Python 索引错误：数组的索引太多

Question

I am trying to code a plot with this code:

         for k in range(5):   
            plt.scatter(np.arange(0,200),cprofit[:,k],label = marketshare)
         a = pd.Series([np.mean(cprofit[:,k]), np.std(cprofit[:,k]), np.max(cprofit[:,k]), np.min(cprofit[:,k])], index=df.columns)
         df = df.append(a,ignore_index=True)

The error:

a = pd.Series([np.mean(cprofit[:,k]), np.std(cprofit[:,k]), np.max(cpro fit[:,k]), np.min(cprofit[:,k])], index=df.columns)

IndexError: too many indices for array: array is 1-dimensional,  but 2 were indexed

for line

can someone explain what could be wrong??

Answer 1

The two inputs of plt.scatter() should be of the same dimension, and size. You have numpy.arange(0, 200) creating a 1-dimensional array of size 200, and it's unclear what cprofit[:,k] is doing, but it seems to be slicing a large 2-D array, which may or may not produce a 1-D array of size 200.