学习笔记211—plt.scatter.cmap的多种选择【Python中，colorBar颜色系的多种选择】

python设置scatter颜色渐变

参考代码如下：

<span style="font-size:18px;">import matplotlib.pyplot as plt
cm = plt.cm.get_cmap('RdYlBu')
xy = range(20)
z = xy
sc = plt.scatter(xy, xy, c=z, vmin=0, vmax=20, s=35, cmap=cm)
plt.colorbar(sc)
plt.show()</span>

其中get_cmap中取值可为：Possible values are: Accent, Accent_r, Blues, Blues_r, BrBG, BrBG_r, BuGn, BuGn_r, BuPu, BuPu_r, CMRmap, CMRmap_r, Dark2, Dark2_r, GnBu, GnBu_r, Greens, Greens_r, Greys, Greys_r, OrRd, OrRd_r, Oranges, Oranges_r, PRGn, PRGn_r, Paired, Paired_r, Pastel1, Pastel1_r, Pastel2, Pastel2_r, PiYG, PiYG_r, PuBu, PuBuGn, PuBuGn_r, PuBu_r, PuOr, PuOr_r, PuRd, PuRd_r, Purples, Purples_r, RdBu, RdBu_r, RdGy, RdGy_r, RdPu, RdPu_r, RdYlBu, RdYlBu_r, RdYlGn, RdYlGn_r, Reds, Reds_r, Set1, Set1_r, Set2, Set2_r, Set3, Set3_r, Spectral, Spectral_r, Wistia, Wistia_r, YlGn, YlGnBu, YlGnBu_r, YlGn_r, YlOrBr, YlOrBr_r, YlOrRd, YlOrRd_r...其中末尾加r是颜色取反。

或者Colormap 中取值可为： Accent, Accent_r, Blues, Blues_r, BrBG, BrBG_r, BuGn, BuGn_r, BuPu, BuPu_r, CMRmap, CMRmap_r, Dark2, Dark2_r, GnBu, GnBu_r, Greens, Greens_r, Greys, Greys_r, OrRd, OrRd_r, Oranges, Oranges_r, PRGn, PRGn_r, Paired, Paired_r, Pastel1, Pastel1_r, Pastel2, Pastel2_r, PiYG, PiYG_r, PuBu, PuBuGn, PuBuGn_r, PuBu_r, PuOr, PuOr_r, PuRd, PuRd_r, Purples, Purples_r, RdBu, RdBu_r, RdGy, RdGy_r, RdPu, RdPu_r, RdYlBu, RdYlBu_r, RdYlGn, RdYlGn_r, Reds, Reds_r, Set1, Set1_r, Set2, Set2_r, Set3, Set3_r, Spectral, Spectral_r, Wistia, Wistia_r, YlGn, YlGnBu, YlGnBu_r, YlGn_r, YlOrBr, YlOrBr_r, YlOrRd, YlOrRd_r, afmhot, afmhot_r, autumn, autumn_r, binary, binary_r, black_blue, black_blue_r, black_green, black_green_r, black_pink, black_pink_r, black_purple, black_purple_r, black_red, black_red_r, blue_orange, blue_orange_r, blue_red, blue_red_r, blue_transparent, blue_transparent_full_alpha_range, bone, bone_r, brg, brg_r, brown_blue, brown_blue_r, brown_cyan, brown_cyan_r, bwr, bwr_r, cividis, cividis_r, cold_hot, cold_hot_r, cold_white_hot, cold_white_hot_r, cool, cool_r, coolwarm, coolwarm_r, copper, copper_r, cubehelix, cubehelix_r, cyan_copper, cyan_copper_r, cyan_orange, cyan_orange_r, flag, flag_r, gist_earth, gist_earth_r, gist_gray, gist_gray_r, gist_heat, gist_heat_r, gist_ncar, gist_ncar_r, gist_rainbow, gist_rainbow_r, gist_stern, gist_stern_r, gist_yarg, gist_yarg_r, gnuplot, gnuplot2, gnuplot2_r, gnuplot_r, gray, gray_r, green_transparent, green_transparent_full_alpha_range, hot, hot_black_bone, hot_black_bone_r, hot_r, hot_white_bone, hot_white_bone_r, hsv, hsv_r, inferno, inferno_r, jet, jet_r, magma, magma_r, nipy_spectral, nipy_spectral_r, ocean, ocean_hot, ocean_hot_r, ocean_r, pink, pink_r, plasma, plasma_r, prism, prism_r, purple_blue, purple_blue_r, purple_green, purple_green_r, rainbow, rainbow_r, red_transparent, red_transparent_full_alpha_range, roy_big_bl, seismic, seismic_r, spring, spring_r, summer, summer_r, tab10, tab10_r, tab20, tab20_r, tab20b, tab20b_r, tab20c, tab20c_r, terrain, terrain_r, twilight, twilight_r, twilight_shifted, twilight_shifted_r, videen_style, viridis, viridis_r, winter, winter_r，其中末尾加r是颜色取反。

参考连接：

​​https://medium.com/@morganjonesartist/color-guide-to-seaborn-palettes-da849406d44f​​

​​https://matplotlib.org/stable/gallery/color/colormap_reference.html​​

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