| 1 | cast_wrapper(X, row_var, col_var, value_var = NULL, aggregate_fun = "sum")
 | 
| X | The data set to cast | 
| row_var | The variable whose unique values will determine the rows. | 
| col_var | The variable whose unique values will determine the columns. | 
| value_var | The variable to use to fill in the cells of the wide matrix. | 
| aggregate_fun | The name of a function to use to summarize many elements with the same row_var / col_var identification. Must be one of | 
The wide version of X.
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