Reads an IEEE floating-point value and divides it by 10 raised
to the d th power.
-
w
-
specifies the width of the input field.
| Default: |
8 |
| Range: |
2-8 |
| Tip: |
If w
is 8, an IEEE double-precision, floating-point number is read. If w is 5, 6, or 7, an IEEE double-precision, floating-point number
is read, which assumes truncation of the appropriate number of bytes. If w is 4, an IEEE single-precision, floating-point number is
read. If w is 3, an IEEE single-precision, floating-point
number is read, which assumes truncation of one byte. |
-
d
-
specifies the power of 10 by which to divide
the value.
The IEEEw.d informat is useful in operating environments where IEEE is
the floating-point representation that is used. In addition, you can use
the IEEEw.d informat
to read files that are created by programs on operating environments that
use the IEEE floating-point representation.
Typically, programs generate IEEE values in single precision
(4 bytes) or double precision (8 bytes). Truncation is performed by programs
solely to save space on output files. Machine instructions require that the
floating-point number be of one of the two lengths. The IEEEw.d informat allows other lengths,
which enables you to read data from files that contain space-saving truncated
data.
input test1 ieee4.;
input test2 ieee5.;
|
Data Line* |
Results |
----+----1----+
|
|
3F800000
|
1
|
3FF0000000
|
1
|
| *
The data lines are hexadecimal representations of binary
numbers that are stored in IEEE format. |
The first INPUT statement reads the first data line, and the second
INPUT statement reads the next data line.
Copyright © 2011 by SAS Institute Inc., Cary, NC, USA. All rights reserved.
