How to delete value in the header line of itab

dear all,
i have create an internal table.
i would like to delete value of the header line after have used read table to read the contents.
how can i do it ?

If your internal table is something like this:
data: begin of i_mara occurs 0.
include structure mara.
data: end of i_mara.
That clears the matnr field of the header line...
CLEAR i_mara-matnr.

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Dear Experts
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Hi Jessica,
Here is a solution where you need not to change your planning layout or to create a new variable or any exit function.
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!http://img688.imageshack.us/img688/9259/imagenjar.png!
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sreedeepa wrote:
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How to delete value in the header line of itab

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