1. A method for storing feature vectors in a memory, the method comprising: generating a first feature vector having a plurality of attributes with each attribute of its plurality of attributes having a respective value; generating a second feature vector having a plurality of attributes with each attribute of its plurality of attributes having a respective value; programming a string of memory cells of the memory to store at least one attribute of the first feature vector and to store at least one attribute of the second feature vector; programming the string of memory cells of the memory to store do not care data as at least a portion of the respective value of an attribute of the first feature vector; wherein each memory cell of the string of memory cells has a control gate coupled to a different access line; and wherein programming the string of memory cells to store do not care data for a digit of the attribute of the first feature vector comprises programming a pair of memory cells of the string of memory cells to threshold voltages such that at least one memory cell of the pair of memory cells will not conduct in response to applying respective voltages to the control gates of the pair of memory cells through their respective access lines during a reading of the digit of the attribute of the first feature vector by the memory.