user2961410
Reputation: 73
How do I find the length of a column ending at a specific value within the column?
How do I find the length of a column ending at a specific value within the column in R?
I have been stuck on this for hours please help!
Upvotes: 0
Views: 90
Answers (1)
Carl Witthoft
Reputation: 21492
Your question is incomplete: for example, do you want the first instance of the specific value? if so, then
which( my_matrix[,my_column_number] == my_value) will return the index of the match, which happens to be the length to that point in the column. (Usual warnings about using == with floating-point data apply).
Upvotes: 1
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