| is_value | R Documentation | 
is_value is a helper function for model_gamm,
calc_deriv,
test_interaction, and scoring.
It checks whether each element is a true value and not NA, NaN, NULL or
Inf when filtering tibbles for specific values. If the filtering variable (e.g.
p_val or edf) contains NAs, the respective rows are usually not excluded in
the requested subset or (when using the function split) excluded in both
TRUE/FALSE subsets.
is_value(x)
| x | An R object, which should be a numeric vector. | 
The function returns a logical vector with TRUE or FALSE for each element of x.
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