AMR/inst/tinytest/test-pca.R

# ==================================================================== #
# TITLE                                                                #
# AMR: An R Package for Working with Antimicrobial Resistance Data     #
#                                                                      #
# SOURCE                                                               #
# https://github.com/msberends/AMR                                     #
#                                                                      #
# CITE AS                                                              #
# Berends MS, Luz CF, Friedrich AW, Sinha BNM, Albers CJ, Glasner C    #
# (2022). AMR: An R Package for Working with Antimicrobial Resistance  #
# Data. Journal of Statistical Software, 104(3), 1-31.                 #
# https://doi.org/10.18637/jss.v104.i03                                #
#                                                                      #
# Developed at the University of Groningen and the University Medical  #
# Center Groningen in The Netherlands, in collaboration with many      #
# colleagues from around the world, see our website.                   #
#                                                                      #
# This R package is free software; you can freely use and distribute   #
# it for both personal and commercial purposes under the terms of the  #
# GNU General Public License version 2.0 (GNU GPL-2), as published by  #
# the Free Software Foundation.                                        #
# We created this package for both routine data analysis and academic  #
# research and it was publicly released in the hope that it will be    #
# useful, but it comes WITHOUT ANY WARRANTY OR LIABILITY.              #
#                                                                      #
# Visit our website for the full manual and a complete tutorial about  #
# how to conduct AMR data analysis: https://msberends.github.io/AMR/   #
# ==================================================================== #

resistance_data <- structure(list(
  order = c("Bacillales", "Enterobacterales", "Enterobacterales"),
  genus = c("Staphylococcus", "Escherichia", "Klebsiella"),
  AMC = c(0.00425, 0.13062, 0.10344),
  CXM = c(0.00425, 0.05376, 0.10344),
  CTX = c(0.00000, 0.02396, 0.05172),
  TOB = c(0.02325, 0.02597, 0.10344),
  TMP = c(0.08387, 0.39141, 0.18367)
),
class = c("grouped_df", "tbl_df", "tbl", "data.frame"),
row.names = c(NA, -3L),
groups = structure(list(
  order = c("Bacillales", "Enterobacterales"),
  .rows = list(1L, 2:3)
),
row.names = c(NA, -2L),
class = c("tbl_df", "tbl", "data.frame"),
.drop = TRUE
)
)
pca_model <- pca(resistance_data)
expect_inherits(pca_model, "pca")

pdf(NULL) # prevent Rplots.pdf being created

if (AMR:::pkg_is_available("ggplot2")) {
  ggplot_pca(pca_model, ellipse = TRUE)
  ggplot_pca(pca_model, arrows_textangled = FALSE)
}

if (AMR:::pkg_is_available("dplyr", min_version = "1.0.0", also_load = TRUE)) {
  resistance_data <- example_isolates %>%
    group_by(
      order = mo_order(mo),
      genus = mo_genus(mo)
    ) %>%
    summarise_if(is.sir, resistance, minimum = 0)
  pca_result <- resistance_data %>%
    pca(AMC, CXM, CTX, CAZ, GEN, TOB, TMP, "SXT")
  expect_inherits(pca_result, "prcomp")

  if (AMR:::pkg_is_available("ggplot2")) {
    ggplot_pca(pca_result, ellipse = TRUE)
    ggplot_pca(pca_result, ellipse = FALSE, arrows_textangled = FALSE, scale = FALSE)
  }
}