Package 'nichetools'

Title: Complementary Package to 'nicheROVER' and 'SIBER'
Description: Provides functions complementary to packages 'nicheROVER' and 'SIBER' allowing the user to extract Bayesian estimates from data objects created by the packages 'nicheROVER' and 'SIBER'. Please see the following publications for detailed methods on 'nicheROVER' and 'SIBER' Hansen et al. (2015) <doi:10.1890/14-0235.1>, Jackson et al. (2011) <doi:10.1111/j.1365-2656.2011.01806.x>, and Layman et al. (2007) <doi:10.1890/0012-9658(2007)88[42:CSIRPF]2.0.CO;2>, respectfully.
Authors: Benjamin L. Hlina [aut, cre]
Maintainer: Benjamin L. Hlina <[email protected]>
License: CC0
Version: 0.3.2
Built: 2024-10-01 06:49:51 UTC
Source: CRAN

Help Index

create comparisons

Description

Creates a list with all of the comparisons needed to create Bayesian and maximum-likelihood estimates for proportion of niche similarities.

Usage

create_comparisons(data, comparison = c("within", "among"))

Arguments

data

a data.frame that is the names of the community and group names
comparison

a characterthat is either "within" or "among" indicating whether the comparisons are within a community and between groups or among communities for the same groups.

Examples

# ---- load siber ----
library(SIBER)

# ---- create community names data frame ----
# uncomment to use
# str(demo.siber.data.2)

demo.siber.data.2$group_name <- as.factor(demo.siber.data.2$group)

demo.siber.data.2$group <- as.numeric(demo.siber.data.2$group_name) |>
as.character()

demo.siber.data.2$community_names <- as.factor(demo.siber.data.2$community)

demo.siber.data.2$community <- as.numeric(demo.siber.data.2$community_names) |>
as.character()

cg_names <- demo.siber.data.2 |>
dplyr::distinct(community, group, community_names, group_name)

# ---- create comparsions ----
create_comparisons(cg_names,
                  comparison = "within")

extract maximum-likelihood estimates for group metrics

Description

Extract group metrics within each community from a matrix object that is produced by groupMetricsML() function from SIBER. These metrics are the following the convex hull total area (TA), Standard Ellipse Area (SEA), and the corresponding small sample size corrected version SEAc based on the maximum likelihood estimates of the means and covariance matrices of each group.

Usage

extract_group_metrics(data = NULL, community_df = NULL, data_format = NULL)

Arguments

data

a matrix produced by the function groupMetricsML() in the package SIBER.
community_df

a four column data frame. One of the columns has to be named community and the data in the column will be numeric as a character string(e.g., ⁠"1", "2", "3"⁠). This is the order of the community names and will be used to join the actual community names to the correct data. These are the same class and values required by the function, createSiberObject() from SIBER. The second column will be the names of the groups that are needed to supply required by the function, createSiberObject() from SIBER. The third and fourth columns contains the actual names of the communities and groups the user is working with (e.g., "region", "common_name").
data_format

a character string that decides whether the returned object is in long or wide format. Default is "long", with the alternative supplied being "wide".

Value

A tibble containing four rows when data_format is set to its default which is long. These four rows are the following, community, the_name_of_the_communities, metric and post_est.

Examples

library(SIBER)

# ---- create community names data frame ----
# uncomment to use
# str(demo.siber.data.2)

demo.siber.data.2$group_name <- as.factor(demo.siber.data.2$group)

demo.siber.data.2$group <- as.numeric(demo.siber.data.2$group_name) |>
as.character()

demo.siber.data.2$community_name <- as.factor(demo.siber.data.2$community)

demo.siber.data.2$community <- as.numeric(demo.siber.data.2$community_name) |>
as.character()

cg_name <- demo.siber.data.2 |>
dplyr::distinct(community, group, community_name, group_name)

# ---- create comparsions ----

demo.siber.data.2 <- demo.siber.data.2[,1:4]

siber_example <- createSiberObject(demo.siber.data.2)

# extract group metrics
group_ml <- groupMetricsML(siber_example)

group_convert <- extract_group_metrics(data = group_ml,
                                community_df = cg_name)

extract Layman metrics

Description

Extract Bayesian estimates for the following six layman metrics, δ13\delta^{13}C range, δ15\delta^{15}N range, total area (TA), distance to centroid (CD), distance to the nearest neighbour (NND), and the standard deviation of the distance to the nearest neighbour (SDNND) from data objects created by SIBER. To learn more about the following metrics please review Layman et al. (2008).

