Question: PLOT3D(GRID(.... page 264 of advanced programming guide

It's been half an hour that I am looking to the example 5 and I can't figured how you can state that x run from 1 to 3 and y from 1 to 2 just by looking at LL.  If I undestand this, I will know how to write those twelve points.

Does anyone would have the patience to explain it to me?


Thanks in advance.



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