How to use Find (or any other function) to create an Array

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Lucinda Nott
Lucinda Nott 2020-11-15
评论： Lucinda Nott 2020-11-17
Hi Everyone,
I have an array, S that appears as so:
And I want to Find the last place where a 1 occured. However, I essentially want to find the last place for each column (I am unsure of how to describe this)
I want my find to be as so:
Intervals = [1 1 1 1 1
3 2
4 ]
With using the max function I would like to create the array:
Max = [4 1 1 1 2]
The rows represent days and columns represent the replication - so essential I want to find the last day the replication achieved a 1.
Any help would be greatly appreciated even a push in the right direction :)

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Ameer Hamza
Ameer Hamza 2020-11-15
编辑：Ameer Hamza 2020-11-15
Try this
S = [
1 1 1 1 1
0 0 0 0 1
1 0 0 0 0
1 0 0 0 0
0 0 0 0 0
0 0 0 0 0];
[~, idx] = max(flipud(S));
idx = size(S,1)-idx+1;
Result
>> idx
idx =
4 1 1 1 2

更多回答（1 个）

Alan Stevens
Alan Stevens 2020-11-15
Here's another possible way
r = repmat((1:9)',1,5); max(r.*S_dash)

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