Normalize within-group data
Norms the data within specified groups in a data frame; it normalizes each subject (identified by idvar) so that they have the same mean, within each group specified by betweenvars.
normDataWithin(data = NULL, idvar, measurevar,
betweenvars = NULL, na.rm = FALSE, .drop = TRUE)data |
a data frame. |
idvar |
the name of a column that identifies each subject (or matched subjects) |
measurevar |
the name of a column that contains the variable to be summariezed |
betweenvars |
a vector containing names of columns that are between-subjects variables |
na.rm |
a boolean that indicates whether to ignore NA's |
.drop |
should combinations of variables that do not appear in the input data be preserved (FALSE) or dropped (TRUE, default) |
a data frame with normalized data
http://www.cookbook-r.com/Graphs/Plotting_means_and_error_bars_(ggplot2)
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