Showing 20 of total 20 results (show query)
emanuelhuber
RConics:Computations on Conics
Solve some conic related problems (intersection of conics with lines and conics, arc length of an ellipse, polar lines, etc.).
Maintained by Emanuel Huber. Last updated 27 days ago.
conicsellipseellipticgeometryintersection
28.2 match 4.20 score 53 scripts 2 dependents
cvxgrp
CVXR:Disciplined Convex Optimization
An object-oriented modeling language for disciplined convex programming (DCP) as described in Fu, Narasimhan, and Boyd (2020, <doi:10.18637/jss.v094.i14>). It allows the user to formulate convex optimization problems in a natural way following mathematical convention and DCP rules. The system analyzes the problem, verifies its convexity, converts it into a canonical form, and hands it off to an appropriate solver to obtain the solution. Interfaces to solvers on CRAN and elsewhere are provided, both commercial and open source.
Maintained by Anqi Fu. Last updated 4 months ago.
3.7 match 207 stars 12.89 score 768 scripts 51 dependents
bnaras
ECOSolveR:Embedded Conic Solver in R
R interface to the Embedded COnic Solver (ECOS), an efficient and robust C library for convex problems. Conic and equality constraints can be specified in addition to integer and boolean variable constraints for mixed-integer problems. This R interface is inspired by the python interface and has similar calling conventions.
Maintained by Balasubramanian Narasimhan. Last updated 10 months ago.
5.8 match 5 stars 7.86 score 30 scripts 58 dependents
schloerke
geozoo:Zoo of Geometric Objects
Geometric objects defined in 'geozoo' can be simulated or displayed in the R package 'tourr'.
Maintained by Barret Schloerke. Last updated 9 years ago.
8.4 match 5 stars 5.21 score 100 scripts 2 dependents
florianschwendinger
scs:Splitting Conic Solver
Solves convex cone programs via operator splitting. Can solve: linear programs ('LPs'), second-order cone programs ('SOCPs'), semidefinite programs ('SDPs'), exponential cone programs ('ECPs'), and power cone programs ('PCPs'), or problems with any combination of those cones. 'SCS' uses 'AMD' (a set of routines for permuting sparse matrices prior to factorization) and 'LDL' (a sparse 'LDL' factorization and solve package) from 'SuiteSparse' (<https://people.engr.tamu.edu/davis/suitesparse.html>).
Maintained by Florian Schwendinger. Last updated 2 years ago.
5.2 match 8 stars 6.72 score 16 scripts 53 dependents
oxfordcontrol
clarabel:Interior Point Conic Optimization Solver
A versatile interior point solver that solves linear programs (LPs), quadratic programs (QPs), second-order cone programs (SOCPs), semidefinite programs (SDPs), and problems with exponential and power cone constraints (<https://clarabel.org/stable/>). For quadratic objectives, unlike interior point solvers based on the standard homogeneous self-dual embedding (HSDE) model, Clarabel handles quadratic objective without requiring any epigraphical reformulation of its objective function. It can therefore be significantly faster than other HSDE-based solvers for problems with quadratic objective functions. Infeasible problems are detected using using a homogeneous embedding technique.
Maintained by Balasubramanian Narasimhan. Last updated 27 days ago.
4.8 match 10 stars 5.95 score 4 scripts 2 dependents
pecanproject
PEcAn.data.atmosphere:PEcAn Functions Used for Managing Climate Driver Data
The Predictive Ecosystem Carbon Analyzer (PEcAn) is a scientific workflow management tool that is designed to simplify the management of model parameterization, execution, and analysis. The PECAn.data.atmosphere package converts climate driver data into a standard format for models integrated into PEcAn. As a standalone package, it provides an interface to access diverse climate data sets.
Maintained by David LeBauer. Last updated 3 days ago.
bayesiancyberinfrastructuredata-assimilationdata-scienceecosystem-modelecosystem-scienceforecastingmeta-analysisnational-science-foundationpecanplants
1.6 match 216 stars 11.59 score 64 scripts 14 dependents
r-forge
ROI:R Optimization Infrastructure
The R Optimization Infrastructure ('ROI') <doi:10.18637/jss.v094.i15> is a sophisticated framework for handling optimization problems in R. Additional information can be found on the 'ROI' homepage <http://roi.r-forge.r-project.org/>.
Maintained by Stefan Theussl. Last updated 2 years ago.
2.3 match 7.68 score 506 scripts 47 dependents
corybrunson
ordr:A Tidyverse Extension for Ordinations and Biplots
Ordination comprises several multivariate exploratory and explanatory techniques with theoretical foundations in geometric data analysis; see Podani (2000, ISBN:90-5782-067-6) for techniques and applications and Le Roux & Rouanet (2005) <doi:10.1007/1-4020-2236-0> for foundations. Greenacre (2010, ISBN:978-84-923846) shows how the most established of these, including principal components analysis, correspondence analysis, multidimensional scaling, factor analysis, and discriminant analysis, rely on eigen-decompositions or singular value decompositions of pre-processed numeric matrix data. These decompositions give rise to a set of shared coordinates along which the row and column elements can be measured. The overlay of their scatterplots on these axes, introduced by Gabriel (1971) <doi:10.1093/biomet/58.3.453>, is called a biplot. 'ordr' provides inspection, extraction, manipulation, and visualization tools for several popular ordination classes supported by a set of recovery methods. It is inspired by and designed to integrate into 'tidyverse' workflows provided by Wickham et al (2019) <doi:10.21105/joss.01686>.
