A secondary carbocation is one in which there. are two carbons attached to the carbon bearing the positive charge. Likewise, a tertiary. carbocation is one in which there are three carbons attached to the carbon bearing the. positive charge. Methyl carbocations. No CâC+ bonds.
Numeric keypad. A numeric keypad, number pad, numpad, or ten key, is the palm-sized, 17-key section of a standard computer keyboard, usually on the far right.It provides calculator-style efficiency for entering numbers.he arrangement of digits on numeric keypads with the 7-8-9 keys two rows above the 1-2-3 keys is derived from calculators and cash registers. It is notably different from the layout of telephone Touch-Tone keypads which have the 1-2-3 keys on top and 7-8-9 keys on the third row.
def nanmean(data, **args): return numpy.ma.filled(numpy.ma.masked_array(data,numpy.isnan(data)).mean(**args), fill_value=numpy.nan) Example use: data = [[0, 1, numpy.nan], [8, 5, 1]] data = numpy.array(data) print data print nanmean(data) print nanmean(data, axis=0) print nanmean(data, axis=1) Will print out: [[ 0. 1. nan] [ 8. 5. 1.]] 3.0 [ 4.