# 简单的轴线

![简单的轴线](https://matplotlib.org/_images/sphx_glr_simple_axisline_001.png)

```python
import matplotlib.pyplot as plt

from mpl_toolkits.axisartist.axislines import SubplotZero


fig = plt.figure(1)
fig.subplots_adjust(right=0.85)
ax = SubplotZero(fig, 1, 1, 1)
fig.add_subplot(ax)

# make right and top axis invisible
ax.axis["right"].set_visible(False)
ax.axis["top"].set_visible(False)

# make xzero axis (horizontal axis line through y=0) visible.
ax.axis["xzero"].set_visible(True)
ax.axis["xzero"].label.set_text("Axis Zero")

ax.set_ylim(-2, 4)
ax.set_xlabel("Label X")
ax.set_ylabel("Label Y")
# or
#ax.axis["bottom"].label.set_text("Label X")
#ax.axis["left"].label.set_text("Label Y")

# make new (right-side) yaxis, but with some offset
offset = (20, 0)
new_axisline = ax.get_grid_helper().new_fixed_axis

ax.axis["right2"] = new_axisline(loc="right", offset=offset, axes=ax)
ax.axis["right2"].label.set_text("Label Y2")

ax.plot([-2, 3, 2])
plt.show()
```

## 下载这个示例
            
- [下载python源码: simple_axisline.py](https://matplotlib.org/_downloads/simple_axisline.py)
- [下载Jupyter notebook: simple_axisline.ipynb](https://matplotlib.org/_downloads/simple_axisline.ipynb)