umxFactor
A convenient version of mxFactor() supporting the common
case in which the factor levels are those in the variable.
umxFactor( x = character(), levels = NULL, labels = levels, exclude = NA, ordered = TRUE, collapse = FALSE, verbose = FALSE, sep = NA )
x |
A variable to recode as an mxFactor (see |
levels |
(default NULL). Like |
labels |
= levels (see |
exclude |
= NA (see |
ordered |
= TRUE By default return an ordered mxFactor |
collapse |
= FALSE (see |
verbose |
Whether to tell user about such things as coercing to factor |
sep |
If twin data are being used, the string that separates the base from twin index will try and ensure factor levels same across all twins. |
Other Data Functions:
noNAs(),
umxHetCor(),
umx_as_numeric(),
umx_cont_2_quantiles(),
umx_lower2full(),
umx_make_MR_data(),
umx_make_TwinData(),
umx_make_fake_data(),
umx_make_raw_from_cov(),
umx_polychoric(),
umx_polypairwise(),
umx_polytriowise(),
umx_read_lower(),
umx_read_prolific_demog(),
umx_rename(),
umx_reorder(),
umx_score_scale(),
umx_select_valid(),
umx_stack(),
umx
umxFactor(letters)
umxFactor(letters, verbose = TRUE) # report coercions
umxFactor(letters, ordered = FALSE) # non-ordered factor like factor(x)
# Dataframe example:
x = umx_factor(mtcars[,c("cyl", "am")], ordered = FALSE); str(x)
# =================
# = Twin example: =
# =================
data(twinData)
tmp = twinData[, c("bmi1", "bmi2")]
tmp$bmi1[tmp$bmi1 <= 22] = 22
tmp$bmi2[tmp$bmi2 <= 22] = 22
# remember to factor _before_ breaking into MZ and DZ groups
x = umxFactor(tmp, sep = ""); str(x)
xmu_check_levels_identical(x, "bmi", sep="")
# Simple example to check behavior
x = round(10 * rnorm(1000, mean = -.2))
y = round(5 * rnorm(1000))
x[x < 0] = 0; y[y < 0] = 0
jnk = umxFactor(x); str(jnk)
df = data.frame(x = x, y = y)
jnk = umxFactor(df); str(jnk)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.