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Plot the posterior distribution of the difference of means

plot_distrib.Rd

Display the posterior distribution of the difference of means between two groups for a specific peptide. If only one group is provide, the function display the posterior distribution of the mean for this specific group instead. The function provides additional tools to represent information to help inference regarding the difference between groups (reference at 0 on the x-axis, probability of group1 > group2 and conversely).

Usage

plot_distrib(
  sample_distrib,
  group1 = NULL,
  group2 = NULL,
  peptide = NULL,
  prob_CI = 0.95,
  show_prob = TRUE,
  mean_bar = TRUE,
  index_group1 = NULL,
  index_group2 = NULL
)

Arguments

sample_distrib

A data frame, typically coming from the sample_distrib() function, containing the following columns: Peptide, Group and Sample. This argument should contain the empirical posterior distributions to be displayed.

group1

A character string, corresponding to the name of the group for which we plot the posterior distribution of the mean. If NULL (default), the first group appearing in sample_distrib is displayed. If group2 is provided, the posterior difference of the groups is displayed instead.

group2

A character string, corresponding to the name of the group we want to compare to group1. If NULL (default), only the posterior distribution of the mean for group1 is displayed.

peptide

A character string, corresponding to the name of the peptide for which we plot the posterior distribution of the mean. If NULL (default), only the first appearing in sample_distrib is displayed.

prob_CI

A number, between 0 and 1, corresponding the level of the Credible Interval (CI), represented as side regions (in red) of the posterior distribution. The default value (0.95) display the 95% CI, meaning that the central region (in blue) contains 95% of the probability distribution of the mean.

show_prob

A boolean, indicating whether we display the label of probability comparisons between the two groups.

mean_bar

A boolean, indicating whether we display the vertical bar corresponding to 0 on the x-axis (when comparing two groups), of the mean value of the distribution (when displaying a unique group).

index_group1

A character string, used as the index of group1 in the legends. If NULL (default), group1 is used.

index_group2

A character string, used as the index of group2 in the legends. If NULL (default), group2 is used.

Value

Plot of the required posterior distribution.

Examples

TRUE
#> [1] TRUE