Package 'rvec'

Tools for working with random draws from a distribution, eg draws from a posterior distribution in a Bayesian analysis.

Details

An rvec holds multiple draws, but wherever possible behaves like an ordinary R vector. For instance, if x is an rvec holding 1000 draws from a distribution, then 2 * x returns a new rvec where each draw has been multiplied by 2.

To summarise across draws, use a function starting with draws. For instance, to calculate a credible interval, use draws_ci().

Functions

Creating rvecs

• rvec() Class depends on input

• rvec_dbl() Doubles

• rvec_int() Integers

• rvec_lgl() Logical

• rvec_chr() Character

• collapse_to_rvec() Data in data frame

• new_rvec() Blanks

Manipulating rvecs

• if_else_rvec() if_else() where condition is rvec

• map_rvec() map() for rvecs

• extract_draw() Single draw from rvec

Probability distributions

• dbeta_rvec() Beta

• dbinom_rvec() Binomial

• dcauchy_rvec() Cauchy

• dchisq_rvec() Chi-square

• dexp_rvec() Exponential

• df_rvec() F

• dgamma_rvec() Gamma

• dgeom_rvec() Geometric

• dhyper_rvec() Hypergeometric

• dlnorm_rvec() Lognormal

• dmultinom() Multinomial

• dnbinom_rvec() Negative binomial

• dnorm_rvec() Normal

• dpois_rvec() Poisson

• dt_rvec() Student's T

• dunif_rvec() Uniform

• dweibull_rvec() Weibull

Summarizing across draws

• draws_all() All draws

• draws_any() Any draws

• draws_min() Minimum draw

• draws_max() Maximum draw

• draws_median() Median draw

• draws_mean() Mean draw

• draws_mode() Modal draw

• draws_ci() Credible intervals

• draws_quantile() Quantiles

• draws_fun() Arbitrary function

• n_draw() Number of draws

Coercion, classes

• as_list_col() Rvec or matrix to list

• expand_from_rvec() Inverse of collapse_to_rvec()

• is_rvec() Object an rvec?

Weighted summaries

• weighted_mad() Weighted mean absolute deviation

• weighted_mean() Weighted mean

• weighted_median() Weighted median

• weighted_sd() Weighted standard deviation

• weighted_var() Weighted variances

Datasets

• divorce() Divorce rates

• reg_post() Regression coefficients

Packages with similar functionality

• rv

• posterior

See also

Useful links:

• https://bayesiandemography.github.io/rvec/

• https://github.com/bayesiandemography/rvec

• Report bugs at https://github.com/bayesiandemography/rvec/issues

Author

Maintainer: John Bryant john@bayesiandemography.com

Other contributors:

• Bayesian Demography Limited [copyright holder]