Keywords - Function groups - @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Group: Information and Control
See also: existglobal

Function: exist
Description: exist try to find if the input object exists or not. If the object exists, exist gives the typ of the object.

Usage: r = exist ("x") or r = exist(x)
Input:
x object name
Output:
r scalar

Note:

Example:

x = matrix (2,4)
exist("x")
x = createdisplay(1,1)
exist("x")
exist("y")
Result:

Contents of exist
[1,]        1 
Contents of exist
[1,]        4 
Contents of exist
[1,]       -1 

Group: Information and Control
See also: existglobal

Keywords - Function groups - @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

(C) MD*TECH Method and Data Technologies, 28.6.1999