shape - Functions for Plotting Graphical Shapes, Colors

Functions for plotting graphical shapes such as ellipses, circles, cylinders, arrows, ...

Last updated 9 months ago

10.89 score 1.3k packages 932 scripts 208k downloads

diagram - Functions for Visualising Simple Graphs (Networks), Plotting Flow Diagrams

Visualises simple graphs (networks) based on a transition matrix, utilities to plot flow diagrams, visualising webs, electrical networks, etc. Support for the book "A practical guide to ecological modelling - using R as a simulation platform" by Karline Soetaert and Peter M.J. Herman (2009), Springer. and the book "Solving Differential Equations in R" by Karline Soetaert, Jeff Cash and Francesca Mazzia (2012), Springer. Includes demo(flowchart), demo(plotmat), demo(plotweb).

Last updated 4 years ago

10.06 score 462 packages 594 scripts 139k downloads

plot3D - Plotting Multi-Dimensional Data

Functions for viewing 2-D and 3-D data, including perspective plots, slice plots, surface plots, scatter plots, etc. Includes data sets from oceanography.

Last updated 10 months ago

9.68 score 3 stars 78 packages 2.1k scripts 16k downloads

rootSolve - Nonlinear Root Finding, Equilibrium and Steady-State Analysis of Ordinary Differential Equations

Routines to find the root of nonlinear functions, and to perform steady-state and equilibrium analysis of ordinary differential equations (ODE). Includes routines that: (1) generate gradient and jacobian matrices (full and banded), (2) find roots of non-linear equations by the 'Newton-Raphson' method, (3) estimate steady-state conditions of a system of (differential) equations in full, banded or sparse form, using the 'Newton-Raphson' method, or by dynamically running, (4) solve the steady-state conditions for uni-and multicomponent 1-D, 2-D, and 3-D partial differential equations, that have been converted to ordinary differential equations by numerical differencing (using the method-of-lines approach). Includes fortran code.

Last updated 1 years ago

9.53 score 1 stars 207 packages 1.0k scripts 54k downloads

FME - A Flexible Modelling Environment for Inverse Modelling, Sensitivity, Identifiability and Monte Carlo Analysis

Provides functions to help in fitting models to data, to perform Monte Carlo, sensitivity and identifiability analysis. It is intended to work with models be written as a set of differential equations that are solved either by an integration routine from package 'deSolve', or a steady-state solver from package 'rootSolve'. However, the methods can also be used with other types of functions.

Last updated 1 years ago

8.51 score 9 packages 358 scripts 2.2k downloads

limSolve - Solving Linear Inverse Models

Functions that (1) find the minimum/maximum of a linear or quadratic function: min or max (f(x)), where f(x) = ||Ax-b||^2 or f(x) = sum(a_i*x_i) subject to equality constraints Ex=f and/or inequality constraints Gx>=h, (2) sample an underdetermined- or overdetermined system Ex=f subject to Gx>=h, and if applicable Ax~=b, (3) solve a linear system Ax=B for the unknown x. It includes banded and tridiagonal linear systems.

Last updated 10 months ago

7.88 score 4 stars 50 packages 158 scripts 4.0k downloads

ReacTran - Reactive Transport Modelling in 1d, 2d and 3d

Routines for developing models that describe reaction and advective-diffusive transport in one, two or three dimensions. Includes transport routines in porous media, in estuaries, and in bodies with variable shape.

Last updated 7 years ago

4.59 score 6 stars 54 scripts 327 downloads

marelac - Tools for Aquatic Sciences

Datasets, constants, conversion factors, and utilities for 'MArine', 'Riverine', 'Estuarine', 'LAcustrine' and 'Coastal' science. The package contains among others: (1) chemical and physical constants and datasets, e.g. atomic weights, gas constants, the earths bathymetry; (2) conversion factors (e.g. gram to mol to liter, barometric units, temperature, salinity); (3) physical functions, e.g. to estimate concentrations of conservative substances, gas transfer and diffusion coefficients, the Coriolis force and gravity; (4) thermophysical properties of the seawater, as from the UNESCO polynomial or from the more recent derivation based on a Gibbs function.

Last updated 1 years ago

4.57 score 4 packages 104 scripts 545 downloads

LIM - Linear Inverse Model Examples and Solution Methods

Functions that read and solve linear inverse problems (food web problems, linear programming problems). These problems find solutions to linear or quadratic functions: min or max (f(x)), where f(x) = ||Ax-b||^2 or f(x) = sum(ai*xi) subject to equality constraints Ex=f and inequality constraints Gx>=h.

Last updated 10 months ago

4.28 score 1 packages 32 scripts 319 downloads

OceanView - Visualisation of Oceanographic Data and Model Output

Functions for transforming and viewing 2-D and 3-D (oceanographic) data and model output.

Last updated 10 months ago

4.06 score 57 scripts 369 downloads

NetIndices - Estimating Network Indices, Including Trophic Structure of Foodwebs in R

Given a network (e.g. a food web), estimates several network indices. These include: Ascendency network indices, Direct and indirect dependencies, Effective measures, Environ network indices, General network indices, Pathway analysis, Network uncertainty indices and constraint efficiencies and the trophic level and omnivory indices of food webs.

Last updated 3 years ago

3.90 score 2 packages 133 scripts 321 downloads

plot3Drgl - Plotting Multi-Dimensional Data - Using 'rgl'

The 'rgl' implementation of plot3D functions.

Last updated 2 years ago

3.68 score 5 packages 120 scripts 2.7k downloads

AquaEnv - Integrated Development Toolbox for Aquatic Chemical Model Generation

Toolbox for the experimental aquatic chemist, focused on acidification and CO2 air-water exchange. It contains all elements to model the pH, the related CO2 air-water exchange, and aquatic acid-base chemistry for an arbitrary marine, estuarine or freshwater system. It contains a suite of tools for sensitivity analysis, visualisation, modelling of chemical batches, and can be used to build dynamic models of aquatic systems. As from version 1.0-4, it also contains functions to calculate the buffer factors.

Last updated 8 years ago

2.54 score 35 scripts 409 downloads

ecolMod - "A Practical Guide to Ecological Modelling - Using R as a Simulation Platform"

Figures, data sets and examples from the book "A practical guide to ecological modelling - using R as a simulation platform" by Karline Soetaert and Peter MJ Herman (2009). Springer. All figures from chapter x can be generated by "demo(chapx)", where x = 1 to 11. The R-scripts of the model examples discussed in the book are in subdirectory "examples", ordered per chapter. Solutions to model projects are in the same subdirectories.

Last updated 2 years ago

2.00 score 1 stars 8 scripts 311 downloads