My experience is primarily in nuclear, but I made a quick (i.e. crude) sketch of how I've typically seen class change designations on PIDs. In my example, the class change is at the flange of the valve with a format how LittleInch described.
I am fairly new to matlab, and I have written some code to process some image data. My code works fine, except one of the early steps takes an extremely long time to compute. I have a 3 column matrix with approximately 1.4 million rows and I am performing the following code on that matrix...
