python常用命令

PM2.5的表示方法

'PM$_2$$_.$$_5$(μg m$^-$$^3$)'

获取array的index，然后进行替换

ws[np.argwhere((wd<90) | (wd >270))]=np.nan   ##挑出非南风，赋值为np.nan

画双y轴坐标，并设置tick的属性

axs0 = axs[0].twinx() 
line1=axs0.plot(xs,Temp,color=c,ls=ls,lw=0.8)
axs0.set_ylabel('T($^\circ$C)', color=c)  # we already handled the x-label with ax1
axs0.set_ylim(10,40)
axs0.tick_params(axis='y', labelcolor=c,color=c)

把图的上轴线和右轴线隐掉

for spine in ["top", "bottom"]:
    axs0.spines[spine].set_visible(False)
## axs0.spines[spine].set_color('None')