應用: 深入淺出python機器學習_如何用python畫(繪制)二維函數(二維圖)?
https://blog.csdn.net/Dontla/article/details/98501737

作用就是設置圖像的軸的一系列屬性

直接上官方文檔:

Signature: plt.axis(*args, **kwargs)
Docstring:
Convenience method to get or set some axis properties.

Call signatures::

xmin, xmax, ymin, ymax = axis()
xmin, xmax, ymin, ymax = axis([xmin, xmax, ymin, ymax])
xmin, xmax, ymin, ymax = axis(option)
xmin, xmax, ymin, ymax = axis(**kwargs)

Parameters

xmin, xmax, ymin, ymax : float, optional
The axis limits to be set. Either none or all of the limits must
be given.

option : bool or str
If a bool, turns axis lines and labels on or off. If a string,
possible values are:

======== ========================================================== Value Description ======== ========================================================== 'on' Turn on axis lines and labels. Same as ``True``. 'off' Turn off axis lines and labels. Same as ``False``. 'equal' Set equal scaling (i.e., make circles circular) bychanging axis limits. 'scaled' Set equal scaling (i.e., make circles circular) bychanging dimensions of the plot box. 'tight' Set limits just large enough to show all data. 'auto' Automatic scaling (fill plot box with data). 'normal' Same as 'auto'; deprecated. 'image' 'scaled' with axis limits equal to data limits. 'square' Square plot; similar to 'scaled', but initially forcing``xmax-xmin = ymax-ymin``. ======== ==========================================================

emit : bool, optional, default True
Whether observers are notified of the axis limit change.
This option is passed on to ~.Axes.set_xlim and
~.Axes.set_ylim.

Returns

xmin, xmax, ymin, ymax : float
The axis limits.

See also

matplotlib.axes.Axes.set_xlim
matplotlib.axes.Axes.set_ylim
File: c:\users\huawei\appdata\local\programs\python\python36\lib\site-packages\matplotlib\pyplot.py
Type: function

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