pking wrote:
When I run this code from an R-script:
ddd = 360 + round ( atan2(-u,-v) / d2r )
print(class(ddd))
print(ddd)
ifelse ( ddd>360, ddd-360, ddd )
print(ddd)
I get this output:
[1] "numeric"
[1] 461 213 238 249 251
[1] 461 213 238 249 251
Why does ifelse not change the 461 to 101?
Because you never changed ddd
You want the last but one line to be
ddd <- ifelse ( ddd>360, ddd-360, ddd )
I guess.
I recreated the vector ddd and ran the same ifelse
code and it did work as expected.
ddd <- c(461, 213, 238, 249, 251)
print(class(ddd))
[1] "numeric"
print(ddd)
[1] 461 213 238 249 251
ifelse ( ddd>360, ddd-360, ddd )
print(ddd)
[1] 101 213 238 249 251
I doubt.
What am I missing?
That you made an assignment
ddd <- ifelse ( ddd>360, ddd-360, ddd )
that you have not told us (nor youself?) in your second case.
Best,
Uwe Ligges
Patrick King
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