Usage

extract_layman(
  data,
  type = NULL,
  community_df = NULL,
  data_format = NULL,
  isotope_x = NULL,
  isotope_y = NULL,
  element_x = NULL,
  element_y = NULL
)

Arguments

data

a list created by the function bayesianLayman() from the package SIBER.
type

a character that is either "bay" or "ml" which indicates whether the community metrics to be extracted are from a Bayesian analysis or a maximum-likelihood.
community_df

a two column data frame. One of the columns has to be named community and the data in the column will be numerics as a character string(e.g., ⁠"1", "2", "3"⁠). This is the order of the community names and will be used to join the actual community names to the correct data. These are the same class and values required by the function, createSiberObject() from SIBER. The second column contains the actual names of the communities that the user is working with (e.g., "region").
data_format

a character string that decides whether the returned object is in long or wide format. Default is "long", with the alternative supplied being "wide".
isotope_x

a numeric that will be used in the labeling processes for the range of the x. Default is 13 (e.g., δ\delta^13 C). This will create a column called labels, that will only be created when data_format is set to long.
isotope_y

a numeric that will be used in the labeling processes for the range of the y isotope. Default is 15 (e.g., δ\delta^15 N). #' This will create a column called labels, that will only be created when data_format is set to long.
element_x

a character that will be used in the labeling process for the range of the x isotope. Default is C (e.g., δ\delta^13 C). This will create a column called labels, that will only be created when data_format is set to long.
element_y

a character that will be used in the labeling process for the range of the y isotope. Default is N (e.g., δ\delta^13 N). #' This will create a column called labels, that will only be created when data_format is set to long.

Value

A tibble containing four rows when data_format is set to its default which is long. These four rows are the following, community, the_name_of_the_communities, metric and post_est.

See Also

SIBER::bayesianLayman() and SIBER::createSiberObject()

Examples

library(SIBER)

# ---- bring in SIBER demo data ----
# uncomenet to use
# str(demo.siber.data)

# ---- create community names data frame ----
# uncomment to use
# str(demo.siber.data.2)

demo.siber.data.2$group_name <- as.factor(demo.siber.data.2$group)

demo.siber.data.2$group <- as.numeric(demo.siber.data.2$group_name) |>
as.character()

demo.siber.data.2$community_names <- as.factor(demo.siber.data.2$community)

demo.siber.data.2$community <- as.numeric(demo.siber.data.2$community_names) |>
as.character()
c_names <- demo.siber.data.2 |>
dplyr::distinct(community, community_names)


demo.siber.data_2 <- demo.siber.data.2[,1:4]
# ---- create the siber object ----
siber.example <- createSiberObject(demo.siber.data_2)

# ---- view Bayesian estimates of mu and sigma produced by SIBER ---
# uncomment to use
# str(post_sam_siber)

# ---- extract posterior estimates of mu -----

mu_post <- extractPosteriorMeans(siber.example, post_sam_siber)

# ---- Bayesian estimates of layman metrics using SIBER ----

layman_b <- bayesianLayman(mu.post = mu_post)

# ---- use nichetools to extract Bayesian estimates of Layman metrics ----

layman_be <- extract_layman(layman_b, community_df = c_names)

layman_be

extract μ\mu

Description

Extract Bayesian estimates of μ\mu from data objects created by nicheROVER or SIBER.

