added in width adjustment
I thought it would be nice to show how to change the width of the plot.
Also with these types of plots it can be useful to stretch them horizontally.
@@ -13,7 +13,7 @@ line = alt.Chart(stocks).mark_line().encode(
x = 'date',
y = 'price',
color = 'symbol'
-).interactive()
+).properties(width=800).interactive()
rule = alt.Chart(stocks).mark_rule().encode(
y = alt.Y('average(price)', ),
