have any questions, checkout our [documentation](https://docs.streamlit.io) and [community
+forums](https://discuss.streamlit.io).
+
+In the meantime, below is an example of what you can do with just a few lines of code:
+"""
 
 num_points = st.slider("Number of points in spiral", 1, 10000, 1100)
 num_turns = st.slider("Number of turns in spiral", 1, 300, 31)
 
+indices = np.linspace(0, 1, num_points)
+theta = 2 * np.pi * num_turns * indices
+radius = indices
 
-@st.cache_data(show_spinner=False)
-def generate_spiral(num_points, num_turns):
-    indices = np.linspace(0, 1, num_points, dtype=np.float32)
-    theta = 2 * np.pi * num_turns * indices
-
-    x = indices * np.cos(theta)
-    y = indices * np.sin(theta)
-
-    return pd.DataFrame({
-        "x": x,
-        "y": y,
-        "idx": indices,
-    })
-
+x = radius * np.cos(theta)
+y = radius * np.sin(theta)
 
-df = generate_spiral(num_points, num_turns)
+df = pd.DataFrame({
+    "x": x,
+    "y": y,
+    "idx": indices,
+    "rand": np.random.randn(num_points),
+})
 
-chart = (
-    alt.Chart(df, height=700, width=700)
-    .mark_circle(size=25)   # fixed size = much faster
+st.altair_chart(alt.Chart(df, height=700, width=700)
+    .mark_point(filled=True)
     .encode(
-        x=alt.X("x:Q", axis=None),
-        y=alt.Y("y:Q", axis=None),
-        color=alt.Color(
-            "idx:Q",
-            legend=None,
-            scale=alt.Scale(scheme="turbo")  # faster & nicer
-        ),
-    )
-)
-
-st.altair_chart(chart, use_container_width=True)
+        x=alt.X("x", axis=None),
+        y=alt.Y("y", axis=None),
+        color=alt.Color("idx", legend=None, scale=alt.Scale()),
+        size=alt.Size("rand", legend=None, scale=alt.Scale(range=[1, 150])),
+    ))