Increment dates using for loop
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I'm trying to fill a variable sized datetime array. I then want the declared datetime value to fill the first 3 elements before incrementing by one to fill the next three.This process repeats until the desired sized element is reach. See current output & desired output.
Code:
samples = input("Number of Samples to Generate: ");
DateBuilt = repmat(datetime(0,0,0),samples,1);
t = datetime(2018,1,1);
DateBuilt(1) = t
for i=1:samples
if i <= 3
DateBuilt(i) = t;
else
t = t + 1;
DateBuilt(i) = t;
end
Current Output:
Number of Samples to Generate: 14
DateBuilt =
14×1 datetime array
01-Jan-2018
30-Nov--0001
30-Nov--0001
30-Nov--0001
30-Nov--0001
30-Nov--0001
30-Nov--0001
30-Nov--0001
30-Nov--0001
30-Nov--0001
30-Nov--0001
30-Nov--0001
30-Nov--0001
30-Nov--0001
Desired Output:
Number of Samples to Generate: 14
DateBuilt =
14×1 datetime array
01-Jan-2018
01-Jan-2018
01-Jan-2018
02-Jan-2018
02-Jan-2018
02-Jan-2018
03-Jan-2018
03-Jan-2018
03-Jan-2018
04-Jan-2018
04-Jan-2018
04-Jan-2018
05-Jan-2018
05-Jan-2018
5 commentaires
madhan ravi
le 9 Fév 2019
Modifié(e) : madhan ravi
le 9 Fév 2019
Why in your desired output the last date has only repeated twice , any reason for it?
Réponse acceptée
Eric Sofen
le 9 Fév 2019
Are there any other calculations being done in the loop body of your actual code? If not, this can be done without looping:
samples = input("Number of Samples to Generate: ");
days = floor((0:samples-1)./3)'+1;
dt = datetime(2018,1,days);
If you do really need to loop for some other reason, there are things that need to change in your code:
1) It's missing and end to the conditional block.
2) t = t+1 ends up incrementing the day every iteration.
samples = input("Number of Samples to Generate: ");
DateBuilt = repmat(datetime(0,0,0),samples,1);
t = datetime(2018,1,1);
DateBuilt(1) = t;
for i=1:samples
DateBuilt(i) = t+days(floor((i-1)/3));
end
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Plus de réponses (1)
Stephen23
le 9 Fév 2019
>> D = datetime('01-Jan-2018');
>> N = 14;
>> G = 3;
>> V = D + caldays(0:ceil(N/G)-1).';
>> V = repelem(V,G);
>> V = V(1:N)
V =
01-Jan-2018
01-Jan-2018
01-Jan-2018
02-Jan-2018
02-Jan-2018
02-Jan-2018
03-Jan-2018
03-Jan-2018
03-Jan-2018
04-Jan-2018
04-Jan-2018
04-Jan-2018
05-Jan-2018
05-Jan-2018
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