[R] Problem with contour(): typo
Puetz, Benno
puetz @end|ng |rom p@ych@mpg@de
Tue Sep 29 13:14:22 CEST 2020
I would assume the following snippet does what you want - note the use of outer with anonymous function wrapping powerTOST:
z <- outer(xs, ys, function(x, y)power.TOST(CV = y, theta0 = x, design = "2x2x4", method = "central", n = res[1]))
contour(xs, ys, z)
Benno
> On 29. Sep 2020, at 12:43, Helmut Schütz <helmut.schuetz using bebac.at> wrote:
>
> Dear Duncan,
>
> Duncan Murdoch wrote on 2020-09-29 11:57:
>> On 29/09/2020 5:37 a.m., Helmut Schütz wrote:
>>> Here I'm lost. power.TOST(theta0, CV, ...) vectorizes properly for
>>> theta0 _or_ CV but no _both_. Hence
>>> library(PowerTOST)
>>> power.TOST(theta0 = c(0.9, 0.95, 1), CV = 0.25, n = 28)
>>> and
>>> power.TOST(theta0 = 0.95, CV = c(0.2, 0.25, 0.3), n = 28)
>>> work, whereas
>>> power.TOST(theta0 = c(0.9, 0.95, 1), 0.95, CV = c(0.2, 0.25, 0.3), n = 28)
>>> not. Of note, we will throw an error in the next release if both
>>> arguments are vectors.
>>
>> I wouldn't do that, because it doesn't fit the usual R style. It's very common for functions to allow vector inputs in several arguments, and match up corresponding values to form a vector result.
>
> I see. Here it would require to give the result as a matrix, data.frame,... Substantial change in the code though doable.
>
>> If you want to use Vectorize, the command would be
>>
>> power.TOST.vectorized <- Vectorize(power.TOST, c("theta0", "CV"))
>
> library(PowerTOST)
> theta0 <- unique(sort(c(0.95, seq(0.95*0.95, 1, length.out = 10))))
> CV <- unique(sort(c(0.25, seq(0.25*0.8, 0.25*1.2, length.out = 10))))
> power.TOST.vectorized <- Vectorize(power.TOST, c("theta0", "CV", "n"))
> and
> power.TOST.vectorized(theta0 = theta0, CV = CV, n = 28)
> gives the diagonal elements of the desired 11*11 matrix:
> z <- matrix(ncol = length(theta0), nrow = length(CV))
> for (i in seq_along(CV)) {
> z[i, ] <- power.TOST(theta0 = theta0, CV = CV[i], n = 28)
> }
>
> Helmut
>
> --
> Ing. Helmut Schütz
> BEBAC – Consultancy Services for
> Bioequivalence and Bioavailability Studies
> Neubaugasse 36/11
> 1070 Vienna, Austria
> E helmut.schuetz using bebac.at
> W https://bebac.at/
> F https://forum.bebac.at/
>
>
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