Storing values in a matrix

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Mohammed Rabani
Mohammed Rabani on 9 Mar 2022
Answered: Peter Perkins on 9 Mar 2022
Hi,
I have a code which finds the daily average from the hourly values and stores them in a variable. I want to store this values in a matrix so I can use them elsewhere later. Please let me know.
for column = 2:width(cooling_load)
x = table2array(cooling_load(:,column));
for i = 0:364
for j=1:24
sumof =sumof + x(i*24+j+2,1);
end
avgg = sumof/24;
sumof=0;
daily(i+1)=avgg;
end
coolingload = daily'
end
  4 Comments
Mohammed Rabani
Mohammed Rabani on 9 Mar 2022
Sorry for the confusion. Idk if this makes more sense but I want to store all the array values into one matrix(or table) instead of individual arrays so I can use them later.

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Accepted Answer

Rik
Rik on 9 Mar 2022
You're already there:
for column = 2:width(cooling_load)
x = table2array(cooling_load(:,column));
for i = 0:364
sumof=0;
for j=1:24
sumof =sumof + x(i*24+j+2,1);
end
avgg = sumof/24;
daily(i+1,column-1)=avgg;
% ^^^^^^^^
% just this simple change
end
end

More Answers (1)

Peter Perkins
Peter Perkins on 9 Mar 2022
This will be MUCH easier using a timetable. It's a one-liner:
>> tt = timetable(rand(100,1),'RowTimes',datetime(2022,3,9,1:100,0,0))
tt =
100×1 timetable
Time Var1
____________________ ________
09-Mar-2022 01:00:00 0.697
09-Mar-2022 02:00:00 0.40754
[snip]
13-Mar-2022 03:00:00 0.089853
13-Mar-2022 04:00:00 0.16103
>> ttDaily = retime(tt,'daily','mean')
ttDaily =
5×1 timetable
Time Var1
___________ _______
09-Mar-2022 0.56102
10-Mar-2022 0.43778
11-Mar-2022 0.49814
12-Mar-2022 0.57098
13-Mar-2022 0.43989
At this point, you can get the means from that daily timetable ...
>> dailyMeans = ttDaily.Var1
dailyMeans =
0.56102
0.43778
0.49814
0.57098
0.43989
... but I doubt you need to. Just leave them there, along with their dates.

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