Civil Engineering Reference
In-Depth Information
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Element
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Figure 1.2 Portion of a finite element mesh with node and element numbers
In this example
local
and
g
would be 8-long vectors, whereas
global
could have
a length of thousands or millions.
1.9.5 Array sections
Parts of arrays or “subarrays” can be referenced by giving an integer range for one or
more of their subscripts. If the range is missing for any subscript, the whole extent of
that dimension is implied. Thus if
a
and
b
are two-dimensional arrays,
a(:,1:3)
and
b(11:13,:)
refer to all the terms in the first three columns of a, and all the terms in
rows 11 through 13 of
b
respectively. If array sections “conform”, that is, have the right
number of rows and columns, they can be manipulated just like “whole” arrays.
1.9.6 Whole-array manipulations
It is worth emphasising that the array-computation features in Fortran 95 remove the need
for several subroutines which were essential in FORTRAN 77 and used in earlier editions
