matlab - How does sprintf('%d',A) - '0' work? -


i looking way separate digits of array in matlab i.e. if a = 1024 a = [1, 0, 2, 4].

i searched on net , found code (also posted on title):

sprintf('%d',a) - '0'

which converted [1024] -> [1, 0, 2, 4].

it did solve problem did not understand it, - '0' part. can please explain how works?

also if write sprintf('%d',a) + '0' (for a = [1024]) in matlab command window showed following:

 97 96 98 100

this puzzled me more can explain this?

it takes advantage of automatic casting char array double array when - operator used. remember each character has ascii value if type double('0') in command line , you'll see 48 answer. while double('1024') gives you

ans =     49   48   50   52

sprintf('%d', a) convert integer string (i.e. char array). minus casts both sides double end with

double('1024') - double('0')

which is

[49, 48, 50, 52] - [48]

which ends [1,0,2,4]

from here should clear why adding '0' resulted in [97, 96, 98, 100]


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