grid_data = d.iloc [index] .as_matrix () .reshape (28,28) tidak berfungsi

# display or plot a number.
plt.figure(figsize=(7,7))
idx = 100

grid_data = d.iloc[idx].as_matrix().reshape(28,28) # reshape from 1d to 2d pixel array
plt.imshow(grid_data, interpolation = "none", cmap = "gray")
plt.show()

print(l[idx])
Wide-eyed Warbler