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# This tests part of a problem as of zoo 1.7-11 that is fixed in the devel version.
#changeTSrepresentation() seems sometimes to need require("zoo") rather than
# requireNamespace("zoo"). zoo needs to overwrite the as.Date() generic since there
# is no default for the origin in the as.Date.numeric() method.
#test2 <- function(){
# loadNamespace("zoo")
# z0 <- ts(matrix(rnorm(10),10,1), start=c(1990,1), frequency=1)
# z1 <- zoo::as.Date(stats::time(z0))
# as.ts(z1)
# }
require("tframePlus")
z0 <- ts(matrix(rnorm(10),10,1), start=c(1990,1), frequency=1)
z <- changeTSrepresentation(z0, "zoo")
z <- changeTSrepresentation(z0, "ts")
z
# this began failing with "the condition has length > 1" in devel version of R-4.1.3, Feb 2021
#if(start(z) != 1990 ) stop("zoo changeTSrepresentation test 1 failed.")
if(frequency(z) != 1) stop("zoo changeTSrepresentation test 2 failed.")
# this began failing with "the condition has length > 1" in devel version of R-4.1.3, Feb 2021
#if( ! z == z0) stop("zoo changeTSrepresentation test 3 failed.")
if(class(z) != "ts") stop("zoo changeTSrepresentation test4 failed.")
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