Question about boxplot

["Brian Wu" <bwu@guzman.com>]

I have a boxplot as attached.
I want to the boxplot show the range of y from 4 to 6 only.
Is there anyway to configure that by par() or some other function?
Any clues or suggestions will be greatly appreciated!!

Brian X. Wu
Senior Quantitative Analyst
Guzman & Company
101 Aragon Avenue
Coral Gables, FL 33134-5426
(305) 374-3600    Fax (305) 374-0731
<mailto:bwu@guzman.com>
<http://www.guzman.com>
___________________________

This message is intended only for the personal and confidential use of the designated recipient or recipients named above.  If you are not the intended recipient of this message you are hereby notified that any review, dissemination, distribution or copying of this message is strictly prohibited.  This communication is for information purposes only and should not be regarded as an offer to sell or as a solicitation of an offer to buy any financial product, an official confirmation of any transaction, or as an official statement of Guzman & Company.  Email transmission cannot be guaranteed to be secure or error-free.  Therefore, we do not represent that this information is complete or accurate and it should not be relied upon as such.  All information is subject to change without notice.