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Variable attributes and undef vars [message #90235]

Thu, 12 February 2015 15:01

Lajos Foldy
Messages: 176
Registered: December 2011

Senior Member

From the IDL docs: "All IDL variables have special attributes that return information about the variable. These attributes are equivalent to calling the N_ELEMENTS, SIZE, or TYPENAME functions."

This does not work for undefined variables:

IDL> help, n_elements(a)
<Expression> LONG = 0
IDL> help, a.length
% Expression must be a structure in this context: A.
% Execution halted at: $MAIN$
IDL>

Bug or feature? :-)

regards,
Lajos

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[Message index]

		Variable attributes and undef vars By: Lajos Foldy on Thu, 12 February 2015 15:01
		Re: Variable attributes and undef vars By: chris_torrence@NOSPAM on Thu, 12 February 2015 15:17

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