你可以使用dec2base函数
dec2base(你的数，进制，位数)
DEC2BASE(D,B) returns the representation of D as a string in
base B. D must be a non-negative integer array smaller than 2^52
and B must be an integer between 2 and 36.
DEC2BASE(D,B,N) produces a representation with at least N digits.
例如
dec2base(12,2,8)
ans =
00001100
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