Usage

extract_mu(
  data,
  pkg = NULL,
  isotope_names = NULL,
  data_format = NULL,
  community_df = NULL
)

Arguments

data

a list created by the function niw.post() or siberMVN() in the package nicheROVER or SIBER, respectfully.
pkg

a character string that is the name of the package that you're using. Defaults to "nicheROVER". Alternatively the user can supply the argument with "SIBER".
isotope_names

is a vector of character string used change the column name of isotopes used in the analysis. Defaults to c("d13c", "d15n").
data_format

a character string that decides whether the returned object is in long or wide format. Default is "long", with the alternative supplied being "wide".
community_df

a four column data frame. One of the columns has to be named community and the data in the column will be numeric as a character string(e.g., ⁠"1", "2", "3"⁠). This is the order of the community names and will be used to join the actual community names to the correct data. These are the same class and values required by the function, createSiberObject() from SIBER. The second column will be the names of the groups that are needed to supply required by the function, createSiberObject() from SIBER. The third and fourth columns contains the actual names of the communities and groups the user is working with (e.g., "region", "common_name").

Value

Returns a tibble of extracted estimates of μ\mu created by the function niw.post() or siberMVN() in the packages nicheROVER. and SIBER.

The tibble will contain five columns in the following order, metric, sample_name, sample_number, and the names of the isotope columns supplied to niw.post() or siberMVN() (e.g., d13c and d15n ).

See Also

nicheROVER::niw.post() and SIBER::siberMVN()

Examples

extract_mu(
data = niw_fish_post
)

library(SIBER)

# ---- create community names data frame ----
# uncomment to use
# str(demo.siber.data.2)

demo.siber.data.2$group_name <- as.factor(demo.siber.data.2$group)

demo.siber.data.2$group <- as.numeric(demo.siber.data.2$group_name) |>
as.character()

demo.siber.data.2$community_name <- as.factor(demo.siber.data.2$community)

demo.siber.data.2$community <- as.numeric(demo.siber.data.2$community_name) |>
as.character()

cg_name <- demo.siber.data.2 |>
dplyr::distinct(community, group, community_name, group_name)


extract_mu(
data = post_sam_siber,
pkg = "SIBER",
community_df = cg_name
)

extract niche size

Description

Extract niche size based on elliptical niche region of Bayesian estimates of sigma created by function niw.post() or siberEllipses() in the package nicheROVER or SIBER, respectfully. For nicheROVER this function is a wrapper around nicheROVER::niche.size.

Usage

extract_niche_size(
  data,
  pkg = NULL,
  name = NULL,
  prob = NULL,
  community_df = NULL
)

Arguments

data

a list or matrix created by the function niw.post() or siberEllipses() in the package nicheROVER or SIBER, respectfully.
pkg

a character string that is the name of the package that you're using. Defaults to "nicheROVER". Alternatively the user can supply the argument with "SIBER".
name

a character string that will be assigned as the column name for groups. Default is sample_name. Only to be used when pkg is set to "nicheROVER".
prob

a numeric bound by 0 and 1 indicating the probabilistic niche size. Default is 0.95. Only to be used when pkg is set to "nicheROVER".
community_df

a four column data frame. One of the columns has to be named community and the data in the column will be numeric as a character string(e.g., ⁠"1", "2", "3"⁠). This is the order of the community names and will be used to join the actual community names to the correct data. These are the same class and values required by the function, createSiberObject() from SIBER. The second column will be the names of the groups that are needed to supply required by the function, createSiberObject() from SIBER. The third and fourth columns contains the actual names of the communities and groups the user is working with (e.g., "region", "common_name").

Value

if pkg is set to "nicheROVER" then a tibble containing three rows, sample_name, id, and niche_size is returned.

See Also

nicheROVER::niche.size(), nicheROVER::niw.post(), SIBER::siberEllipses(), and SIBER::createSiberObject()

Examples

extract_niche_size(data = niw_fish_post)

extract overlap

Description

Extract Bayesian estimates of similarities among groups produced by the following function overlap() in the package nicheROVER.

Usage

extract_overlap(data, name_a = NULL, name_b = NULL)

Arguments

data

a array object containing matrices created by the function overlap() in the package nicheROVER.
name_a

character string to supply for the first sample_name used in overlap(). Defaults to "sample_name_a".
name_b

character string to supply for the second sample_name used in overlap(). Defaults to "sample_name_b".

