feat: Add starter code to plot scatterplot based on df, x, y

src/magmaviz/scatterplot.py

@@ -69,4 +69,14 @@ def scatterplot(df, x, y, c=""):
     assert is_numeric_dtype(df[y]), "The column assigned to 'y' axis is not of type numeric."
 
     # check if color column is numeric or not
-    assert is_string_dtype(df[c]), "The column assigned to 'color' is not of type string."
+    assert is_string_dtype(df[c]), "The column assigned to 'color' is not of type string."
+
+    if c == "":
+        plot = alt.Chart(
+            data=df
+        ).mark_point(
+            color="purple"
+        ).encode(
+            alt.X(x, title=f"{x}"),
+            alt.Y(y, title=f"{y}")
+        )