Converts a string to a character vector.
s (string) – to be converted to character vector.
v (Nx1 character vector) – contains the contents of s.
s = "Now is the time for all good men"; v = stocv(s);
"Now is t" "the time " v = "for all " "good men"
stocv() breaks s up into a vector of 8-character length matrix elements.