desc function

Making descriptive statistics

Makes descriptive statistics of a data frame according to a group covariate or not, can export the results

desc(
  data,
  vars,
  group = NULL,
  whole = TRUE,
  vars.labels = vars,
  group.labels = NULL,
  type.quanti = "mean",
  test.quanti = "param",
  test = TRUE,
  noquote = TRUE,
  justify = TRUE,
  digits = 2,
  file.export = NULL,
  language = "english"
)

Arguments

• data: data frame to describe in which we can find vars and group
• vars: vector of character strings of the covariates to describe
• group: character string, statistics created for each levels of this covariate
• whole: boolean, TRUE to add a column with the whole statistics when comparing groups (set to FALSE if group=NULL)
• vars.labels: vector of character string for sweeter names of covariates in the output
• group.labels: vector of character string for sweeter column names
• type.quanti: character string, "med" to compute median [Q1;Q3], "mean" to compute mean (sd), "mean_med" to compute both mean (sd) and median [Q1;Q3] or "med_mm", "mean_mm" or "mean_med_mm" to add (min;max)
• test.quanti: character string, "param" to compute parametric tests for quantitative covariates (t-test or ANOVA) or "nonparam" for non parametric tests (Wilcoxon test or Kruskal-Wallis test)
• test: boolean, TRUE to perform tests (FALSE if group is NULL): Khi-2 or Fisher exact test for categorical covariates, t-test/ANOVA or Wilcoxon/Kruskal-Wallis Rank Sum Test for numerical covariates
• noquote: boolean, TRUE to hide quotes when printing the table
• justify: boolean, TRUE to justify columns on right or left (FALSE if export)
• digits: number of digits of the statistics (mean, sd, median, min, max, Q1, Q3, %), p-values always have 3 digits
• file.export: character string, name of the XLS file exported
• language: character string, "french" or "english"

Returns

A matrix of the descriptive statistics

Examples

cgd$steroids=factor(cgd$steroids)
cgd$status=factor(cgd$status)
desc(cgd,vars=c("center","sex","age","height","weight","steroids","status"),group="treat")

Author(s)

Hugo Varet