is_image - Function

Is this variable an image tool ?

Synopsis
is_image(thing)

Arguments

thing	in	Variable to test
		Allowed:	Glish variable
		Default:	None

Returns
T or F

Description

Determine if this variable is an image tool. This is very useful in scripts; for robustness, you check that the tool is an Image tool before you start applying Image tool functions.

Example

- im:=image('myimage')              
- is_image(im)
T
- im2 := [10,20]
- is_image(im2)
F

Next: imagefiles - Function Up: images - Module Previous: image.view - Function Contents Index

	Package	general
	Module	images