Problem 45818. Extract leading non-zero digit (★★★★★)

(Copy of Problem 47)
Benford's Law states that the distribution of leading digits is not random. This is probably because many things grow logarithmically. Extract the leading digit from these vectors.
10 --> 1
13 --> 1
0.3 --> 3
-4 --> 4
-5 --> 5
-0.006 --> 6
Input will be a vector
x = [1 0.3 -2 0.001 -0.0006, 582398, 3020];
Output should be
y = [1 3 2 1 6 5 3];
Avoid using for/while loops.
Solve

Solution Stats

31.18% Correct | 68.82% Incorrect
Last Solution submitted on Dec 30, 2025

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