Maintained by Jason Cory Brunson. Last updated 13 days ago.
biplotdata-visualizationdimension-reductiongeometric-data-analysisgrammar-of-graphicslog-ratio-analysismultivariate-analysismultivariate-statisticsordinationtidymodelstidyverse
2.3 match 24 stars 7.26 score 28 scripts
jayanilakshika
cardinalR:Collection of Data Structures
A collection of simple simulation datasets designed for generating Nonlinear Dimension Reduction representations techniques such as t-distributed Stochastic Neighbor Embedding, and Uniform Manifold Approximation and Projection. These datasets serve as a valuable resource for understanding the reliability of Nonlinear Dimension Reduction representations in various contexts.
Maintained by Jayani P.G. Lakshika. Last updated 12 days ago.
3.4 match 4.54 score
yaziciceyda
cmaRs:Implementation of the Conic Multivariate Adaptive Regression Splines in R
An implementation of 'Conic Multivariate Adaptive Regression Splines (CMARS)' in R. See Weber et al. (2011) CMARS: a new contribution to nonparametric regression with multivariate adaptive regression splines supported by continuous optimization, <DOI:10.1080/17415977.2011.624770>. It constructs models by using the terms obtained from the forward step of MARS and then estimates parameters by using 'Tikhonov' regularization and conic quadratic optimization. It is possible to construct models for prediction and binary classification. It provides performance measures for the model developed. The package needs the optimisation software 'MOSEK' <https://www.mosek.com/> to construct the models. Please follow the instructions in 'Rmosek' for the installation.
Maintained by Ceyda Yazici. Last updated 2 years ago.
3.6 match 3.70 score 2 scripts
ben-schwen
holiglm:Holistic Generalized Linear Models
Holistic generalized linear models (HGLMs) extend generalized linear models (GLMs) by enabling the possibility to add further constraints to the model. The 'holiglm' package simplifies estimating HGLMs using convex optimization. Additional information about the package can be found in the reference manual, the 'README' and the accompanying paper <doi:10.18637/jss.v108.i07>.
Maintained by Benjamin Schwendinger. Last updated 3 months ago.
3.8 match 3 stars 2.78 score
pacificclimate
ncdf4.helpers:Helper Functions for Use with the 'ncdf4' Package
Contains a collection of helper functions for dealing with 'NetCDF' files <https://www.unidata.ucar.edu/software/netcdf/> opened using 'ncdf4', particularly 'NetCDF' files that conform to the Climate and Forecast (CF) Metadata Conventions <http://cfconventions.org/Data/cf-conventions/cf-conventions-1.7/cf-conventions.html>.
Maintained by Lee Zeman. Last updated 3 years ago.
1.7 match 5 stars 5.85 score 236 scripts 1 dependents
cran
conicfit:Algorithms for Fitting Circles, Ellipses and Conics Based on the Work by Prof. Nikolai Chernov
Geometric circle fitting with Levenberg-Marquardt (a, b, R), Levenberg-Marquardt reduced (a, b), Landau, Spath and Chernov-Lesort. Algebraic circle fitting with Taubin, Kasa, Pratt and Fitzgibbon-Pilu-Fisher. Geometric ellipse fitting with ellipse LMG (geometric parameters) and conic LMA (algebraic parameters). Algebraic ellipse fitting with Fitzgibbon-Pilu-Fisher and Taubin.
Maintained by Jose Gama. Last updated 9 years ago.
5.0 match 1.78 score 2 dependents
inbo
inbospatial:A Collection of Useful R Functions for Spatial Data
Useful R functions developed at the Research Institute for Nature and Forest (INBO) for dealing with spatial raster or vector data.
Maintained by Hans Van Calster. Last updated 4 months ago.
1.7 match 5 stars 4.18 score 7 scripts
pachadotdev
canadamaps:Maps of the Political and Administrative Divisions of Canada
Terrestrial maps with simplified topologies for Census Divisions, Agricultural Regions, Economic Regions, Federal Electoral Divisions and Provinces.
Maintained by Mauricio Vargas Sepulveda. Last updated 12 months ago.
1.7 match 2 stars 3.00 score 3 scriptsr-forge
ROI.plugin.ecos:'ECOS' Plugin for the 'R' Optimization Infrastructure
Enhances the 'R' Optimization Infrastructure ('ROI') package with the Embedded Conic Solver ('ECOS') for solving conic optimization problems.
Maintained by Florian Schwendinger. Last updated 2 years ago.
0.9 match 3.35 score 25 scripts 3 dependentscran
InvasionCorrection:Invasion Correction
The correction is achieved under the assumption that non-migrating cells of the essay approximately form a quadratic flow profile due to frictional effects, compare law of Hagen-Poiseuille for flow in a tube. The script fits a conical plane to give xyz-coordinates of the cells. It outputs the number of migrated cells and the new corrected coordinates.
Maintained by Marcus Rosenblatt. Last updated 8 years ago.
2.3 match 1.00 score
stla
Carlson:Carlson Elliptic Integrals and Incomplete Elliptic Integrals
Evaluation of the Carlson elliptic integrals and the incomplete elliptic integrals with complex arguments. The implementations use Carlson's algorithms <doi:10.1007/BF02198293>. Applications of elliptic integrals include probability distributions, geometry, physics, mechanics, electrodynamics, statistical mechanics, astronomy, geodesy, geodesics on conics, and magnetic field calculations.
Maintained by Stéphane Laurent. Last updated 1 years ago.
elliptic-integralsspecial-functionscpp
0.5 match 1 stars 3.26 score 12 scripts 1 dependents