umx (version 1.9.1)

umx_read_lower: Read lower-triangle of data matrix from console or file

Description

umx_read_lower will read a lower triangle of data, either from the console, or from file, and return a full matrix, optionally coerced to positive definite. This is useful, especially when copying data from a paper that includes just the lower triangle of a correlation matrix.

Usage

umx_read_lower(file = "", diag = TRUE, names = as.character(paste("X",
  1:n, sep = "")), ensurePD = FALSE)

Arguments

file

Path to a file to read (Default "" will read from user input)

diag

Whether the data include the diagonal. Defaults to TRUE

names

The default names for the variables. Defaults to as.character(paste("X", 1:n, sep=""))

ensurePD

Whether to coerce the resultant matrix to positive definite (Defaults to FALSE)

Value

- matrix

References

- https://github.com/tbates/umx, https://tbates.github.io

See Also

Other Data Functions: umxCovData, umxFactor, umxHetCor, umxPadAndPruneForDefVars, umx_as_numeric, umx_cont_2_quantiles, umx_cov2raw, umx_long2wide, umx_lower2full, umx_make_MR_data, umx_make_TwinData, umx_make_bin_cont_pair_data, umx_make_fake_data, umx_merge_CIs, umx_reorder, umx_residualize, umx_round, umx_scale_wide_twin_data, umx_scale, umx_swap_a_block, umx_wide2long, umx

Examples

# NOT RUN {
require(umx) # for umxRAM
# }
# NOT RUN {
df = umx_read_lower(file = "", diag = F, ensurePD=TRUE)
0.38
0.86	0.30
0.42	0.12	0.27
0.66	0.21	0.38	0.18
0.80	0.13	0.50	0.25	0.43
0.19	0.11	0.19	0.12	-0.06	0.22
0.27	0.09	0.33	0.05	-0.04	0.28	.73
0.52	0.17	0.38	0.37	0.39	0.44	0.18	0.13

IQtests = c("brainstorm", "matrix", "moral", "shopping", "typing")
n       = c("C", IQtests, "avgIQ", "maxIQ", "video")

dimnames(df) = list(n,n)

m1 = umxRAM("wooley", data = mxData(df, type="cov", numObs = 90),
	umxPath("g", to = IQtests),
	umxPath(var = "g", fixedAt=1),
	umxPath(var = IQtests)
)
summary(m1)
# }