Problem 1911. Find the index of the first occurrence of a value in a matrix
Given a matrix of scalars, find the first occurrence of -1 in each column. Output NaN for a column which does not contain the value. For example
input =
0 0 0 0 -1 -1 0 1 -1 1 0 -1 0 0 0 1
Find row number of first instance of -1 in each column
output = [2 2 NaN 3]
Solution Stats
Problem Comments
Solution Comments
Show commentsProblem Recent Solvers62
Suggested Problems
-
Find the "ordinary" or Euclidean distance between A and Z
159 Solvers
-
399 Solvers
-
"Low : High - Low : High - Turn around " -- Create a subindices vector
525 Solvers
-
The Answer to Life, the Universe, and Everything
514 Solvers
-
construct matrix with identical rows
193 Solvers
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!