Program g02bufe ! G02BUF Example Program Text ! Mark 24 Release. NAG Copyright 2012. ! .. Use Statements .. Use nag_library, Only: dscal, g02buf, nag_wp, x04ccf ! .. Implicit None Statement .. Implicit None ! .. Parameters .. Real (Kind=nag_wp), Parameter :: one = 1.0_nag_wp Integer, Parameter :: inc1 = 1, nin = 5, nout = 6 ! .. Local Scalars .. Real (Kind=nag_wp) :: alpha, sw Integer :: i, ifail, lc, ldx, lwt, m, n Character (1) :: mean, weight ! .. Local Arrays .. Real (Kind=nag_wp), Allocatable :: c(:), wmean(:), wt(:), x(:,:) ! .. Executable Statements .. Write (nout,*) 'G02BUF Example Program Results' Write (nout,*) Flush (nout) ! Skip heading in data file Read (nin,*) ! Read in problem size Read (nin,*) mean, weight, m, n If (weight=='W' .Or. weight=='w') Then lwt = n Else lwt = 0 End If ldx = n lc = (m*m+m)/2 Allocate (wt(lwt),x(ldx,m),wmean(m),c(lc)) ! Read in data If (lwt>0) Then Read (nin,*) wt(1:n) End If Read (nin,*)(x(i,1:m),i=1,n) ! Calculate sums of squares and cross-products matrix ifail = 0 Call g02buf(mean,weight,n,m,x,ldx,wt,sw,wmean,c,ifail) ! Display results Write (nout,*) 'Means' Write (nout,99999) wmean(1:m) Write (nout,*) Write (nout,*) 'Weights' Write (nout,99999) wt(1:n) Write (nout,*) Flush (nout) ifail = 0 Call x04ccf('Upper','Non-unit',m,c,'Sums of squares and cross-products', & ifail) ! Convert the sums of squares and cross-products to a variance matrix If (sw>one) Then alpha = one/(sw-one) ! The NAG name equivalent of dscal is f06edf Call dscal(lc,alpha,c,inc1) Write (nout,*) Flush (nout) ifail = 0 Call x04ccf('Upper','Non-unit',m,c,'Variance matrix',ifail) End If 99999 Format (1X,6F14.4) End Program g02bufe