other:python:matplotlib_by_jyp
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other:python:matplotlib_by_jyp [2021/02/26 11:56] jypeter More link updates |
other:python:matplotlib_by_jyp [2021/06/16 14:42] jypeter [Useful matplotlib reference pages] updates in the colors' section |
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| * [[https://stackoverflow.com/questions/35479508/cartopy-set-xlabel-set-ylabel-not-ticklabels|Trick source]] | * [[https://stackoverflow.com/questions/35479508/cartopy-set-xlabel-set-ylabel-not-ticklabels|Trick source]] | ||
| * Trick needs to be used with ''cartopy 0.17.0''\\ Remember to update/remove this information in the future | * Trick needs to be used with ''cartopy 0.17.0''\\ Remember to update/remove this information in the future | ||
| - | * Major (and minor) **tick marks location**: ''my_plot.set_xticks(x_ticks_values, minor=False)'' | + | * Major (and minor) **tick marks location**: ''my_plot.set_xticks(x_ticks_values, minor=False)'' ([[https://matplotlib.org/stable/api/_as_gen/matplotlib.axes.Axes.set_xticks.html|set_xticks]]) |
| * Use an empty list if you don't want tick marks: ''my_plot.set_xticks([])'' | * Use an empty list if you don't want tick marks: ''my_plot.set_xticks([])'' | ||
| - | * **Tick labels** (if you don't want the default values): ''my_plot.set_xticklabels(x_ticks_labels, minor=False, fontsize=ticklabels_fontsize)'' | + | * **Tick labels**: ''my_plot.set_xticklabels(x_tick_labels, minor=False, fontsize=ticklabels_fontsize)'' ([[https://matplotlib.org/stable/api/_as_gen/matplotlib.axes.Axes.set_xticklabels.html|set_xticklabels]]) |
| - | * ''x_ticks_labels'' is a list of strings that has the same length as ''x_ticks_values''. Use an empty string in the positions where you don't want a label | + | * If you do not specify labels, the //default labels// will just be the values specifying the ticks' location |
| + | * ''x_tick_labels'' is a list of strings that has the same length as ''x_ticks_values''.\\ Use an empty string in the positions where you don't want a label | ||
| + | * The default numerical labels may be too long, due to numerical approximations. You can try to explicitly round the values, or generate correct label strings from the values\\ <code>>>> x_tick_values = np.arange(0, 1, 0.2) | ||
| + | >>> x_tick_values.tolist() | ||
| + | [0.0, 0.2, 0.4, 0.6000000000000001, 0.8] | ||
| + | >>> x_tick_values.round(decimals=1).tolist() | ||
| + | [0.0, 0.2, 0.4, 0.6, 0.8] | ||
| + | >>> x_tick_labels = [ '%.1f' % (t_val,) for t_val in x_tick_values ] | ||
| + | >>> x_tick_labels | ||
| + | ['0.0', '0.2', '0.4', '0.6', '0.8'] | ||
| + | >>> x_tick_labels[0] = 'START' | ||
| + | >>> x_tick_labels[-1] = 'END' | ||
| + | >>> x_tick_labels | ||
| + | ['START', '0.2', '0.4', '0.6', 'END'] | ||
| + | </code> | ||
| + | * You can also use fancy [[https://matplotlib.org/stable/gallery/ticks_and_spines/tick-formatters.html|tick formatters]] | ||
| * Many more options for ticks, labels, orientation, ... | * Many more options for ticks, labels, orientation, ... | ||
| * **Grid lines**: | * **Grid lines**: | ||
| Line 143: | Line 158: | ||
| * [[https://matplotlib.org/api/_as_gen/matplotlib.pyplot.plot.html|plot(...)]]: //fmt// (see documentation) or ''marker'' and ''markerfacecolor''/''mfc'' (and ''markerfacecoloralt''/''mfcalt'' for dual color markers), ''markersize'', ''markeredgewidth''/''mew'', ''markeredgecolor'' (use ''markeredgecolor='none''' if you don't want to plot the edge of the markers), ''fillstyle'' (''full'', ''None'', [[https://matplotlib.org/stable/gallery/lines_bars_and_markers/marker_reference.htm|other]]) | * [[https://matplotlib.org/api/_as_gen/matplotlib.pyplot.plot.html|plot(...)]]: //fmt// (see documentation) or ''marker'' and ''markerfacecolor''/''mfc'' (and ''markerfacecoloralt''/''mfcalt'' for dual color markers), ''markersize'', ''markeredgewidth''/''mew'', ''markeredgecolor'' (use ''markeredgecolor='none''' if you don't want to plot the edge of the markers), ''fillstyle'' (''full'', ''None'', [[https://matplotlib.org/stable/gallery/lines_bars_and_markers/marker_reference.htm|other]]) | ||
| * [[https://matplotlib.org/api/_as_gen/matplotlib.pyplot.scatter.html|scatter(...)]]: ''marker'' (marker type), ''c'' (color), ''s'' (size), ''linewidths'' (linewidth of the marker edges), ''edgecolors'' | * [[https://matplotlib.org/api/_as_gen/matplotlib.pyplot.scatter.html|scatter(...)]]: ''marker'' (marker type), ''c'' (color), ''s'' (size), ''linewidths'' (linewidth of the marker edges), ''edgecolors'' | ||
| - | * [[https://matplotlib.org/api/colors_api.html|colors]] and colormaps | + | * [[https://matplotlib.org/stable/api/colors_api.html|colors]] and colormaps |
| * [[https://matplotlib.org/stable/gallery/color/color_demo.html|color demo]] | * [[https://matplotlib.org/stable/gallery/color/color_demo.html|color demo]] | ||
| - | * [[https://matplotlib.org/examples/color/named_colors.html|named colors]] | + | * [[https://matplotlib.org/stable/gallery/color/named_colors.html#sphx-glr-gallery-color-named-colors-py|named colors]] |
| + | * [[https://www.w3schools.com/colors/colors_picker.asp|HTML color picker]] and different ways of choosing colors | ||
| * Reverting the colors: add ''_r'' at the end of the colormap name | * Reverting the colors: add ''_r'' at the end of the colormap name | ||
| * Number of colors in the //my_cmap// colormap (usually 256): ''my_cmap.N'' | * Number of colors in the //my_cmap// colormap (usually 256): ''my_cmap.N'' | ||
other/python/matplotlib_by_jyp.txt · Last modified: 2023/10/26 08:39 by jypeter
