MATLAB: Convert Minutes to hours and minutes

converthours to minutesminutes

How to convert minutes to hours and minutes only?

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See if this does what you want:

hr_min = @(mins) [fix(mins/60) rem(mins,60)];   % Minutes —> [Hrs Min]
mins = [0:15:1440]';                            % Test Data
test = hr_min(mins)                             % Test Output

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MATLAB: Transforming minutes into time

Your minutes array is rolling over to a new day at index = 5, so this adds days whenever the day ‘resets’.

Version #1 — if you have repelem (new in R2015a):

T2400 = [1; find(diff(Tv) < 0); size(Tv,1)+1];
Tv = Tv + repelem([0:length(diff(T2400))-1], diff(T2400))' * 1440;
Result = datestr(datenum([01 01 01]) + Tv/1440, 'HH:MM')

Version #2 (without repelem):

T2400 = [1; find(diff(Tv) < 0); size(Tv,1)];
days = 0;
for k1 = 1:length(T2400)-1
    Tv(T2400(k1):T2400(k1+1)) = Tv(T2400(k1):T2400(k1+1)) + days*1440;
    days = days + 1;
end
Result = datestr(datenum([01 01 01]) + Tv/1440, 'HH:MM')
Result =
15:05
16:30
18:37
20:28
21:46
00:16
02:29
03:31
04:36
05:47
06:58
07:58
08:53
09:41
10:31
11:19
12:10
13:15

EDIT — Added ‘Version #1’.

MATLAB: 15 minutes intervals

Determine the first date of the range. Find the datenum() of midnight on that day. Convert the other values in to datenum() and subtract that base of midnight. Divide the resulting difference by (15*60)/(24*60*60) = 1/(24*60/15) = 1/(24*4) = 1/96 -- so multiply by 96 to do the division. Take the floor() of the result and that vector will be the number of 15 minute bins since midnight on the base date.

Once you have those bin numbers, you can add 1 to each of them and use the result as the subscript for the purposes of accumarray:

accumarray(1+binnum(:), stockprice(:), [], @mean)

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MATLAB: Transforming minutes into time

MATLAB: 15 minutes intervals

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