Value

A tibble containing five rows, sample_name_a, id, sample_name_b, sample_number, and niche_overlap.

See Also

nicheROVER::overlap()

Examples

extract_overlap(data = over_stat)

extract Σ\Sigma

Description

Extract Bayesian estimates of Σ\Sigma from data objects created by nicheROVER or SIBER.

Usage

extract_sigma(
  data,
  pkg = NULL,
  isotope_n = NULL,
  isotope_names = NULL,
  data_format = NULL
)

Arguments

data

a list created by the function niw.post() or siberMVN() in the package nicheROVER or SIBER, respectfully.
pkg

a character string that is the name of the package that you're using. Defaults to "nicheROVER". Alternatively the user can supply the argument with "SIBER".
isotope_n

a numeric either 2 or 3 that is the number of isotopes used in the anlsysis. Will default to 2.
isotope_names

is a vector of character string used change the column name of isotopes used in the analysis. Defaults to c("d13c", "d15n").
data_format

a character string that decides whether the returned object is in long or wide format. Default is "wide", with the alternative supplied being "long".

Value

Returns a tibble of extracted estimates of Σ\Sigma created by the function niw.post() or siberMVN() in the packages nicheROVER. and SIBER.

The returned object will contain five columns in the following order when data_format is set to "wide", metric, id, sample_name, isotope, sample_number, and the posterior sample for Σ\Sigma (e.g., d13c and d15n).

See Also

nicheROVER::niw.post() and SIBER::siberMVN()

Examples

extract_sigma(
data = niw_fish_post
)

extract_sigma(
data = post_sam_siber,
pkg = "SIBER"
)

extract similarities

Description

Extract niche similarities from objects created by {SIBER}.

Usage

extract_similarities(data, type = c("bay", "ml"), community_df = NULL)

Arguments

data

a list of results from either maxLikOverlap() or bayesianOverlap().
type

a character that is either "bay" or "ml" which indicates whether the community metrics to be extracted are from a Bayesian analysis or a maximum-likelihood.
community_df

a four column data frame. One of the columns has to be named community and the data in the column will be numeric as a character string(e.g., ⁠"1", "2", "3"⁠). This is the order of the community names and will be used to join the actual community names to the correct data. These are the same class and values required by the function, createSiberObject() from SIBER. The second column will be the names of the groups that are needed to supply required by the function, createSiberObject() from SIBER. The third and fourth columns contains the actual names of the communities and groups the user is working with (e.g., "region", "common_name").

Examples

library(purrr)
library(SIBER)

# ---- create community names data frame ----
# uncomment to use
# str(demo.siber.data.2)

demo.siber.data.2$group_name <- as.factor(demo.siber.data.2$group)

demo.siber.data.2$group <- as.numeric(demo.siber.data.2$group_name) |>
as.character()

demo.siber.data.2$community_name <- as.factor(demo.siber.data.2$community)

demo.siber.data.2$community <- as.numeric(demo.siber.data.2$community_name) |>
as.character()

cg_name <- demo.siber.data.2 |>
dplyr::distinct(community, group, community_name, group_name)

# ---- create comparsions ----
cg_names_within_c <- create_comparisons(cg_name,
                                        comparison = "within")

demo.siber.data.2 <- demo.siber.data.2[,1:4]

siber_example <- createSiberObject(demo.siber.data.2)

ml_within_overlap <- cg_names_within_c |>
map(~ maxLikOverlap(.x$cg_1, .x$cg_2, siber_example,
p.interval = NULL, n = 100), .progress = TRUE)

ml_95_within_com <- extract_similarities(ml_within_overlap, type = "ml",
community_df = cg_name)

A data.frame containing posterior estimates of μ\mu

Description

Posterior estimates of μ\mu using fish data set from nicheROVER, using Normal-Inverse-Wishart (NIW) priors.

