Problem 47. Extract leading non-zero digit

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];
Solve

Solution Stats

56.97% Correct | 43.03% Incorrect
Last Solution submitted on Nov 22, 2024

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers2135

Suggested Problems

More from this Author96

Problem Tags

math mathematics maths

Community Treasure Hunt

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

Start Hunting!