The problem is in the intersect function that does x = as.vector(x) and
therefore transforms date vector into a numeric .
Try to:
d1 = as.character(data1) ; d2 = as.character(data2)
d = intersect(d1, d2)
data = as.Date(d)
A.
Tom La Bone wrote:
I have two collections of dates and I want to figure out what dates they have
in common. This is not giving me what I want (I don't know what it is giving
me). What is the best way to do this?
Tom
data1
[1] "1948-02-24 EST" "1949-04-12 EST" "1950-05-29 EDT" "1951-05-21 EDT"
[5] "1951-12-20 EST" "1953-01-22 EST" "1955-02-28 EST" "1956-03-08 EST"
[9] "1957-03-22 EST" "1958-02-07 EST"
data2
[1] "1948-02-24 EST" "1949-04-12 EST" "1950-05-29 EDT" "1951-05-21 EDT"
[5] "1951-12-20 EST" "1953-01-22 EST" "1955-02-28 EST" "1956-03-08 EST"
[9] "1957-03-22 EST" "1958-02-07 EST"
intersect(data1,data2)
[1] -689626800 -653943600 -618350400 -587505600 -569098800 -534625200
[7] -468356400 -436042800 -403297200 -375476400
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