Descriptive statistics by groups
Computes descriptive statistics by groups for a measure variable.
desc_statby(data, measure.var, grps, ci = 0.95)
data |
a data frame. |
measure.var |
the name of a column containing the variable to be summarized. |
grps |
a character vector containing grouping variables; e.g.: grps = c("grp1", "grp2") |
ci |
the percent range of the confidence interval (default is 0.95). |
A data frame containing descriptive statistics, such as:
length: the number of elements in each group
min: minimum
max: maximum
median: median
mean: mean
iqr: interquartile range
mad: median absolute deviation (see ?MAD)
sd: standard deviation of the mean
se: standard error of the mean
ci: confidence interval of the mean
range: the range = max - min
cv: coefficient of variation, sd/mean
var: variance, sd^2
# Load data
data("ToothGrowth")
# Descriptive statistics
res <- desc_statby(ToothGrowth, measure.var = "len",
grps = c("dose", "supp"))
head(res[, 1:10])Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.