MFOs {MFO}

Maximal Fat Oxidation calculation of multiple databases

Description

Maximal Fat Oxidation calculation of multiple databases

Usage

MFOs(
  from = c("folder", "files"),
  path,
  db_basal_name,
  db_MFO_name,
  db_graded_name,
  step_time,
  cv_var,
  author,
  VO2max = NULL,
  remove_rows = NULL,
  col_name_VO2 = "VO2",
  col_name_VCO2 = "VCO2",
  col_name_RER = "RER",
  col_name_HR = "HR",
  save_plot = TRUE,
  save_result = TRUE
)

Arguments

from

select or folder (basal, MFO and graded databases of the same participant are store in different files but in the same folder) or files (basal, MFO and graded databases of the same participant are store in one file but in different sheets)

path

path to the folder with the databases

db_basal_name

name given to the basal database, eg: basal_df

db_MFO_name

name given to the MFO database, eg: MFO_df

db_graded_name

name given to the graded database, eg: VO2max_df

step_time

how often the data was collected (in seconds).

cv_var

variable to estimate coefficient of variation. Can be: VO2, VCO2 or RER.

author

author to estimate MFO. Can be: Frayn or Jeukendrup.

VO2max

VO2max can be passed directly using this argument instead of use db_graded argument. Default set to NULL.

remove_rows

An integer (or a vector of integers) representing the position of the rows to delete

col_name_VO2

name given to the variable VO2 in the databases. Must be the same for all databases. Default set to "VO2"

col_name_VCO2

name given to the variable VCO2 in the databases. Must be the same for all databases. Default set to "VCO2"

col_name_RER

name given to the variable RER in the databases. Must be the same for all databases. Default set to "RER"

col_name_HR

name given to the variable HR in the databases. Must be the same for all databases. Default set to "HR"

save_plot

to save the plot or not. Default set to True.

save_result

to save the results in a .xlsx file or not. Default set to True.

Value

This function creates an .xlsx file in the working directory with the following variables:

• MFO_db: database used to create the MFO plot.

• MFO_plot: ggplot object with the MFO plot.

• MFO: Maximal fat oxidation.

• FAT_MAX: Intensity that elicits MFO.

• x_CHO: carbohydrates in basal metabolism.

• x_FAT: fat in basal metabolism.

• x_Kcal: Kcal in basal metabolism.

Examples

## Not run: 
# Get old working directory
oldwd <- getwd()

# Set temporary directory
setwd(tempdir())

# Create path to store databases
dir.create(paste(getwd(),"/MFO_databases", sep = ""))
# Get path to databases
path <- paste(getwd(),"/MFO_databases", sep = "")

# MFOs function
# "path" is the path to the databases
MFOs <- function(from = "folder",
                 path = path,
                 db_basal_name = "basal_df",
                 db_MFO_name = "MFO_df",
                 db_graded_name = "graded_df",
                 step_time = 20,
                 cv_var = "RER",
                 author = "Frayn",
                 VO2max = NULL,
                 remove_rows = NULL,
                 col_name_VO2 = "VO2",
                 col_name_VCO2 = "VCO2",
                 col_name_RER = "RER",
                 col_name_HR = "HR",
                 save_plot = TRUE,
                 save_result = TRUE)

# set user working directory
setwd(oldwd)

## End(Not run)