Extract leading non-zero digit (★★★★★) - MATLAB Cody - MATLAB Central

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

Difficulty:
(149)
Rate
(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

30.43% Correct | 69.57% Incorrect
Last Solution submitted on Apr 18, 2024

Problem Comments

Solution Comments

Show comments
Registration Now Open for MathWorks AUTOMOTIVE CONFERENCE 2025
...
Hello Community, We're excited to announce that registration is now open for the...

Problem Recent Solvers28

Suggested Problems

More from this Author52

Problem Tags

in-built functions

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!
Go to top of page