how to change a number of base n to base m

i want to write a code that changes the base b of a number

for example :

124 can be written as 01444 in base of 5

112 can be written as 01300 in base of 4

the input should be a numbe x in decimal base and a new base b

the output should be the number x in base b

Answer 1

[the cyclist]

John D'Errico created the base2base function to do exactly this. Follow that link to the File Exchange.

>> base2base('124',10,5)

ans =

    '444'

(I think you got your example wrong.)

Answer 2

[Bruno Luong]

>> dec2base(124,5)

ans =

    '444'

>> dec2base(122,4)

ans =

    '1322'

>> base2dec('1444',5)

ans =

   249

>> base2dec('1300',4)

ans =

   112

>> dec2base(base2dec('1300',4),5) % convert 1300 in base 4 to base 5

ans =

    '422'

>>