pban92
Joined: 23 Nov 2009
Posts: 38
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 Posted: Fri Nov 27, 2009 10:43 pm Post subject: Histogram error: Array subscript(s) out-of-bounds |
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I am writing a code to make histogram. I created three subroutines. One would read data from an external file, second will calculate histogram and the last one will write the results. The subroutine histogram giving me the error. This is the data file http://www.sendspace.com/file/ydezb9 and the code is as shown below. Any help would be highly appreciated. Thanks!
| Code: |
PROGRAM histo
IMPLICIT NONE
INTEGER :: n, bin
REAL :: mode_value
REAL, DIMENSION(4096) :: velocity, hist_scale, hist
n = 4096
bin = 50
CALL READDATA(velocity,n)
CALL HISTOGRAM(velocity,n,bin,hist_scale,hist,mode_value)
CALL WRITEDATA(bin,hist_scale,hist, mode_value)
CLOSE(UNIT = 3)
CLOSE(UNIT = 9)
STOP
END PROGRAM
SUBROUTINE READDATA(y,n)
IMPLICIT NONE
INTEGER :: i, ierr
REAL :: xdummy
INTEGER, INTENT(IN) :: n
REAL, INTENT(OUT), DIMENSION(n) :: y
ierr = 0
OPEN (UNIT=3, FILE='sinedata.txt', STATUS='OLD', ACTION='READ', IOSTAT=ierr)
DO i = 1, n
READ (3,*,IOSTAT=ierr) xdummy, y(i)
END DO
RETURN
END SUBROUTINE
SUBROUTINE HISTOGRAM(velocity,n,bin,hist_scale,hist,expected_value)
IMPLICIT NONE
INTEGER, INTENT(IN) :: n,bin
REAL, DIMENSION(n), INTENT(IN) :: velocity
REAL, DIMENSION(bin), INTENT(OUT) :: hist, hist_scale
REAL, INTENT(OUT) :: expected_value
REAL :: container, min=0., maxx=2.
INTEGER :: line, i, con
hist=0
DO i=1,n
container=((velocity(i)-min)*(REAL(bin)/maxx))
IF (container >= bin) container = bin-1
line = int(container)+1
hist(line) = hist(line)+1
END DO
hist = hist/(n/REAL(bin))
DO i = 1,bin
hist_scale(i) = min+((i-1)*maxx/REAL(bin))
END DO
container = 0.
DO i = 1,bin,1
IF (container < hist(i)) THEN
container = hist(i)
con = i
END IF
END DO
expected_value = (hist_scale(con)+hist_scale(con+1))/2.
RETURN
END SUBROUTINE histogram
SUBROUTINE WRITEDATA(bin,hist_scale,hist, mode_value)
IMPLICIT NONE
INTEGER :: ierr, i
INTEGER, INTENT(IN) :: bin
REAL, INTENT(IN) :: mode_value
REAL, INTENT(IN), DIMENSION(bin) :: hist_scale,hist
WRITE(*,*) 'Mode Value = ', mode_value
OPEN (UNIT=9, FILE='03 hist.txt', STATUS='REPLACE', ACTION='WRITE', IOSTAT=ierr)
DO i = 1, bin
WRITE(9,*) hist_scale(i), hist(i)
END DO
RETURN
END SUBROUTINE
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