Dimension Reduction In MNIST,a digit is 28 x 28 dims. Most 28 x 28 dim vectors are not digits 3 333 -20°-10° 0°10°20°Dimension Reduction • In MNIST, a digit is 28 x 28 dims. • Most 28 x 28 dim vectors are not digits 3 -20。 -10。 0。 10。 20