How to create a variable representing the max length of consecutively same numbers in a row?

[Victor Smith]

I am trying to find a way to caculate the max length of consectively same numbers in each row . For example, let's look at the data below

clear all
input str1(id) byte(a1) byte(b2) byte(c1) byte(f4) byte(m1) byte(m2) byte(t3)
a 2 2 2 2 3 3 3
b 5 5 1 2 3 4 5
c 1 1 1 1 1 1 1
d 5 4 5 6 4 5 3
e 1 1 2 2 2 2 1
f 7 7 7 1 1 1 1
g 2 2 2 2 2 2 1
h 3 3 3 1 1 1 2
end

I would like to generate a variable called 'maxlength'. Idealy, it would be like the following.

id    a1    b2    c1    f4    m1    m2    t3    maxlength
a    2    2    2    2    3    3    3    4
b    5    5    1    2    3    4    5    2
c    1    1    1    1    1    1    1    7
d    5    4    5    6    4    5    3    1
e    1    1    2    2    2    2    1    4
f    7    7    7    1    1    1    1    4
g    2    2    2    2    2    2    1    6
h    3    3    3    1    1    1    2    3

Could we do so in Stata?

[Nick Cox]

Duplicate post. If interested, please follow https://www.statalist.org/forums/for...mbers-in-a-row