Creates the optimal (D, U and I) designs for the accelerated life
testing with right censoring or interval censoring. It uses generalized
linear model (GLM) approach to derive the asymptotic variance-covariance
matrix of regression coefficients. The failure time distribution is assumed
to follow Weibull distribution with a known shape parameter and log-linear
link functions are used to model the relationship between failure time
parameters and stress variables. The acceleration model may have multiple
stress factors, although most ALTs involve only two or less stress factors.
ALTopt package also provides several plotting functions including contour plot,
Fraction of Use Space (FUS) plot and Variance Dispersion graphs of Use Space
(VDUS) plot.

c(person("Kangwon", "Seo", role = c("aut", "cre"),
email = "seoka@missouri.edu"),
person("Rong", "Pan", role =  "aut",
email = "rong.pan@asu.edu"))
Creates the optimal (D, U and I) designs for the accelerated life
testing with right censoring or interval censoring. It uses generalized
linear model (GLM) approach to derive the asymptotic variance-covariance
matrix of regression coefficients. The failure time distribution is assumed
to follow Weibull distribution with a known shape parameter and log-linear
link functions are used to model the relationship between failure time
parameters and stress variables. The acceleration model may have multiple
stress factors, although most ALTs involve only two or less stress factors.
ALTopt package also provides several plotting functions including contour plot,
Fraction of Use Space (FUS) plot and Variance Dispersion graphs of Use Space
(VDUS) plot. For more details, see Seo and Pan (2015) <doi:10.32614/RJ-2015-029>.
cubature (>= 1.0), lattice (>= 0.20), methods

c(
person("Al-Ahmadgaid B.", "Asaad", , "alahmadgaid@gmail.com", role = c("aut", "cre"),
comment = c(ORCID = "0000-0003-3784-8593")
),
person("Arnold R.", "Salvacion", , "arsalvacion@gmail.com", role = "aut",
comment = c(ORCID = "0000-0001-8868-2226")
),
person("Bui", "Tan Yen", , "", role = "aut")
)
Al-Ahmadgaid B. Asaad [aut, cre]
(<https://orcid.org/0000-0003-3784-8593>),
Arnold R. Salvacion [aut] (<https://orcid.org/0000-0001-8868-2226>),
Bui Tan Yen [aut]
Evaluates land suitability for different crops production.
The package is based on the Food and Agriculture Organization (FAO) and the
International Rice Research Institute (IRRI) methodology for land evaluation.
Development of ALUES is inspired by similar tool for land evaluation, Land Use
Suitability Evaluation Tool (LUSET). The package uses fuzzy logic approach to evaluate
land suitability of a particular area based on inputs such as rainfall, temperature,
topography, and soil properties. The membership functions used for fuzzy modeling are
the following: Triangular, Trapezoidal and Gaussian. The methods for computing the
overall suitability of a particular area are also included, and these are the Minimum,
Maximum and Average. Finally, ALUES is a highly optimized library with core algorithms
written in C++.
testthat, markdown, knitr, microbenchmark, ggmap, raster,
reshape2