## hetGP 1.1.7
* Add plot method for CRNGP
* Add logEI optimization criterion
* Clarify internal derivatives
* Fix some NOTE issues
## hetGP 1.1.6
* Add new GP model allowing for common random numbers
* Fix some sign problems in derivatives with Matern3_2
* Avoid some name propagations in internal functions
## hetGP 1.1.5
* bug corrections
* modify class checks
## hetGP 1.1.4
* add JSS article CITATION file
* add citation in DESCRIPTION and some .Rd files
## hetGP 1.1.3
* update vignette
* new fonction to predict at noisy inputs: pred_noisy_input
* update references
* bug corrections (mclapply in IMSPE_search)
* add fast (approximated) batch Expected Improvement
## hetGP 1.1.2
## change / hetGP 1.1.1
* arguments factr and pgtol can now be passed to optim via settings
* prevent optim from returning values not strictly inside [0,1] with IMSPE
* update contour functions: MCU is now MEE, a new MCU is defined following updates in the paper
* parallel computation with mclapply available with IMSPE_optim and crit_optim
* add predictive variance to plot method
* add score function
* new 1d test function + noisy versions
* add generic loglikelihood function
* update vignette
## hetGP 1.1.1
## change / hetGP 1.1.0
* add vignette describing the package
* precisions on noise.var with predict.hetGP in the documentation
* change print method to return summary
* add plot methods to GP and TP models
* catch optim errors when at least one likelihood evaluation worked
* lower and upper are now optional parameters
* IMSPE include the extra term with estimated beta0 (but not crit_IMSPE at this stage)
* IMSE.search and IMSE_nsteps_ahead are now a single function: IMSPE_optim
* update defaults of IMSE.search
* new functions crit_optim mimicking IMSPE_optim for contour/optim criteria
* catch numerical errors in updated variance in contour criteria
* improve partial derivatives wrt theta for Matern kernels
* add time slot in model fitting outputs
* faster trace computations in the symmetric case
* initial theta values when providing lower and upper is now 10% of the range
* fix strip and crit_EI methods (thanks to Rob Smith)
## hetGP 1.1.0
## change / hetGP 1.0.2
* better handling of the penalty term
* update the documentation, rename nu2_hat by nu_hat for consistency with JCGS paper
* several performance improvements (e.g., predict with xprime argument)
* contour finding infill criteria related to arXiv:1807.06712
* add Expected Improvement criterion (beta version)
* correct bug with known mean not used for initialization with mleHetGP/TP
* add leave one out predictions
## hetGP 1.0.2
## change / hetGP 1.0.1
* homTP/heTP update methods
* option settings$return.hom to return or not modHom models with hetGP and hetTP
* new functions to export/import hetGP objects, including a robust re-computation of inverse covariance matrices
* accordingly, predict now only threshold negative predictive variances occuring due to numerical instability with Cholesky inverse
* better initialization with mleHetTP
* improved warnings and error handling
## hetGP 1.0.1
## change / hetGP 1.0.0
* add Student-t modeling (equivalent of mleHetGP and mleHomGP, with predict functions)
* various typos and bugs corrections
* now works on Solaris