# TestFunctions v0.2.0

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## Test Functions for Simulation Experiments and Evaluating Optimization and Emulation Algorithms

Test functions are often used to test computer code.
They are used in optimization to test algorithms and in
metamodeling to evaluate model predictions. This package provides
test functions that can be used for any purpose.
Some functions are taken from <https://www.sfu.ca/~ssurjano>, but
their R code is not used.

## Readme

# TestFunctions

## Why should I use it?

This R package provides functions for various surfaces that can be used for testing of models, algorithms, etc. For example, if you want to compare how well a neural network does compared to a random forest, you can take data from one of these test functions to train and test them.

## How do I use it?

Each of the test functions is called like any other function. The first argument, `x`

, should be a vector representing one point or a matrix that has points in its rows. This can cause problems if you are using a 1-dimensional function and pass in a vector of values. Instead you should pass them in as a matrix with a single column, or vectorize the function.

```
set.seed(0)
library(TestFunctions)
branin(runif(2))
#> [1] 9.476405
branin(matrix(runif(20), ncol=2))
#> [1] 24.119600 71.180268 18.374071 9.839029 36.607437 72.884496
#> [7] 196.302169 25.185022 13.059216 27.129463
```

```
ContourFunctions::cf(banana)
```

## How do I get it?

Install it like any other package with `install.packages`

.

```
install.packages("TestFunctions")
# Or the the development version from GitHub:
# install.packages("devtools")
devtools::install_github("CollinErickson/TestFunctions")
```

## Functions in TestFunctions

Name | Description | |

TF_beale | TF_beale: Beale function for evaluating a single point. | |

TF_detpep8d | TF_detpep8d: detpep8d function for evaluating a single point. | |

TF_welch | TF_welch: Welch function for evaluating a single point. | |

TF_wingweight | TF_wingweight: Wing weight function for evaluating a single point. | |

TF_RoosArnold | TF_RoosArnold: Roos & Arnold (1963) function for evaluating a single point. | |

TF_ackley | TF_ackley: Ackley function for evaluating a single point. | |

TF_hartmann | TF_hartmann: hartmann function for evaluating a single point. | |

TF_hump | TF_hump: Hump function for evaluating a single point. | |

TF_rastrigin | TF_rastrigin: Rastrigin function for evaluating a single point. | |

TF_robotarm | TF_robotarm: Robot arm function for evaluating a single point. | |

TF_morris | TF_morris: morris function for evaluating a single point. | |

TF_piston | TF_piston: Piston simulation function for evaluating a single point. | |

TF_quad_peaks | TF_quad_peaks: quad_peaks function for evaluating a single point. | |

TF_quad_peaks_slant | TF_quad_peaks_slant: quad_peaks_slant function for evaluating a single point. | |

branin | Test function. | |

TF_GoldsteinPriceLog | TF_GoldsteinPrice: Goldstein Price function for evaluating a single point | |

TF_branin | Base test function. | |

TF_michalewicz | TF_michalewicz: Michalewicz function for evaluating a single point. | |

TF_Gfunction | TF_Gfunction: G-function for evaluating a single point. | |

TF_GoldsteinPrice | TF_GoldsteinPrice: Goldstein Price function for evaluating a single point | |

TF_easom | TF_easom: Easom function for evaluating a single point. | |

TF_griewank | TF_griewank: Griewank function for evaluating a single point. | |

RFF | Evaluate an RFF (random wave function) at given input | |

RFF_get | Create a new RFF function | |

TF_levy | TF_levy: Levy function for evaluating a single point. | |

TF_linkletter_nosignal | TF_linkletter_nosignal: Linkletter (2006) no signal function for evaluating a single point. | |

add_null_dims | add_null_dims: Add null dimensions to another function. | |

add_zoom | add_zoom: Zoom in on region of another function. | |

nsin | Wave functions | |

add_linear_terms | add_linear_terms: Add linear terms to another function. | |

add_noise | add_noise: Adds noise to any function | |

numHessian | Create function calculating the numerical hessian | |

standard_test_func | Create a standard test function. | |

numGrad | Create function calculating the numerical gradient | |

TF_moon_high | TF_moon_high: Moon (2010) high-dimensional function for evaluating a single point. | |

No Results! |

## Vignettes of TestFunctions

Name | ||

AnIntroductiontoTestFunctions.Rmd | ||

An_Introduction_to_TestFunctions.R | ||

An_Introduction_to_TestFunctions.html | ||

No Results! |

## Last month downloads

## Details

Type | Package |

License | GPL-3 |

LazyData | TRUE |

RoxygenNote | 6.0.1 |

VignetteBuilder | knitr |

NeedsCompilation | no |

Packaged | 2017-05-09 12:40:28 UTC; cbe117 |

Repository | CRAN |

Date/Publication | 2017-05-09 21:25:06 UTC |

suggests | ContourFunctions , knitr , numDeriv , rmarkdown |

Contributors | Collin Erickson |

#### Include our badge in your README

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```