如何使用 matplotlib 在 dataframe 中的两点之间画线？

Question

I'm trying to compare my predicted output and the test data using matplotlib.As I'm new to python I'm not able to find how to connect each entry with line like in this photo . I was able to write a code like this which compares the Y coordinate and entries but I'm unable to map each entry of test data with predicted output with a line

X_1 = range(len(Y_test))
plt.figure(figsize=(5,5))
plt.scatter(X_1, output, label='Y_output',alpha=0.3)
plt.scatter(X_1, Y_test, label='Y_test',alpha=0.3)
plt.title("Scatter Plot")
plt.legend()
plt.xlabel("entries")
plt.ylabel("Y value")
plt.show()

graph we are getting

Answer 1

Try something like this in addition to your code

plt.plot(np.stack((X_1,X_1)), np.stack((output,Y_test)), color="black")

In fact, to reproduce the plot you want, you need different x for output and for Y_test (for example, X_1 and X_2 that are different).