Exercise 2: Add error bars to a histogram

(5 minutes)

We’re still plotting the chi2 histogram as a solid curve. Most of the time, your supervisor will want to see histograms with errors. Revise the line in the Warp-up section to draw the histograms with error bars.

Hint

Look back at Working with Histograms.

Look carefully

The histogram may not be immediately visible, because all the points are squeezed into the left-hand side of the plot. We’ll investigate the reason why in a subsequent exercise.

Figure 30: What I get when I plot chi2 with errors bars turned on.

This plot required special handling

See this note in the Python tutorial for how I made this plot.