matplotlib histogram: how to display the count over the bar?

There is a new plt.bar_label method to automatically label bar containers.

plt.hist returns the bar container(s) as the third output:

data = np.random.default_rng(123).rayleigh(1, 70)
counts, edges, bars = plt.hist(data)
#              ^

plt.bar_label(bars)

If you have a grouped or stacked histogram, bars will contain multiple containers (one per group), so iterate:

fig, ax = plt.subplots()
counts, edges, bars = ax.hist([data, data * 0.3], histtype='barstacked')

for b in bars:
    ax.bar_label(b)

Note that you can also access the bar container(s) via ax.containers:

for c in ax.containers:
    ax.bar_label(c)

it seems hist can't do this,you can write some like :

your_bins=20
data=[]
arr=plt.hist(data,bins=your_bins)
for i in range(your_bins):
    plt.text(arr[1][i],arr[0][i],str(arr[0][i]))

Related