IIRC the MINST data has a mix of style of 4's. I tried it with an open top, and it worked correctly. I wondering if they just happened to sample a majority of 4

IIRC the MINST data has a mix of style of 4's. I tried it with an open top, and it worked correctly. I wondering if they just happened to sample a majority of 4s that have an open top. Example: http://imgur.com/mRRz1L3 http://imgur.com/mRRz1L3