str2cov | R Documentation |
helper function to generate an expected covariance matrix from an ICED measurement structure and vector of variances. Not expected to be called directly, but used within sim_ICED
str2cov(structure, variances, e_label = "e")
structure |
data.frame describing the structure of the data, with each variable convering a design aspect - see example. Note: currently the first variable must be time and include a different value for each repeated measure. |
variances |
list of variances for each source of variance |
e_label |
sting label for error variance. defaults to "e" |
returns a matrix
struc <- data.frame(time = c("T1", "T2", "T3", "T4"), day = c("day1","day1","day2","day2"), session = c("ses1", "ses1","ses2", "ses3")) str2cov(struc, list(time = 10, day = 2, session = 1, e = 3))
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