Converting matrix of responses into a long-form data frame and incorporating covariates, if supplied.
mat2df.RdConverting matrix of responses into a long-form data frame and incorporating covariates, if supplied.
Arguments
- mat
matrix of responses to be clustered
- xr.df
optional data frame of covariates corresponding to the rows of
mat. Each row ofxr.dfcorresponds to one row ofmat, and each column ofxr.dfis a covariate.- xc.df
optional data frame of covariates corresponding to the columns of
mat. Each row ofxc.dfcorresponds to one column ofmat, and each column ofxc.dfis a covariate.
Value
A data frame with columns Y, ROW and COL, and
additional columns for covariates from xr.df and xc.df, if
included.
The Y column of the output contains the entries in mat, with
one row in the output per one cell in mat, and the ROW and
COL entries indicate the row and column of the data matrix that
correspond to the given cell. Any cells that were NA are left out of the
output data frame.
If xr.df is supplied, then there are additional columns in the
output corresponding to the columns of xr.df, and the values for
each covariate are repeated for every entry that was in the corresponding
row of the data matrix.
Similarly, if xc.df is supplied, there are additional columns in
the output corresponding to the columns of xc.df, and the values
for each covariate are repeated for every entry that was in the
corresponding column of the data matrix.