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Last change
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checked in by opalod, 22 years ago
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Initial revision
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Author Date Id Revision
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| 1 | ;------------------------------------------------------------ |
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| 2 | ;------------------------------------------------------------ |
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| 3 | ;------------------------------------------------------------ |
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| 4 | ;+ |
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| 5 | ; NAME: undefine |
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| 6 | ; |
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| 7 | ; PURPOSE: effacer une variable |
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| 8 | ; meme chose que delvar mais utiulisable ds un programme et |
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| 9 | ; utilisable que pour une variable a la fois |
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| 10 | ; |
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| 11 | ; CATEGORY: |
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| 12 | ; |
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| 13 | ; CALLING SEQUENCE: UNDEFINE, varname |
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| 14 | ; |
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| 15 | ; INPUTS: varname: la variable a detruire |
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| 16 | ; |
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| 17 | ; EXAMPLE: |
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| 18 | ; |
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| 19 | ; IDL> a=1 |
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| 20 | ; IDL> undefine,a |
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| 21 | ; % Compiled module: UNDEFINE. |
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| 22 | ; IDL> help, a |
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| 23 | ; A UNDEFINED = <Undefined> |
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| 24 | ; |
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| 25 | ; MODIFICATION HISTORY: trouve sur la page web de D.Fanning |
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| 26 | ; http://www.dfanning.com : |
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| 27 | ;QUESTION: How do I make an IDL variable have a type "undefined"? |
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| 28 | ;ANSWER: At the main IDL level you can use the IDL procedure DELVAR to |
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| 29 | ;delete an IDL variable and make it undefined. Inside of procedures |
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| 30 | ;and functions, I use this little program named UNDEFINE that I got |
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| 31 | ;from Andrew Cool at the DSTO High Frequency Radar Division in |
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| 32 | ;Adelaide, Australia. |
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| 33 | ; |
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| 34 | ;- |
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| 35 | ;------------------------------------------------------------ |
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| 36 | ;------------------------------------------------------------ |
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| 37 | ;------------------------------------------------------------ |
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| 38 | PRO UNDEFINE, varname |
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| 39 | tempvar = SIZE(TEMPORARY(varname)) |
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| 40 | END |
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| 41 | |
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