HTML version of Scripted Foils prepared 27 December 1996

Foil 5 Introduction to Fortran90 Arrays - II

From CPS615-Introduction to F90 Features, Rationale for HPF and Problem Architecture Delivered Lectures of CPS615 Basic Simulation Track for Computational Science -- 24 September 96. by Geoffrey C. Fox *
Secs 305.2
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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