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bogdan romocea

2004-Oct-13 17:19 UTC

[R] incomplete function output

Dear R users,

I have a function (below) which encompasses several tests.
However, when I run it, only the output of the last test is
displayed. How can I ensure that the function root(var)
will run and display the output from all tests, and not
just the last one?

Thank you,
b.

root <- function(var)
{
#---Phillips-Perron
PP.test(var, lshort = TRUE) 
PP.test(var, lshort = FALSE) 

#---Augmented Dickey-Fuller 
adf.test(var, alternative = "stationary", k
trunc((length(var)-1)^(1/3)))

#---KPSS
kpss.test(var, null = "Level", lshort = TRUE)
kpss.test(var, null = "Trend", lshort = FALSE)
}

Austin, Matt

2004-Oct-13 17:28 UTC

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[R] incomplete function output

I would return the values from the various tests in a list. If you only want
them to print and not for use in other parts of your program you could
explicitly print each test using print().

root <- function(var)
{
#---Phillips-Perron
 test1 <- PP.test(var, lshort = TRUE) 
 test2 <- PP.test(var, lshort = FALSE) 

#---Augmented Dickey-Fuller 
 test3 <- adf.test(var, alternative = "stationary", k  test4 <-
trunc((length(var)-1)^(1/3)))

#---KPSS
 test5 <- kpss.test(var, null = "Level", lshort = TRUE)
 test6 <- kpss.test(var, null = "Trend", lshort = FALSE)
 list(test1, test2, test3, test4, test5, test6)
}

--Matt
-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch]On Behalf Of bogdan romocea
Sent: Wednesday, October 13, 2004 10:20 AM
To: r-help at stat.math.ethz.ch
Subject: [R] incomplete function output


Dear R users,

I have a function (below) which encompasses several tests.
However, when I run it, only the output of the last test is
displayed. How can I ensure that the function root(var)
will run and display the output from all tests, and not
just the last one?

Thank you,
b.

root <- function(var)
{
#---Phillips-Perron
PP.test(var, lshort = TRUE) 
PP.test(var, lshort = FALSE) 

#---Augmented Dickey-Fuller 
adf.test(var, alternative = "stationary", k
trunc((length(var)-1)^(1/3)))

#---KPSS
kpss.test(var, null = "Level", lshort = TRUE)
kpss.test(var, null = "Trend", lshort = FALSE)
}

______________________________________________
R-help at stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html

Spencer Graves

2004-Oct-13 17:28 UTC

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[R] incomplete function output

Only the last appears, because the function returns only the last, 
which then gets printed.  The answer to your question depends on whether 
you want to see the results or store them.  To see them, try the 
following:      

root.print <- function(var)
{
#---Phillips-Perron
print(PP.test(var, lshort = TRUE) )
print(PP.test(var, lshort = FALSE) )

#---Augmented Dickey-Fuller 
print(adf.test(var, alternative = "stationary", k
trunc((length(var)-1)^(1/3))))

#---KPSS
print(kpss.test(var, null = "Level", lshort = TRUE))
print(kpss.test(var, null = "Trend", lshort = FALSE))
}

	  To store the results, try:  

root.store <- function(var)
{
#---Phillips-Perron
t1 <- PP.test(var, lshort = TRUE) 
t2 <- PP.test(var, lshort = FALSE) 

#---Augmented Dickey-Fuller 
t3 <- adf.test(var, alternative = "stationary", k
trunc((length(var)-1)^(1/3)))

