最近在使用matplotlib,把我自己遇到过的问题总结一下叭~
fig = plt.figure(figsize=(30,15))
我要画的是3行,1列共三个图
第一个子图(双y轴子图)
host = fig.add_subplot(311) #311表示3行1列里的第一个图
host.set_title(title)
host.set_xlabel("timestamp",fontsize =12)
host.set_ylabel("totle asset",fontsize =12)
如果第一个图是 双y轴,则:
par = host.twinx()
par.set_ylabel("cur Price",fontsize =12) #设置x、y标签的操作和主轴一样
第二个子图
ax2 = fig.add_subplot(312)
ax2.set_xlabel("timestamp",fontsize =12)
ax2.set_ylabel("amount",fontsize =12)
第三个子图
ax3 = fig.add_subplot(313)
ax3.set_xlabel("timestamp",fontsize =12)
ax3.set_ylabel("amount",fontsize =12)
par_3 = ax3.twinx()
par_3.set_ylabel("transaction Price",fontsize =12)
asset_line_1, = host.plot(x,y1,label='asset_line')
price_line_1, = par.plot(x,y2, color='red',label='price_line')
host.legend(handles=[asset_line_1,price_line_1], labels=['asset_line','price_line'], loc=2)
amount_line_2, = ax2.plot(x,amount,'co-',label='amount_line')
asset_line_3, = ax3.plot(timestamp_3,asset_list_3,label='asset_line')
amount_line_3, = ax3.plot(timestamp_3,amount_3,'co-',label='amount_line')
price_line_3, = par_3.plot(timestamp_3,price_3, color='red',label='price_line')
host.legend(handles=[asset_line_1,price_line_1], labels=['asset_line','price_line'], loc=2)
ax3.legend(handles=[asset_line_3, amount_line_3,price_line_3], labels=['asset_line','amount_line','price_line'], loc=2)
for xtick in ax3.get_xticklabels():
xtick.set_rotation(-45)
host.xaxis.set_major_locator(plt.MultipleLocator(10))
ax2.xaxis.set_major_locator(plt.MultipleLocator(10))
plt.tight_layout()#紧凑布局
host.grid(which='major',axis="both",linewidth=0.75,linestyle='-',color='orange')
host.grid(which='minor',axis="both",linewidth=0.25,linestyle='-',color='orange')
ax3.grid(which='major',axis="both",linewidth=0.75,linestyle='-',color='orange')
ax3.grid(which='minor',axis="both",linewidth=0.25,linestyle='-',color='orange')
设置数字标签
for a, b in zip(x, y1):
host.text(a, b, "%.5f" % b, ha='center', va='bottom', fontsize=10)
for a, b in zip(x, y2):
par.text(a, b, "%.5f" % b, ha='center', va='bottom', fontsize=10)
for a, b in zip(x, amount):
host.text(a, b, b, ha='center', va='bottom', fontsize=10)
plt.savefig(output_name)
#图片窗口
fig = plt.figure(figsize=(30,15))
host = fig.add_subplot(311)
host.set_title(title)
host.set_xlabel("timestamp",fontsize =12)
host.set_ylabel("totle asset",fontsize =12)
par = host.twinx()
par.set_ylabel("cur Price",fontsize =12)
ax2 = fig.add_subplot(312)
ax2.set_xlabel("timestamp",fontsize =12)
ax2.set_ylabel("amount",fontsize =12)
ax3 = fig.add_subplot(313)
ax3.set_xlabel("timestamp",fontsize =12)
ax3.set_ylabel("amount",fontsize =12)
par_3 = ax3.twinx()
par_3.set_ylabel("transaction Price",fontsize =12)
#画线
asset_line_1, = host.plot(x,y1,label='asset_line')
price_line_1, = par.plot(x,y2, color='red',label='price_line')
host.legend(handles=[asset_line_1,price_line_1], labels=['asset_line','price_line'], loc=2)
amount_line_2, = ax2.plot(x,amount,'co-',label='amount_line')
asset_line_3, = ax3.plot(timestamp_3,asset_list_3,label='asset_line')
amount_line_3, = ax3.plot(timestamp_3,amount_3,'co-',label='amount_line')
price_line_3, = par_3.plot(timestamp_3,price_3, color='red',label='price_line')
ax3.legend(handles=[asset_line_3, amount_line_3,price_line_3], labels=['asset_line','amount_line','price_line'], loc=2)
# #设置坐标轴
# host.set_xticklabels(labels=trade_date, fontsize=10,rotation=-90)
for xtick in ax3.get_xticklabels():
xtick.set_rotation(-45)
#画网格
# ax = plt.gca()
host.xaxis.set_major_locator(plt.MultipleLocator(10))
ax2.xaxis.set_major_locator(plt.MultipleLocator(10))
# ax.xaxis.set_major_locator(ticker.MultipleLocator(2))
# ax.xaxis.set_minor_locator(plt.MultipleLocator(.1))
# ax.yaxis.set_major_locator(plt.MultipleLocator(1.0))
# ax.yaxis.set_minor_locator(plt.MultipleLocator(.1))
plt.tight_layout()#紧凑布局
host.grid(which='major',axis="both",linewidth=0.75,linestyle='-',color='orange')
host.grid(which='minor',axis="both",linewidth=0.25,linestyle='-',color='orange')
ax3.grid(which='major',axis="both",linewidth=0.75,linestyle='-',color='orange')
ax3.grid(which='minor',axis="both",linewidth=0.25,linestyle='-',color='orange')
# # 设置数字标签
# for a, b in zip(x, y1):
# host.text(a, b, "%.5f" % b, ha='center', va='bottom', fontsize=10)
# for a, b in zip(x, y2):
# par.text(a, b, "%.5f" % b, ha='center', va='bottom', fontsize=10)
# for a, b in zip(x, amount):
# host.text(a, b, b, ha='center', va='bottom', fontsize=10)
# a = ScrollableWindow(fig)
plt.savefig(output_name)