Express z-scores as centile character strings for plotting
Converts z-scores, typically defining centiles in a growth chart, to character strings that can be used to label the centile curves.
z2cent(z)
z |
a scalar or vector of z-scores. |
A character string is returned, the same length as z. Z-scores between the 1st and 99th centile are converted to centiles with one or two significant figures (lower tail) or to their complement (upper tail). For larger z-scores in absolute value the character consists of "SDS" appended to the z-score rounded to one decimal place.
Tim Cole tim.cole@ucl.ac.uk
z2cent(-4:4) z2cent(qnorm(0:100/100))
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