View source: R/get_var_array.R
get_var_array | R Documentation |
Generate a matrix with various lags from a variable in the dataframe
get_var_array( data, subj_var, var, time_var, lags, label_length = 1, label_output = FALSE )
data |
A data frame, data frame extension (e.g. a |
subj_var |
A character string referring to the variable that specifies the "subject" variable. |
var |
A character string referring to the variable that contains the variable values. |
time_var |
A character string referring to the variable that contains the time variable values (e.g. visit day, minutes, years). |
lags |
The length of each sliced sequence. |
label_length |
How many values after are considered to
be the label? Default to 1. If |
label_output |
logical. if |
If label_output
is FALSE
,
a matrix with the sliced sequences is returned.
If label_output
is TRUE
, a list with the matrix
and vector with the labels from the same variable is returned.
get_var_array(alsfrs_data, "subjid", "p2", "visdy", lags = 3, label_output = FALSE)
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