Dear R-users

I want to generate a growth chart like this:
http://php.med.unsw.edu.au/embryology/images/9/9a/WHO-XX_length_birth_to_2_years.png

can you give some suggestions about the functions I should use?

Thanks

*Yao Zhu*
*Department of Urology
Fudan University Shanghai Cancer Center
Shanghai, China*

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