MATLAB计算整数的长度

Question

我正在尝试计算整数的长度.

例如:

a = 1.1234; b = 33; c = 100; d = -222;
e = lengthint([a,b,c,d])

预期产量:

e =  1    2    3    3

我试过用这个:

e = max(ceil(log10(abs([a,b,c,d]))),1)

但这是输出:

e =  1    2    2    3

所以数字的问题是10的倍数.

Answer 1

你可以这样做 -

A = [a,b,c,d]
lens = floor(log10(abs(A)))+1
lens(lens<0) = 0 %// Assuming that 0.xx numbers to have zero lengths

样品运行:

情况1:

>> A = [0.00001234, 1.1234, 33, 10,  -222];
>> lens = floor(log10(abs(A)))+1;
>> lens(lens<0) = 0
lens =
     0     1     2     2     3

案例#2:

>> A = [-0.00001234, 1.1234 33, 10,  -222, 0];
>> lens = floor(log10(abs(A)))+1;
>> lens(lens<0) = 0
lens =
     0     1     2     2     3     0