[ML]이미지
The images are converted into 28 by 28 pixels, 784 pixels. And for each pixel, we obtain a grayscale intensity between 0, that's white, and 255, that's black. And then there's gray in the middle. For each digitized image i we have categorical outcomes Yi, which can be one of 10 values, 0, 1, 2, 3 up to 9, and features Xi1 all the way up to Xi784. We can use boldface to distinguish the vector of ..