Usage

mu_est_long

Format

data.frame containing 8,000 rows and 7 variables

metric

name of the metric extracted from niw.post()

species

species abbreviation

sample_number

sample number from 1-1000

isotope

column with isotope name

mu_est

estimate of mu produced from niw.post()

element

isotopic element used in labelling

neutron

neutron number used in labelling

Create ellipses based on Bayesian estimates of μ\mu and Σ\Sigma

Description

This function allows the user to supply Bayesian estimates of μ\mu and Σ\Sigma to create estimated Bayesian ellipse for niche region.

Usage

niche_ellipse(
  dat_mu,
  dat_sigma,
  isotope_a = NULL,
  isotope_b = NULL,
  p_ell = NULL,
  random = NULL,
  set_seed = NULL,
  n = NULL,
  message = TRUE
)

Arguments

dat_mu

a data.frame containing μ\mu Bayesian estimates. This data.frame needs to be in long format with each μ\mu estimate for each isotope stacked on top of each other. This can be produced using extract_mu().
dat_sigma

a data.frame containing Σ\Sigma Bayesian estimates. This data.frame needs be in wide format, that is Σ\Sigma (covariance) matrices stacked on top of each other. See example of how to convert to wide format. This can be produced using extract_sigma().
isotope_a

character string that is the column name of the first isotope used in dat_sigma. Defaults to "d13c".
isotope_b

character string that is the column name of the second isotope used in dat_sigma. Defaults to "d15n".
p_ell

is the confidence interval of each ellipse estimate. Default is 0.95 (i.e., 95% confidence interval). This value is bound by 0 and 1 and has to be a numeric.
random

logical value indicating whether or not to randomly sample posterior distributions for μ\mu and Σ\Sigma to create a sub-sample of ellipse. Default is TRUE.
set_seed

numerical value to set seed for random sampling. Default is a random value. To consistently sample the same subsample, please supply a numerical value (e.g., 4). It is highly suggested to use set_seed to make the function results when randomly sampling reproducible.
n

numerical value that controls the number of random samples. Default is 10.
message

control whether the time processing is displayed after the end of the function. Default is TRUE.

Value

A tibble containing, sample_name, sample_number, and the isotopes that were used in the estimation of ellipse (i.e., and d13c and d15n).

See Also

nicheROVER::niw.post(), SIBER::siberMVN(), extract_mu(), and extract_sigma()

Examples

niche_ellipse(dat_mu = mu_est_long,
              dat_sigma = sigma_est_wide)

A list of the posterior estimates of μ\mu and Σ\Sigma from {nicheROVER}

Description

Posterior estimates of μ\mu and Σ\Sigma using the fish data set from nicheROVER, using Normal-Inverse-Wishart (NIW) priors. This list is produced using the function niw.post() from nicheROVER.

Usage

niw_fish_post

Format

A list with elements μ\mu and Σ\Sigma of sizes c(nsamples, length(lambda)) and c(dim(Psi)).

A data.frame containing the estimates of percentage of overlap among groups

Description

Estimates of the percentage of overlap among example species used in nicheROVER.

Usage

over_stat

Format

A arraycontaining matrices of the percent overlap for each group used in Bayesian estimates of μ\mu and Σ\Sigma using Normal-Inverse-Wishart (NIW) priors calculated in niw.post().

A list of the posterior estimates of μ\mu and Σ\Sigma from {SIBER}

Description

Posterior estimates of μ\mu and Σ\Sigma using the demo.siber.data.2 data set from SIBER. This list is produced using the function siberMVN() from SIBER.

Usage

post_sam_siber

Format

A list with estimates of μ\mu and Σ\Sigma for each species and group.

A data.frame containing posterior estimates of Σ\Sigma

Description

Posterior estimates of Σ\Sigma using fish data set from nicheROVER, using Normal-Inverse-Wishart (NIW) priors

Usage

sigma_est_wide

Format

data.frame containing 8,000 rows and 6 variables

metric

name of the metric extracted from niw.post()

species

species abbreviation

isotope

column with isotope name

sample_number

sample number from 1-1000

d15n

estimate of Σ\Sigma for d15n produced from niw.post()

d13c

estimate of Σ\Sigma for d13c produced from niw.post()