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iter_a.f
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iter_a.f
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program f77iterate_a
external flux_rate
integer ncols
parameter (ncols=3)
integer units(ncols), colnum(ncols), datatype(ncols)
integer iotype(ncols), offset, rows_per_loop, status
character*70 colname(ncols)
integer iunit, blocksize
character*80 fname
C include f77.inc -------------------------------------
C Codes for FITS extension types
integer IMAGE_HDU, ASCII_TBL, BINARY_TBL
parameter (
& IMAGE_HDU = 0,
& ASCII_TBL = 1,
& BINARY_TBL = 2 )
C Codes for FITS table data types
integer TBIT,TBYTE,TLOGICAL,TSTRING,TSHORT,TINT
integer TFLOAT,TDOUBLE,TCOMPLEX,TDBLCOMPLEX
parameter (
& TBIT = 1,
& TBYTE = 11,
& TLOGICAL = 14,
& TSTRING = 16,
& TSHORT = 21,
& TINT = 31,
& TFLOAT = 42,
& TDOUBLE = 82,
& TCOMPLEX = 83,
& TDBLCOMPLEX = 163 )
C Codes for iterator column types
integer InputCol, InputOutputCol, OutputCol
parameter (
& InputCol = 0,
& InputOutputCol = 1,
& OutputCol = 2 )
C End of f77.inc -------------------------------------
iunit = 15
units(1) = iunit
units(2) = iunit
units(3) = iunit
C open the file
fname = 'iter_a.fit'
call ftopen(iunit,fname,1,blocksize,status)
C move to the HDU containing the rate table
call ftmnhd(iunit, BINARY_TBL, 'RATE', 0, status)
C Select iotypes for column data
iotype(1) = InputCol
iotype(2) = InputCol
iotype(3) = OutputCol
C Select desired datatypes for column data
datatype(1) = TINT
datatype(2) = TFLOAT
datatype(3) = TFLOAT
C find the column number corresponding to each column
call ftgcno( iunit, 0, 'counts', colnum(1), status )
call ftgcno( iunit, 0, 'time', colnum(2), status )
call ftgcno( iunit, 0, 'rate', colnum(3), status )
C use default optimum number of rows
rows_per_loop = 0
offset = 0
C apply the rate function to each row of the table
print *, 'Calling iterator function...', status
C although colname is not being used, still need to send a string
C array in the function
call ftiter( ncols, units, colnum, colname, datatype, iotype,
& offset, rows_per_loop, flux_rate, 3, status )
call ftclos(iunit, status)
stop
end
C***************************************************************************
C Sample iterator function that calculates the output flux 'rate' column
C by dividing the input 'counts' by the 'time' column.
C It also applies a constant deadtime correction factor if the 'deadtime'
C keyword exists. Finally, this creates or updates the 'LIVETIME'
C keyword with the sum of all the individual integration times.
C***************************************************************************
subroutine flux_rate(totalrows, offset, firstrow, nrows, ncols,
& units, colnum, datatype, iotype, repeat, status, userData,
& counts, interval, rate )
integer totalrows, offset, firstrow, nrows, ncols
integer units(ncols), colnum(ncols), datatype(ncols)
integer iotype(ncols), repeat(ncols)
integer userData
C include f77.inc -------------------------------------
C Codes for FITS extension types
integer IMAGE_HDU, ASCII_TBL, BINARY_TBL
parameter (
& IMAGE_HDU = 0,
& ASCII_TBL = 1,
& BINARY_TBL = 2 )
C Codes for FITS table data types
integer TBIT,TBYTE,TLOGICAL,TSTRING,TSHORT,TINT
integer TFLOAT,TDOUBLE,TCOMPLEX,TDBLCOMPLEX
parameter (
& TBIT = 1,
& TBYTE = 11,
& TLOGICAL = 14,
& TSTRING = 16,
& TSHORT = 21,
& TINT = 31,
& TFLOAT = 42,
& TDOUBLE = 82,
& TCOMPLEX = 83,
& TDBLCOMPLEX = 163 )
C Codes for iterator column types
integer InputCol, InputOutputCol, OutputCol
parameter (
& InputCol = 0,
& InputOutputCol = 1,
& OutputCol = 2 )
C End of f77.inc -------------------------------------
integer counts(*)
real interval(*),rate(*)
integer ii, status
character*80 comment
C**********************************************************************
C must preserve these values between calls
real deadtime, livetime
common /fluxblock/ deadtime, livetime
C**********************************************************************
if (status .ne. 0) return
C --------------------------------------------------------
C Initialization procedures: execute on the first call
C --------------------------------------------------------
if (firstrow .eq. 1) then
if (ncols .ne. 3) then
C wrong number of columns
status = -1
return
endif
if (datatype(1).ne.TINT .or. datatype(2).ne.TFLOAT .or.
& datatype(3).ne.TFLOAT ) then
C bad data type
status = -2
return
endif
C try to get the deadtime keyword value
call ftgkye( units(1), 'DEADTIME', deadtime, comment, status )
if (status.ne.0) then
C default deadtime if keyword doesn't exist
deadtime = 1.0
status = 0
elseif (deadtime .lt. 0.0 .or. deadtime .gt. 1.0) then
C bad deadtime value
status = -3
return
endif
print *, 'deadtime = ', deadtime
livetime = 0.0
endif
C --------------------------------------------
C Main loop: process all the rows of data
C --------------------------------------------
C NOTE: 1st element of array is the null pixel value!
C Loop over elements 2 to nrows+1, not 1 to nrows.
C this version ignores null values
C set the output null value to zero to ignore nulls */
rate(1) = 0.0
do 10 ii = 2,nrows+1
if ( interval(ii) .gt. 0.0) then
rate(ii) = counts(ii) / interval(ii) / deadtime
livetime = livetime + interval(ii)
else
C Nonsensical negative time interval
status = -3
return
endif
10 continue
C -------------------------------------------------------
C Clean up procedures: after processing all the rows
C -------------------------------------------------------
if (firstrow + nrows - 1 .eq. totalrows) then
C update the LIVETIME keyword value
call ftukye( units(1),'LIVETIME', livetime, 3,
& 'total integration time', status )
print *,'livetime = ', livetime
endif
return
end