在Seaborn中为Python创建箱线图FacetGrid

问题描述

我正尝试在seaborn中创建4x4 FacetGrid，用于4个箱形图，根据虹膜数据集中的虹膜种类将每个箱形图分成3个箱形图。目前，我的代码如下：

I'm trying to create a 4x4 FacetGrid in seaborn for 4 boxplots, each of which is split into 3 boxplots based on the iris species in the iris dataset. Currently, my code looks like this:

sns.set(style="whitegrid")
iris_vis = sns.load_dataset("iris")

fig, axes = plt.subplots(2, 2)

ax = sns.boxplot(x="Species", y="SepalLengthCm", data=iris, orient='v',
    ax=axes[0])
ax = sns.boxplot(x="Species", y="SepalWidthCm", data=iris, orient='v',
    ax=axes[1])
ax = sns.boxplot(x="Species", y="PetalLengthCm", data=iris, orient='v',
    ax=axes[2])
ax = sns.boxplot(x="Species", y="PetalWidthCm", data=iris, orient='v',
    ax=axes[3])

但是，我从解释器中收到此错误：

However, I'm getting this error from my interpreter:

AttributeError: 'numpy.ndarray' object has no attribute 'boxplot'

我对属性错误的确切位置感到困惑。我需要更改什么？

I'm confused on where the attribute error is exactly in here. What do I need to change?

推荐答案

轴形状为（nrows，ncols）。在这种情况下是：

axes shape is (nrows, ncols). In this case is:

array([[<matplotlib.axes._subplots.AxesSubplot object at 0x7f4267f425f8>,
        <matplotlib.axes._subplots.AxesSubplot object at 0x7f4267f1bb38>],
       [<matplotlib.axes._subplots.AxesSubplot object at 0x7f4267ec95c0>,
        <matplotlib.axes._subplots.AxesSubplot object at 0x7f4267ef9080>]],
      dtype=object)

因此，当您执行 ax = axes [0] 会得到一个数组，而不是轴。尝试：

So, when you do ax=axes[0] you get a array and not the axes. Try:

fig, axes = plt.subplots(2, 2)

ax = sns.boxplot(x="Species", y="SepalLengthCm", data=iris, orient='v',
    ax=axes[0, 0])
ax = sns.boxplot(x="Species", y="SepalWidthCm", data=iris, orient='v',
    ax=axes[0, 1])
ax = sns.boxplot(x="Species", y="PetalLengthCm", data=iris, orient='v',
    ax=axes[1, 0])
ax = sns.boxplot(x="Species", y="PetalWidthCm", data=iris, orient='v',
    ax=axes[1, 1])

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