Re: [R] ERROR: system is computationally singular: reciprocal condition number = 4.90109e-18

Gerontology School of Medicine Johns Hopkins University Ph. (410) 502-2619 email: rvarad...@jhmi.edu - Original Message - From: Moumita Das Date: Sunday, June 28, 2009 11:20 am Subject: [R] ERROR: system is computationally singular: reciprocal condition number = 4.90109e-18 To: r-help@r

[R] ERROR: system is computationally singular: reciprocal condition number = 4.90109e-18

Hi All, This is my R-version information:--- > version _ platform i486-pc-linux-gnu arch i486 os linux-gnu system i486, linux-gnu status major 2 minor 7.1 year 2008 month 06 day23 svn rev4597

Re: [R] Error: system is computationally singular: reciprocal condition number

Gerontology School of Medicine Johns Hopkins University Ph. (410) 502-2619 email: rvarad...@jhmi.edu - Original Message - From: Moumita Das Date: Sunday, June 28, 2009 10:01 am Subject: Re: [R] Error: system is computationally singular: reciprocal condition number To: r-help@r-project.org >

Re: [R] Error: system is computationally singular: reciprocal condition number

I get this error on using the, traceback() function :-- > traceback() 10: .Call("La_dgesv", a, b, tol, PACKAGE = "base") 9: solve.default(Szz) 8: solve(Szz) 7: pcor.mat(firstvalue, secondvalue, third_var, method, na.rm = T) 6: PartialCorr_Calculation(value1, value2, third_var, method = "pearso

[R] Error: system is computationally singular: reciprocal condition number

I get this error while computing partial correlation. *Error in solve.default(Szz) : system is computationally singular: reciprocal condition number = 4.90109e-18* Why is it?Can anyone give me some idea ,how do i get rid it it? This is the function i use for calculating partial correlation.