deleting element in 2d array?

I want to delete an element in a 2d vector, say [1][1] in "Field", which is a 4x5 vector

I tried

Code:

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Field.erase([1][1]);

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I know that for a 1d vector, I would just do

Code:

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Field.erase (Field.begin()+1)

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but what about for 2d vectors?

Never mind I figured it out