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