## FORTRAN: condition on array elements in one column changes corresponding elements in other column

## FORTRAN: condition on array elements in one column changes corresponding elements in other column

(OP)

Hello all,

although it might sound trivial to more experienced users, I am trying to create a code in FORTRAN (preferably f90 or higher) of a n series x 2 columns matrix, where a condition on some elements of column 1, will change the

Working example code of what I did follows:

Thank you in advance for your kind assistance.

although it might sound trivial to more experienced users, I am trying to create a code in FORTRAN (preferably f90 or higher) of a n series x 2 columns matrix, where a condition on some elements of column 1, will change the

__corresponding__elements of column 2 (i.e. only those that have the same "i" with the elements affected by the condition). So far I have managed to do this by creating two (2) column arrays containing the elements and by using a simple "where" command I did what I wanted. Could someone please try to inform me how to perform the same job but without spliting the array into two sub-arrays?Working example code of what I did follows:

#### CODE --> fortran

program test implicit none integer::elem real,dimension(:),allocatable::A real,dimension(:),allocatable::B integer::i,j elem = 10 allocate(A(elem)) allocate(B(elem)) do i=1,10 A(i)=i end do do j=1,10 B(j)=0 end do where (A>=3 .and. A<=6) B = 1 deallocate(A,B) end program test

Thank you in advance for your kind assistance.

## RE: FORTRAN: condition on array elements in one column changes corresponding elements in other column

do blah

A=i

if A>=3 .and. A<=6 then

B=1

else

B=0

end if

end do

FWIW there is a Fortran forum: forum545: Fortran

TTFN

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## RE: FORTRAN: condition on array elements in one column changes corresponding elements in other column

## RE: FORTRAN: condition on array elements in one column changes corresponding elements in other column

## CODE --> f95