(
(
(
(
MAT READ array-name
8rows
[,columns]
I]
[.array-name
[(rows
[,columns] I]] ...
MAT READ
The
MAT
READ statement allows you
to
assign values from
the
data table (estab-
lished by DATA statementsl
to
the
elements
of
an array without referring
to
each
individual array element. You can also use
the
MAT
READ statement
to
redimen-
sion arrays. The syntax
of
the
MAT
READ statement
is
as
shown:
MAT READ array-name
8rows
[,columns]
I]
[.array-name
[(rows
[,columns] I]] ...
where:
array-name
is
the
name
of
a numeric or character array. Only one array name
is
required.
rows,
columns are the optional redimension specifications for
the
array.
At
the beginning
of
program execution, a pointer
is
set
to
the
first value
in
the data
table. When a READ
or
MAT
READ statement
is
encountered, successive values from
the
data table are assigned
to
the
variables
or
array elements
in
a READ statement,
or
to
entire arrays
in
the
MAT
READ statement. The values are assigned
to
the
array
by rows, beginning
at
the
current position
of
the
data table pointer. The data table
pointer can be reset by use
of
the
RESTORE statement.
If
a redimension specification follows
the
array name,
the
truncated integer portion
of
each value
in
rows and columns
is
used
to
redimension
the
array before values
are assigned
to
it.
Notes
About
MAT
READ
• Before being used
in
a MAT READ statement, arrays must have been previously
defined, either implicitly,
or
explicitly
in
a
USE
or
DIM
statement.
•
If
the
data table
is
exhausted and unassigned arrays
or
array elements remain
in
the
MAT
READ statement, an error occurs.
•
If
there are no DATA statements
in
the
program, the
MAT
READ statement
will
cause an error.
• The
MAT
READ statement cannot be used
in
a program assigned
to
one
of
the
function keys. This will cause an error when
the
function
is
executed.
•
If
redimension specifications are entered,
the
rules under Redimensioning Arrays,
Chapter 3, must be followed.
141
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