Problem with XY graph

Hallo
I want to build a XY Graph ( Voltage vs. Current) . Is there anyway to build the Graph without using FOR Loop but only WHILE Loop.
The problem is when I use WHILE alone , I'll get just a point on my Graph .
to Understand what i mean plz take a look on the attached LV
Thank you
Toni
Attachments:
Unbenannt 2.vi ‏79 KB

thank you for your replay
I tried to do like you told me but it dosn't work on my LV , I don't know where is the Problem
can you help me plz
Toni
Attachments:
Messung.vi ‏177 KB

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