Data

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Data

XLISP-STAT works with two kinds of data: simple data and compound data . Simple data are numbers

1                   ; an integer
-3.14               ; a floating point number
#C(0 1)             ; a complex number (the imaginary unit)

logical values

T                   ; true
nil                 ; false

strings (always enclosed in double quotes)

"This is a string 1 2 3 4"

and symbols (used for naming things; see the following section)

x
x12
12x
this-is-a-symbol

Compound data are lists

(this is a list with 7 elements)
(+ 1 2 3)
(sqrt 2)

or vectors

#(this is a vector with 7 elements)
#(1 2 3)

Higher dimensional arrays are another form of compound data; they will be discussed below in Section 9 .

All the examples given above can be typed directly into the command window as they are shown here. The next subsection describes what XLISP-STAT will do with these expressions.

Next: The Listener and Up: Introduction to Basics Previous: Introduction to Basics

Anthony Rossini
Fri Oct 20 10:29:17 EDT 1995