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Converts column indices to Excel column names.
idx2col(x)
Numeric (integer) vector of column indices
Returns a character vector of corresponding Excel column names. Numbers <= 0 result in the empty string ("").
<= 0
col2idx, idx2cref, cref2idx, idx2aref, aref2idx, aref
col2idx
idx2cref
cref2idx
idx2aref
aref2idx
aref
# NOT RUN { idx2col(c(1, 347)) # }
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