<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def plot_bcr(fignum, Bcr1, Bcr2):
 """ function to plot two estimates of Bcr against each other """

    plt.figure(num=fignum)
    plt.plot(Bcr1, Bcr2, 'ro')
    plt.xlabel('Bcr1')
    plt.ylabel('Bcr2')
    plt.title('Compare coercivity of remanence')