Às 11:12 de 16/10/2023, ahmet varlı escreveu:

Hello everyone,

� had 15 minutes of data from 2017-11-02 13:30:00 to  2022-11-26 23:45:00 and 
number of data is 177647

� would like to ask why my time series are less then my expectation.


baslangic <- as.POSIXct("2017-11-02 13:30:00", tz = "CET")
bitis <- as.POSIXct("2022-11-26 23:45:00", tz = "CET")  #
zaman_seti <- seq.POSIXt(from = baslangic, to = bitis, by = 60 * 15)


length(zaman_seti)
[1] 177642

but it has to be  177647



and secondly � have times in this format ( 2.11.2017 13:30/DD-MM-YYYY HH:MM:SS)

su_seviyeleri_data <- as.POSIXct(su_seviyeleri_data$kayit_zaman, format = "%Y-%m-%d 
%H:%M:%S")

I am using this code to change the format but it gives result as Na

How can � solve this problem?

Bests,





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Hello,

Given your date format, try


format = "%d.%m.%Y %H:%M"


Test with your date time:



x <- "2.11.2017 13:30"
as.POSIXct(x, format = "%d.%m.%Y %H:%M")
#> [1] "2017-11-02 13:30:00 WET"

as.POSIXct(su_seviyeleri_data$kayit_zaman, format = "%d.%m.%Y %H:%M")


Hope this helps,

Rui Barradas


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