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.
Solution Stats
Problem Comments
Solution Comments
Show commentsProblem Recent Solvers28
Suggested Problems
-
Find all elements less than 0 or greater than 10 and replace them with NaN
15467 Solvers
-
6644 Solvers
-
346 Solvers
-
Vector of numbers divisible by 3
145 Solvers
-
537 Solvers
More from this Author52
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!