Fischbein_wt: Weight data across time.

In umx: Structural Equation Modeling and Twin Modeling in R

Weight data across time.

Description

A dataframe containing correlations of weight for 66 females measured 6 times at 6-month intervals.

Usage

data(Fischbein_wt)

Format

A 6*6 correlation matrix based on n = 66 female subjects.

Details

• Weight1: Weight at time 1 (t0)

• Weight2: Weight at time 2 (t0 + 6 months)

• Weight3: Weight at time 3 (t0 + 12 months)

• Weight4: Weight at time 4 (t0 + 18 months)

• Weight5: Weight at time 5 (t0 + 24 months)

• Weight6: Weight at time 6 (t0 + 32 months)

Created as follows:

Fischbein_wt = umx_read_lower(file = "", diag = TRUE, names = paste0("Weight", 1:6), ensurePD= TRUE)
1.000
0.985	1.000
0.968	0.981	1.000
0.957	0.970	0.985	1.000
0.932	0.940	0.964	0.975	1.000
0.890	0.897	0.927	0.949	0.973	1.000

References

Fischbein, S. (1977). Intra-pair similarity in physical growth of monozygotic and of dizygotic twins during puberty. Annals of Human Biology, 4. 417-430. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1080/03014467700002401")}

See Also

Other datasets: GFF, docData, iqdat, umx, us_skinfold_data

Examples

## Not run: 
data(Fischbein_wt) # load the data
str(Fischbein_wt) # data.frame
as.matrix(Fischbein_wt) # convert to matrix

## End(Not run)

umx documentation built on May 29, 2024, 5:40 a.m.