basics of matplotlib

良いまとめ

http://w.livedoor.jp/met-python/d/matplotlib#content_5_13

グラフの種類

http://turbare.net/transl/scipy-lecture-notes/intro/matplotlib/matplotlib.html#setting-tick-labels

mathematical expression (incl. Greek charachters)

http://matplotlib.org/users/mathtext.html

save PDF (with high resolution)

http://nanyakan.blogspot.com/2013/02/matplotlib.html

color

http://d.hatena.ne.jp/natsutan/20110714/1310625074

format etc.

label name

plt.xlabel("Features", fontsize=18)
plt.ylabel("Weight", fontsize=18)

plot format

plt.plot(x, y1, color='red', label='Training', linewidth=2.5)
plt.plot(x, y2, color='blue', label='Test', linewidth=2.5)

axis range (min, max)

plt.xlim(xmax=len(Y))
plt.ylim(ymin=-0.5)

rename tick names

tick_lcs = np.array([0, 500, 1000])
tick_lbs = np.array(['13000', '13500', '14000'])
plt.xticks(tick_lcs, tick_lbs)

save pdf

plt.savefig(sys.argv[1]+".pdf", format = 'pdf')

legend

http://matplotlib.org/users/legend_guide.html
http://d.hatena.ne.jp/yosshi71jp/20100426/1272301223

xticksのrotation

plt.setp(plt.xticks()[1], rotation=30)

棒グラフ等で、左右に余白を取る

plt.xlim([min(xdata) - 0.5, max(xdata) + 0.5])

error-bar

plt.errorbar(x, y, yerr=error, fmt='.-')

hierarchical clustering

http://nbviewer.ipython.org/github/herrfz/dataanalysis/blob/master/week3/hierarchical_clustering.ipynb
http://stackoverflow.com/questions/11917779/how-to-plot-and-annotate-hierarchical-clustering-dendrograms-in-scipy-matplotlib
http://docs.scipy.org/doc/scipy/reference/generated/scipy.cluster.hierarchy.dendrogram.html

for loop等で、複数のグラフを出力する時に、pltをクリアする

plt.clf()
http://stackoverflow.com/questions/8213522/when-to-use-cla-clf-or-close-for-clearing-a-plot-in-matplotlib

グラフの枠線オン＆オフ

http://qiita.com/irs/items/fe909442be057f0efb48

scatter plot でx軸までの垂線を引きたい場合

stem(x,y)
http://stackoverflow.com/questions/21192576/matplotlib-vertical-lines-in-scatter-plot

transparency

e.g., alpha(0.3)