As to the function"pnorm",the default degree of freedom(df) is infinite. I wanna know how to set the df as I want. Help on pnorm doesn't have df setting.The only choice are:"mean, sd, lower.tail, log.p",but no df. For instance: sample size=6 df=6-1=5 t value=9.143 I wanna to the corresponding p value by using function "pnorm". How can I do it? Thanks a lot for your help! My best ------------------------------ ******************************************* Xin Meng Capitalbio Corporation National Engineering Research Center for Beijing Biochip Technology Microarray and Bioinformatics Dept. Research Engineer Tel: +86-10-80715888/80726868-6364/6333 Fax: +86-10-80726790 Email£ºxmeng at capitalbio.com Address:18 Life Science Parkway, Changping District, Beijing 102206, China
about "pnorm"
3 messages · 孟欣, Daniel Nordlund, ecatchpole
-----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of ?? Sent: Monday, August 29, 2005 8:33 PM To: r-help at stat.math.ethz.ch Subject: [R] about "pnorm" As to the function"pnorm",the default degree of freedom(df) is infinite. I wanna know how to set the df as I want. Help on pnorm doesn't have df setting.The only choice are:"mean, sd, lower.tail, log.p",but no df. For instance: sample size=6 df=6-1=5 t value=9.143 I wanna to the corresponding p value by using function "pnorm". How can I do it? Thanks a lot for your help! My best ------------------------------ ******************************************* Xin Meng Capitalbio Corporation National Engineering Research Center for Beijing Biochip Technology Microarray and Bioinformatics Dept. Research Engineer Tel: +86-10-80715888/80726868-6364/6333 Fax: +86-10-80726790 Email#:xmeng at capitalbio.com Address:18 Life Science Parkway, Changping District, Beijing 102206, China
If you are using t-values with small degrees of freedom, shouldn't you be using pt() rather than pnorm(). Try pt(9.143, 5). Dan Nordlund Bothell, WA
Try ?pt Ted. On 30/08/05 13:33, ÂåŸÂæ£ wrote,:
As to the function"pnorm",the default degree of freedom(df) is infinite. I wanna know how to set the df as I want. Help on pnorm doesn't have df setting.The only choice are:"mean, sd, lower.tail, log.p",but no df. For instance: sample size=6 df=6-1=5 t value=9.143 I wanna to the corresponding p value by using function "pnorm". How can I do it? Thanks a lot for your help! My best Xin Meng
Dr E.A. Catchpole Visiting Fellow Univ of New South Wales at ADFA, Canberra, Australia and University of Kent, Canterbury, England - www.ma.adfa.edu.au/~eac - fax: +61 2 6268 8786 - ph: +61 2 6268 8895