PROGRAM g03effe ! G03EFF Example Program Text ! Mark 23 Release. NAG Copyright 2011. ! .. Use Statements .. USE nag_library, ONLY : g03eff, nag_wp, x04caf ! .. Implicit None Statement .. IMPLICIT NONE ! .. Parameters .. INTEGER, PARAMETER :: nin = 5, nout = 6 ! .. Local Scalars .. INTEGER :: i, ifail, k, ldc, ldx, lwt, m, & maxit, n, nvar CHARACTER (1) :: weight ! .. Local Arrays .. REAL (KIND=nag_wp), ALLOCATABLE :: cmeans(:,:), css(:), csw(:), wk(:), & wt(:), x(:,:) INTEGER, ALLOCATABLE :: inc(:), isx(:), iwk(:), nic(:) ! .. Intrinsic Functions .. INTRINSIC count ! .. Executable Statements .. WRITE (nout,*) 'G03EFF Example Program Results' WRITE (nout,*) ! Skip heading in the data file READ (nin,*) ! Read in the problem size and control parameters READ (nin,*) weight, n, m, k, maxit IF (weight=='W' .OR. weight=='w') THEN lwt = n ELSE lwt = 0 END IF ldx = n ALLOCATE (x(ldx,m),wt(n),isx(m)) ! Read in data IF (lwt>0) THEN READ (nin,*) (x(i,1:m),wt(i),i=1,n) ELSE READ (nin,*) (x(i,1:m),i=1,n) END IF ! Read in variable inclusion flags READ (nin,*) isx(1:m) ! Calculate NVAR nvar = count(isx(1:m)==1) ldc = k ALLOCATE (cmeans(ldc,nvar),inc(n),nic(k),css(k),csw(k),iwk(n+3*k), & wk(n+2*k)) ! Read in the initial cluster centres READ (nin,*) (cmeans(i,1:nvar),i=1,k) ! Perform k means clustering ifail = 0 CALL g03eff(weight,n,m,x,ldx,isx,nvar,k,cmeans,ldc,wt,inc,nic,css,csw, & maxit,iwk,wk,ifail) ! Display results WRITE (nout,*) ' The cluster each point belongs to' WRITE (nout,99999) inc(1:n) WRITE (nout,*) WRITE (nout,*) ' The number of points in each cluster' WRITE (nout,99999) nic(1:k) WRITE (nout,*) WRITE (nout,*) ' The within-cluster sum of weights of each cluster' WRITE (nout,99998) csw(1:k) WRITE (nout,*) WRITE (nout,*) ' The within-cluster sum of squares of each cluster' WRITE (nout,99997) css(1:k) WRITE (nout,*) FLUSH (nout) ifail = 0 CALL x04caf('General',' ',k,nvar,cmeans,ldc,'The final cluster centres' & ,ifail) 99999 FORMAT (1X,10I6) 99998 FORMAT (1X,5F9.2) 99997 FORMAT (1X,5F13.4) END PROGRAM g03effe