This function calculates the polychoric correlations between pairs of variables
in a given data frame. It returns a data frame with the row and column names of
the variables, the polychoric correlation coefficient, and its standard error.
Usage
polycorr(data, varlist)
Value
data frame with polychoric correlation coefficients and standard errors
Arguments
data
data frame with "markname" and study names as column names.
varlist
character vector of study names to include in the meta-analysis.