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Asked: 2026-06-12T08:22:26+00:00

I have a Dataset_1 that only has some values some months, e.g. Day Month

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I have a Dataset_1 that only has some values some months, e.g. 

Day Month   Year    Value
10  5   2003    12
17  5   2003    46
1   6   2003    23
16  6   2003    43
16  10  2003    23
26  10  2003    12

and Dataset_2 that has regular 1 hour values for the same time period e.g

Day Month   Year    Hour Value
10  5       2003    0:00 13
10  5       2003    1:00 12
(...)
26  10      2003    21:00 12
26  10      2003    22:00 12

Dataset_1 is used to evaluate Dataset_2. I would therefore like to plot the regular-interval-Dataset_2 against the not-so-regular-Dataset_1. Is there a way, probably using the date stamps that are in common, to plot all the timesteps of Dataset_2 but to get R to plot the points of Dataset_1 at the corresponding date of Dataset_2?

Thank you.

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1 Answer

  1. Editorial Team

    The only thing you have to do is to declare your dates and time as indeed date and time objects:

    Dataset_1$timestamp <- strptime(paste(Dataset_1$Day, Dataset_1$Month, 
                                Dataset_1$Year, sep="-"), format="%d-%m-%Y")
Dataset_2$timestamp <- strptime(paste(Dataset_2$Hour, Dataset_2$Day, 
                                Dataset_2$Month, Dataset_2$Year, sep="-"), 
                                format="%H:%M-%d-%m-%Y")

    You can then plot your data normally without taking any specific precaution because plotwill recognize they are date and time objects.

    plot(Dataset_1$timestamp, Dataset_1$Value)
lines(Dataset_2$timestamp, Dataset_2$Value)
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