Updating chapters

Author: AllenDowney

chapters/chap11.py

@@ -26,7 +26,7 @@ def update_func(t, state, system):
 def plot_results(S, I, R):
     S.plot(style='--', label='Susceptible')
     I.plot(style='-', label='Infected')
-    R.plot(style=':', label='Resistant')
+    R.plot(style=':', label='Recovered')
     decorate(xlabel='Time (days)',
              ylabel='Fraction of population')
 

chapters/chap22.ipynb

@@ -987,7 +987,7 @@
    "id": "sustained-slide",
    "metadata": {},
    "source": [
-    "Inside the draw function, should use `decorate` to set the limits of the $x$ and $y$ axes.\n",
+    "Inside the draw function, you should use `decorate` to set the limits of the $x$ and $y$ axes.\n",
     "Otherwise `matplotlib` auto-scales the axes, which is usually not what you want.\n",
     "\n",
     "Now we can run the animation like this:\n",
@@ -1447,7 +1447,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.6"
+   "version": "3.10.13"
   }
  },
  "nbformat": 4,

chapters/chap22.py

@@ -21,7 +21,7 @@
 
 def make_system(params):
 
-    # convert angle to degrees
+    # convert angle to radians
     theta = deg2rad(params.angle)
 
     # compute x and y components of velocity