about local variable in defined function and procedure

Hi ncl-users and Dennis,
    I recently define ncl-fuction and procedure by myself to faciliate my processing. I don't think I am familar with the local variable. I find that some functions and procedures pre-defined in "contributed.ncl" and others do not have local variable, but some do. I am wandering when the function or procedure should have local variable. Could you give me some examples to show the necessary to define local variable in a function or procedure. Thank you!

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Best regards
Guanhuan Wen

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Received on Sun Mar 16 23:51:38 2014