[R] Difficulty with 'loess' function

armstrwa William.Armstrong at noaa.gov
Fri Mar 18 17:54:13 CET 2011


Yeah, I did look at the help(loess) page, but I wasn't really sure what to do
with that.  I was inputting it as:

> test<-loess(date ~ q,data.frame(date,q),span=0.5)
> test
Call:
loess(formula = date ~ q, data = data.frame(date, q), span = 0.5)

Number of Observations: 96 
Equivalent Number of Parameters: 8.08 
Residual Standard Error: 27.82 
> check<-predict(test,date=date)
> check
 [1] 1959.164 1959.516 1963.379 1967.121 1963.781 1970.601 1958.056 1948.846
 [9] 1954.247 1954.718 1969.460 1960.974 1949.845 1962.436 1968.374 1954.247
[17] 1956.135 1948.852 1948.846 1957.893 1963.055 1955.327 1961.453 1960.405
[25] 1956.135 1963.065 1959.358 1954.478 1954.415 1964.323 1963.255 1953.139
[33] 1966.048 1959.353 1961.817 1959.894 1958.251 1964.914 1960.157 1964.656
[41] 1964.164 1949.873 1965.500 1968.323 1962.196 1961.656 1954.977 1969.196
[49] 1962.318 1952.576 1962.655 1968.031 1963.445 1967.856 1961.323 1949.032
[57] 1954.687 1955.613 1982.081 1960.736 1963.466 1974.468 1970.164 1954.212
[65] 1957.928 1957.893 1961.985 1966.180 1963.283 1963.379 1964.387 1970.017
[73] 1959.353 1969.925 1963.111 1962.667 1963.417 1964.029 1965.241 1964.323
[81] 1964.405 1963.036 1981.359 1968.146 1968.374 1970.050 1963.089 1959.667
[89] 1966.129 1958.081 1964.029 1968.374 1967.856 1955.758 1954.619 1965.227
> 

So I guess I'm inputting the formula wrong then?  But from looking at the
help(formula) page, I still wasn't sure what it's looking for.

Thanks.

Billy

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