Basic HTML version of Foils prepared 17 Sept 1996

Foil 7 Introduction to Fortran90 Arrays - II

From New CPS615HPF and Fortran90 Discussion Sept 17 96 Basic Simulation Track for Computational Science CPS615 -- Fall Semester 96. by Geoffrey C. Fox, Tom Haupt
1 Extract sections (subarrays) of arrays as u(lb:ub:step)
  • lb is Lower Bound
  • ub is Upper Bound
  • step (defaults to 1) is step
2 masked (conditional) Array operations using WHERE .... ELSEWHERE
3 Can still do Fortran77 array element operations (DO Loops) but of course this might not be interpretable for efficient parallelism by HPF compiler
4 Note Fortran90 designed for science and engineering with originally special concern for vector supercomputers but Cray supports F77 better than F90(!)
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© on Tue Oct 7 1997