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This function prints a matrix of characters which are very similar to each other.
char_gen(x = c("V", "W"), n = 300, nrow = 10)
a character vector of length 2 (usually two similar characters)
the total number of characters in the matrix
the number of rows
a character matrix on the screen
# NOT RUN { char_gen() char_gen(c("O", "Q")) # }
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