Hello all,
I'm working with wind data that is measured every hour, the data is in the form of a matrix of 3 columns, the first is the date, the second is wind speed and the third is wind direction. I have created a code using accumarray in order to get the maximum daily value of wind speed. However I want to be able to get the corresponding wind direction for those maximum values, so for this, I need the indexes of the Maximum values.
I have tried the suggestion from here given by Walter. However, the resulting indexing shows a different result from the one I need (numerical example below): My code is the following:
max_val = accumarray(c,wind(:,2),[],@nanmax);
max_index= accumarray(c,wind(:,2),[],@max_and_idx);
where:
function idx = max_and_idx(x)
[~,idx] = max(x);
end
the answer I get is:
max_val =[4.5 5.1 3.6 2.5 ...
max_index=[16 15 15 12 ...
I checked my data and 4.5 corresponds to position #15 in day 1, 5.1 corresponds to position #16 on day 2 and so on. What I want is the actual position of these numbers within the entire wind matrix. How can I fix this problem?
