List the methods that can be used with the rgcca function.
Examples
available_methods()
#> [1] "rgcca" "sgcca" "pca" "spca" "pls" "spls"
#> [7] "cca" "ifa" "ra" "gcca" "maxvar" "maxvar-b"
#> [13] "maxvar-a" "mfa" "mcia" "mcoa" "cpca-1" "cpca-2"
#> [19] "cpca-4" "hpca" "maxbet-b" "maxbet" "maxdiff-b" "maxdiff"
#> [25] "sabscor" "ssqcor" "ssqcov-1" "ssqcov-2" "ssqcov" "sumcor"
#> [31] "sumcov-1" "sumcov-2" "sumcov" "sabscov-1" "sabscov-2"