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"Rata Die". Counting Days since...

 

Counting Days since...

https://en.wikipedia.org/wiki/Rata_Die



# col1 is an exported column of dates

lastDay = 54 # last row in the column sorted by the date

daysSince(x) = Dates.datetime2rata(x) - Dates.datetime2rata(col1[lastDay])

arrayDays = Array{Int64}(undef, lastDay) # array size is 54

for i = 1:lastDay

    arrayDays[i] = daysSince(col1[i])

end

arrayDays


Output:

54-element Array{Int64,1}:
 613
 606
 599
 592
 582
 575
 568
 554
 547
 540
 533
 526
 512
   ⋮


by Uki D. Lucas on Wednesday, August 12, 2020
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“A man should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.”  by Robert A. Heinlein

"We are but habits and memories we chose to carry along." ~ Uki D. Lucas

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