code: def analyze(context=None, results=None):
      ax1 = plt.subplot(211)
      idx = pd.IndexSlice
      df = (
          context.github.loc[START:END]
          .loc[idx[:, [b"ZEC"]], ["commits"]]
          .reset_index(level="symbol", drop=True)
      )
      df.plot(ax=ax1, color="blue")
      ax1.legend(loc=2)
      ax1.set_title("Zcash")
      ax2 = ax1.twinx()
      context.zec["price"].loc[START:END].plot(ax=ax2, color="green")
      ax2.legend(loc=1)
  
      ax3 = plt.subplot(212)
      idx = pd.IndexSlice
      df = (
          context.github.loc[START:END]
          .loc[idx[:, [b"XMR"]], ["commits"]]
          .reset_index(level="symbol", drop=True)
      )
      df.plot(ax=ax3, color="blue")
      ax3.legend(loc=2)
      ax3.set_title("Monero")
      ax4 = ax3.twinx()
      context.xmr["price"].loc[START:END].plot(ax=ax4, color="green")
      ax4.legend(loc=1)
  
      plt.show()
  
imports: import pandas
  import matplotlib.pyplot
  from catalyst import run_algorithm
  from catalyst.api import symbol, get_dataset
label_desc: Use image node_id 3 for calling a global function with example usage: analyze(context, results) without return types