Nothing
for (kernel in c("gauss","exp","matern3_2","matern5_2")) {
context(paste0("Check predict 1D for kernel ",kernel))
#library(testthat)
#library(rlibkriging, lib.loc="bindings/R/Rlibs")
#rlibkriging:::optim_log(3)
#kernel="exp"
f = function(x) 1-1/2*(sin(12*x)/(1+x)+2*cos(7*x)*x^5+0.7)
#plot(f)
n <- 5
set.seed(123)
X <- as.matrix(runif(n))
y = f(X) + 0.1*rnorm(nrow(X))
#points(X,y)
k = DiceKriging::km(design=X,noise.var=rep(0.1^2,nrow(X)),response=y,covtype = "gauss",control = list(trace=F), nugget.estim = F)
library(rlibkriging)
r <- NoiseKriging(y,noise=rep(0.1^2,nrow(X)),X,"gauss","constant",FALSE,"none","LL",
parameters=list(sigma2=k@covariance@sd2,has_sigma2=TRUE, is_sigma2_estim=FALSE,
theta=matrix(k@covariance@range.val),has_theta=TRUE, is_theta_estim=FALSE))
# m = as.list(r)
ntest <- 100
Xtest <- as.matrix(runif(ntest))
ptest <- DiceKriging::predict(k,Xtest,type="UK",cov.compute = TRUE,checkNames=F)
Yktest <- ptest$mean
sktest <- ptest$sd
cktest <- c(ptest$cov)
Ytest <- predict(r,Xtest,TRUE,TRUE)
plot(f)
points(X,y)
points(Xtest,Yktest,col='blue')
points(Xtest,Ytest$mean,col='red')
precision <- 1e-5
test_that(desc=paste0("pred mean is the same that DiceKriging one:\n ",paste0(collapse=",",Yktest),"\n ",paste0(collapse=",",Ytest$mean)),
expect_equal(array(Yktest),array(Ytest$mean),tol = precision))
test_that(desc="pred sd is the same that DiceKriging one",
expect_equal(array(sktest),array(Ytest$stdev) ,tol = precision))
test_that(desc="pred cov is the same that DiceKriging one",
expect_equal(cktest,c(Ytest$cov) ,tol = precision))
plot(f)
points(X,y)
x=seq(0,1,,101)
lines(x,predict(k,x,type="UK",checkNames=F)$mean,lty=2,col='blue')
polygon(
c(x,rev(x)),
c(predict(k,x,type="UK",checkNames=F)$mean-predict(k,x,type="UK",checkNames=F)$sd,
predict(k,rev(x),type="UK",checkNames=F)$mean+predict(k,rev(x),type="UK",checkNames=F)$sd),
col=rgb(0,0,1,.1),border=NA)
lines(x,predict(r,x)$mean,lty=2,col='red')
polygon(
c(x,rev(x)),
c(predict(r,x)$mean-predict(r,x)$stdev,
predict(r,rev(x))$mean+predict(r,rev(x))$stdev),
col=rgb(1,0,0,.1),border=NA)
#
#for (i in 1:10)
# lines(x,simulate(r,x=x,seed=i),col='grey')
.x = seq(0.1,0.9,,11)
p_allx = predict(r,.x,TRUE, cov=FALSE, deriv=TRUE)
for (i in 1:length(.x)) {
# ref from DiceOptim::EI.grad
newdata = .x[i]
model = k
T <- model@T
X <- model@X
z <- model@z
u <- model@M
covStruct <- model@covariance
predx <- predict(object=model, newdata=newdata, type="UK", checkNames = FALSE,se.compute=TRUE,cov.compute=FALSE)
kriging.mean <- predx$mean
kriging.sd <- predx$sd
v <- predx$Tinv.c
c <- predx$c
dc <- DiceKriging::covVector.dx(x=newdata, X=X, object=covStruct, c=c)
#d = model@d
#h=sqrt(.Machine$double.eps)
#A <- matrix(newdata, nrow=d, ncol=d, byrow=TRUE)
#Apos <- A+h*diag(d)
#Aneg <- A-h*diag(d)
#newpoints <- data.frame(rbind(Apos, Aneg))
#f.newdata <- model.matrix(model@trend.formula, data = newpoints)
#f.deltax <- (f.newdata[1:d,]-f.newdata[(d+1):(2*d),])/(2*h)
f.deltax <- DiceKriging::trend.deltax(x=newdata, model=model)
W <- backsolve(t(T), dc, upper.tri=FALSE)
kriging.mean.grad <- t(W)%*%z + t(model@trend.coef%*%f.deltax)
tuuinv <- solve(t(u)%*%u)
F.newdata <- model.matrix(model@trend.formula, data=as.data.frame(newdata))
kriging.sd2.grad <- t( -2*t(v)%*%W +
2*(F.newdata - t(v)%*%u )%*% tuuinv %*%
(f.deltax - t(t(W)%*%u) ))
kriging.sd.grad <- kriging.sd2.grad / (2*kriging.sd)
p = predict(r,.x[i],TRUE, cov=FALSE, deriv=TRUE)
test_that(desc=paste0("vect pred mean deriv is ok:\n ",paste0(collapse=",",p_allx$mean_deriv[i]),"\n ",paste0(collapse=",",p$mean_deriv)),
expect_equal(array(p_allx$mean_deriv[i]),array(p$mean_deriv),tol = precision))
test_that(desc=paste0("vect pred sd deriv is ok:\n ",paste0(collapse=",",p_allx$stdev_deriv[i]),"\n ",paste0(collapse=",",p$stdev_deriv)),
expect_equal(array(p_allx$stdev_deriv[i]),array(p$stdev_deriv),tol = precision))
arrows(.x[i],p$mean, .x[i]+0.1, p$mean+0.1*p$mean_deriv)
arrows(.x[i],p$mean+p$stdev, .x[i]+0.1, p$mean+p$stdev+0.1*p$mean_deriv+0.1*p$stdev_deriv, col='darkgrey')
test_that(desc=paste0("pred mean deriv is the same that DiceKriging one:\n ",paste0(collapse=",",kriging.mean.grad),"\n ",paste0(collapse=",",p$mean_deriv)),
expect_equal(array(kriging.mean.grad),array(p$mean_deriv),tol = precision))
test_that(desc=paste0("pred sd deriv is the same that DiceKriging one:\n ",paste0(collapse=",",kriging.sd.grad),"\n ",paste0(collapse=",",p$stdev_deriv)),
expect_equal(array(kriging.sd.grad),array(p$stdev_deriv),tol = precision))
}
}
test_that(desc="pred cov is the same that DiceKriging one",
expect_equal(cktest,c(Ytest$cov) ,tol = precision))
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