Looking at 2 sets of time series data. Code below:
> houst = read.table("C:/Documents/HOUST.txt",header=F)
> houst = ts(houst, start = 1976,frequency = 12)
> mortg = read.table("C:/Documents/mortg.txt",header=F)
> mortg = ts(mortg, start = 1976,frequency = 12)
The data for houst looks like:
1367
1538
1421
1395
1459
1495
1401
1550
......so on
The data for mortg looks like:
9.02
8.81
8.76
8.73
8.77
8.85
8.93
9.00
8.98
8.93
......so on
When I try to run:
> ccf(mortg, houst)
Error in ccf(mortg, houst) : univariate time series only
I get the error above.....I am trying to graph the cross-correlation
function of mortg and houst. Why am I getting the above error? How do I
correct this? Thank you.
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