#---KPSS
t4 <- kpss.test(var, null = "Level", lshort = TRUE)
t5 <- kpss.test(var, null = "Trend", lshort = FALSE)
list(PP.testT=t1, PP.testF=t2, adf.test=t3, kpss.testT=t4, kpss.testF=t5)
}

	  hope this helps.  
	  spencer graves

bogdan romocea wrote:
>Dear R users,
>
>I have a function (below) which encompasses several tests.
>However, when I run it, only the output of the last test is
>displayed. How can I ensure that the function root(var)
>will run and display the output from all tests, and not
>just the last one?
>
>Thank you,
>b.
>
>root <- function(var)
>{
>#---Phillips-Perron
>PP.test(var, lshort = TRUE) 
>PP.test(var, lshort = FALSE) 
>
>#---Augmented Dickey-Fuller 
>adf.test(var, alternative = "stationary", k
>trunc((length(var)-1)^(1/3)))
>
>#---KPSS
>kpss.test(var, null = "Level", lshort = TRUE)
>kpss.test(var, null = "Trend", lshort = FALSE)
>}
>
>______________________________________________
>R-help at stat.math.ethz.ch mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
>  
>
-- 
Spencer Graves, PhD, Senior Development Engineer
O:  (408)938-4420;  mobile:  (408)655-4567

Sundar Dorai-Raj

2004-Oct-13 17:30 UTC

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[R] incomplete function output

bogdan romocea wrote:> Dear R users,
> 
> I have a function (below) which encompasses several tests.
> However, when I run it, only the output of the last test is
> displayed. How can I ensure that the function root(var)
> will run and display the output from all tests, and not
> just the last one?
> 
> Thank you,
> b.
> 
> root <- function(var)
> {
> #---Phillips-Perron
> PP.test(var, lshort = TRUE) 
> PP.test(var, lshort = FALSE) 
> 
> #---Augmented Dickey-Fuller 
> adf.test(var, alternative = "stationary", k >
trunc((length(var)-1)^(1/3)))
> 
> #---KPSS
> kpss.test(var, null = "Level", lshort = TRUE)
> kpss.test(var, null = "Trend", lshort = FALSE)
> }
> 

You should store all your results in a list and return the list:

root <- function(var) {
   # create empty list
   ret <- list()

   #---Phillips-Perron
   ret[[1]] <- PP.test(var, lshort = TRUE)
   ret[[2]] <- PP.test(var, lshort = FALSE)

   #---Augmented Dickey-Fuller
   ret[[3]] <- adf.test(var, alternative = "stationary",
                        k = trunc((length(var)-1)^(1/3)))

   #---KPSS
   ret[[4]] <- kpss.test(var, null = "Level", lshort = TRUE)
   ret[[5]] <- kpss.test(var, null = "Trend", lshort = FALSE)

   # give `ret' some meaningful names
   names(ret) <- c("PP1", "PP2", "ADF",
"KPSS1", "KPSS2")

   # return list
   ret
}

results <- root(somevar)

HTH,

--sundar

P.S. Also note my indenting which makes code more readable, especially 
if you expect other to try to read it.

Randy Johnson [Contr]

2004-Oct-13 17:41 UTC

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[R] incomplete function output

You can return a list of them all

root <- function(var)
{
    return(list(test1 = PP.test(var, lshort = T), 
                test2 = ...))
}

output <- root(var)

Then you can print them, save them, or whatever.
Or you could just print them out in the function

root <- function(var)
{
#---Phillips-Perron
print(PP.test(var, lshort = TRUE))
print(PP.test(var, lshort = FALSE))
.
.
.
}

Randy

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Randy Johnson [Contr.]
Laboratory of Genomic Diversity   |\
NCI Frederick   ___lll__/|   |\  ()
(301)846-1304    (_|||_)\|  ()
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of bogdan romocea
Sent: Wednesday, October 13, 2004 1:20 PM
To: r-help at stat.math.ethz.ch
Subject: [R] incomplete function output

Dear R users,

I have a function (below) which encompasses several tests.
However, when I run it, only the output of the last test is
displayed. How can I ensure that the function root(var)
will run and display the output from all tests, and not
just the last one?

Thank you,
b.

root <- function(var)
{
#---Phillips-Perron
PP.test(var, lshort = TRUE) 
PP.test(var, lshort = FALSE) 

#---Augmented Dickey-Fuller 
adf.test(var, alternative = "stationary", k
trunc((length(var)-1)^(1/3)))

#---KPSS
kpss.test(var, null = "Level", lshort = TRUE)
kpss.test(var, null = "Trend", lshort = FALSE)
}

______________________________________________
R-help at stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html

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