Convert list of imputation_list_single() objects to an imputation_list_df() object (i.e. a list of imputation_df() objects's)

Usage

convert_to_imputation_list_df(imputes, sample_ids)

Arguments

imputes

a list of imputation_list_single() objects

sample_ids

A list with 1 element per required imputation_df. Each element must contain a vector of "ID"'s which correspond to the imputation_single() ID's that are required for that dataset. The total number of ID's must by equal to the total number of rows within all of imputes$imputations

To accommodate for method_bmlmi() the impute_data_individual() function returns a list of imputation_list_single() objects with 1 object per each subject.

imputation_list_single() stores the subjects imputations as a matrix where the columns of the matrix correspond to the D of method_bmlmi(). Note that all other methods (i.e. methods_*()) are a special case of this with D = 1. The number of rows in the matrix varies for each subject and is equal to the number of times the patient was selected for imputation (for non-conditional mean methods this should be 1 per subject per imputed dataset).

This function is best illustrated by an example:

imputes = list(
    imputation_list_single(
        id = "Tom",
        imputations = matrix(
             imputation_single_t_1_1,  imputation_single_t_1_2,
             imputation_single_t_2_1,  imputation_single_t_2_2,
             imputation_single_t_3_1,  imputation_single_t_3_2
        )
    ),
    imputation_list_single(
        id = "Tom",
        imputations = matrix(
             imputation_single_h_1_1,  imputation_single_h_1_2,
        )
    )
)

sample_ids <- list(
    c("Tom", "Harry", "Tom"),
    c("Tom")
)

Then convert_to_imputation_df(imputes, sample_ids) would result in:

imputation_list_df(
    imputation_df(
        imputation_single_t_1_1,
        imputation_single_h_1_1,
        imputation_single_t_2_1
    ),
    imputation_df(
        imputation_single_t_1_2,
        imputation_single_h_1_2,
        imputation_single_t_2_2
    ),
    imputation_df(
        imputation_single_t_3_1
    ),
    imputation_df(
        imputation_single_t_3_2
    )
)

Note that the different repetitions (i.e. the value set for D) are grouped together sequentially.