使用子图设置matplotlib / seaborn中的边距

时间:2015-12-09 20:03:33

标签: python matplotlib seaborn

我使用以下方法绘制matplotlib / seaborn中的子图:

plt.figure()
s1 = plt.subplot(2, 1, 1)
# plot 1 
# call seaborn here
s2 = plt.subplot(2, 1, 2)
# plot 2
plt.tight_layout()
plt.show()

我遇到了被轴隐藏的标记的常见问题(Add margin when plots run against the edge of the graph)。当我尝试调整边距时,它不起作用:

s1 = plt.subplot(2, 1, 1)
s1.margins(0.05)

它没有错误,但也没有设置边距。

这是一个完整的示例:

gammas = sns.load_dataset("gammas")
s = plt.subplot(1, 1, 1)
# this does not change the x margins
s.get_axes().margins(x=0.05, y=0.01)
ax = sns.tsplot(time="timepoint", value="BOLD signal",
                unit="subject", condition="ROI",
                err_style="ci_bars",
                interpolate=False,
                data=gammas)
plt.show()

在上面,我试图让x-margin更大,但x的{​​{1}}参数似乎没有效果。怎么办呢?

1 个答案:

答案 0 :(得分:3)

您可以定义一个函数,将xy范围的给定部分添加到边距,这样可以使用get_xlimget_ylim,{{1 }和set_xlim。使用最小的例子:

set_ylim

打印哪些:

import matplotlib.pyplot as plt
import seaborn as sns

def add_margin(ax,x=0.05,y=0.05):
    # This will, by default, add 5% to the x and y margins. You 
    # can customise this using the x and y arguments when you call it.

    xlim = ax.get_xlim()
    ylim = ax.get_ylim()

    xmargin = (xlim[1]-xlim[0])*x
    ymargin = (ylim[1]-ylim[0])*y

    ax.set_xlim(xlim[0]-xmargin,xlim[1]+xmargin)
    ax.set_ylim(ylim[0]-ymargin,ylim[1]+ymargin)

gammas = sns.load_dataset("gammas")
s = plt.subplot(1, 1, 1)
ax = sns.tsplot(time="timepoint", value="BOLD signal",
                unit="subject", condition="ROI",
                err_style="ci_bars",
                interpolate=False,
                data=gammas)

# Check what the original limits were
x0,y0=s.get_xlim(),s.get_ylim()

# Update the limits using set_xlim and set_ylim
add_margin(s,x=0.05,y=0.01) ### Call this after tsplot 

# Check the new limits
x1,y1=s.get_xlim(),s.get_ylim()

# Print the old and new limits
print x0,y0
print x1,y1

plt.show()

这是产生的数字:

enter image description here

与原始数字相比,显然增加了利润率:

enter image description here