The MNIST training and testing datasets as plain UTF-8 text files.
Each line contains comma separated values representing the image label (0 -9) followed by the pixels grey values (0 - 255).
More precisely, a line contains 1 label value, 784 pixel values, 784 commas and one line break.
The pixel values are organized in the exact same way as the raw idx files (i.e. row-wise; top to bottom...)
Label,pixel(1,1),pixel(1,2), . . . ,pixel(24,24)