How do I format the following numbers that are in vector?
For an instance, numbers which I have:
23.02567
0.025679
and I would like to format to this:
0.230256700+E02
0.025679000+E00
First, note that this is not the proper way to format numbers in scientific- or engineering-notation. Those numbers should always have exactly one digit in front of the decimal point, unless the exponent is required to be a multiple of 3 (i.e. a power of 1000, corresponding to one of the SI prefixes). If, however, you have to use this format, you could write your own format string for that.
>>> x, e = 23.02567, 2
>>> "%f%sE%02d" % (x/10**e, "+" if e >= 0 else "-", abs(e))
'0.230257+E02'
>>> x, e = 0.025679, -1
>>> "%f%sE%02d" % (x/10**e, "+" if e >= 0 else "-", abs(e))
'0.256790-E01'
This is assuming that the exponent, e, is given. If the exponent does not matter, you could also use the proper %E format and just replace E+ with +E:
>>> ("%E" % x).replace("E+", "+E").replace("E-", "-E")
'2.567900-E02'