131 lines
3.9 KiB
Markdown
131 lines
3.9 KiB
Markdown
# subplot
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{:.no_toc}
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<nav markdown="1" class="toc-class">
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* TOC
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{:toc}
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</nav>
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## The goal
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Questions to [David Rotermund](mailto:davrot@uni-bremen.de)
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## [matplotlib.pyplot.subplot](https://matplotlib.org/stable/api/_as_gen/matplotlib.pyplot.subplot.html)
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```python
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matplotlib.pyplot.subplot(*args, **kwargs)
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```
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> Add an Axes to the current figure or retrieve an existing Axes.
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>
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> This is a wrapper of Figure.add_subplot which provides additional behavior when working with the implicit API (see the notes section).
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> ***args** : int, (int, int, index), or SubplotSpec, default: (1, 1, 1)
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>
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> The position of the subplot described by one of
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> * Three integers (nrows, ncols, index). The subplot will take the index position on a grid with nrows rows and ncols columns. index starts at 1 in the upper left corner and increases to the right. index can also be a two-tuple specifying the (first, last) indices (1-based, and including last) of the subplot, e.g., fig.add_subplot(3, 1, (1, 2)) makes a subplot that spans the upper 2/3 of the figure.
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> * A 3-digit integer. The digits are interpreted as if given separately as three single-digit integers, i.e. fig.add_subplot(235) is the same as fig.add_subplot(2, 3, 5). Note that this can only be used if there are no more than 9 subplots.
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```python
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import numpy as np
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import matplotlib.pyplot as plt
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rng = np.random.default_rng()
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plt.figure(1)
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plt.subplot(2, 2, 1)
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plt.imshow(rng.random((10, 100)))
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plt.title("A")
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plt.subplot(2, 2, 2)
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plt.imshow(rng.random((5, 10)))
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plt.title("B")
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plt.subplot(2, 2, 3)
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plt.imshow(rng.random((50, 20)))
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plt.title("C")
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plt.subplot(2, 2, 4)
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plt.imshow(rng.random((100, 200)))
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plt.title("D")
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plt.show()
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```
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## [matplotlib.pyplot.subplots_adjust](https://matplotlib.org/stable/api/_as_gen/matplotlib.pyplot.subplots_adjust.html)
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```python
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matplotlib.pyplot.subplots_adjust(left=None, bottom=None, right=None, top=None, wspace=None, hspace=None)
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```
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> Adjust the subplot layout parameters.
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>
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> Unset parameters are left unmodified; initial values are given by **rcParams["figure.subplot.[name]"]**.
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>
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> **left** : float, optional
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>
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> The position of the left edge of the subplots, as a fraction of the figure width.
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>
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> **right** : float, optional
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>
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> The position of the right edge of the subplots, as a fraction of the figure width.
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>
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> **bottom** : float, optional
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>
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> The position of the bottom edge of the subplots, as a fraction of the figure height.
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>
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> **top** : float, optional
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>
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> The position of the top edge of the subplots, as a fraction of the figure height.
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>
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> **wspace** : float, optional
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>
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> The width of the padding between subplots, as a fraction of the average Axes width.
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>
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> **hspace** : float, optional
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>
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> The height of the padding between subplots, as a fraction of the average Axes height.
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The parameter meanings (and suggested defaults) are:
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```python
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left = 0.125 # the left side of the subplots of the figure
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right = 0.9 # the right side of the subplots of the figure
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bottom = 0.1 # the bottom of the subplots of the figure
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top = 0.9 # the top of the subplots of the figure
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wspace = 0.2 # the amount of width reserved for space between subplots,
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# expressed as a fraction of the average axis width
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hspace = 0.2 # the amount of height reserved for space between subplots,
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# expressed as a fraction of the average axis height
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```
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```python
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import numpy as np
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import matplotlib.pyplot as plt
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rng = np.random.default_rng()
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plt.figure(1)
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plt.subplot(2, 2, 1)
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plt.imshow(rng.random((10, 10)))
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plt.title("A")
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plt.subplot(2, 2, 2)
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plt.imshow(rng.random((10, 10)))
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plt.title("B")
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plt.subplot(2, 2, 3)
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plt.imshow(rng.random((10, 10)))
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plt.title("C")
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plt.subplot(2, 2, 4)
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plt.imshow(rng.random((10, 10)))
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plt.title("D")
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plt.subplots_adjust(left=0.01, right=1.0, bottom=0.1, top=1.0, wspace=-0.5, hspace=0.4)
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plt.show()
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```
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