How to index time interval more efficiently?
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balandong
el 28 de Jun. de 2017
Hi Matlab Coder, The objective is to index each of the matrix, as follow
where_owl = [8 9 32 33 56 57] owl_hide = [9 20 33 44 57 68] owl_awake = [0 8 24 32 48 56]
How to make following code more compact and efficient, especially the for-loop. Thanks in advance
s.days = 3; s.sph = 3600; s.hpd = 24; s.mph = 60;
owl_awake = zeros(1,10); owl_hide = zeros(1,10); where_owl = zeros(1,10); total_hour = 2 * s.days *s.hpd; last_iteration = total_hour/s.hpd; s.sleeptime_time =zeros (1,last_iteration); a=0; %%%%% Case 1: Timing| All unit in seconds for i = 1:2:last_iteration a=a+1; % owl_awake 0000 to 0800 every day owl_awake (:,i) = ((a-1)*s.hpd); owl_awake (:,(i+1))= (8+ ((a-1)*s.hpd)); % owl_hide between 0900 and 2000 owl_hide (:,i) = (9 + ((a-1)*s.hpd)); owl_hide (:,(i+1)) = (20 + ((a-1)*s.hpd)); % where is the owl where_owl (:,i) = (8 + ((a-1)*s.hpd)) ; where_owl (:,(i+1)) = (9 + ((a-1)*s.hpd)); end
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David Goodmanson
el 28 de Jun. de 2017
Editada: David Goodmanson
el 28 de Jun. de 2017
Hi balandong,
Here is one way to accomplish this. At present the function in the script below has no semicolons at the end of a couple of lines so it illustrates what is going on.
s.days = 3
owl_awake = owl(s.days,[0 8])
owl_hide = owl(s.days,[9 20])
% etc.
function hoursvec = owl(ndays,interval)
rep24 = 24*(0:ndays-1);
[a b] = meshgrid(rep24,interval)
apb = (a+b)
hoursvec = apb(:)';
end
If I may ask, what is the owl doing between the hours of 2000 and 2400?
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