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question regarding Gini index

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From: Ao G.
Date: Fri 5th Jun, 5:41pm
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I have a question regarding Gini index: in page 24 lecture 9, it says The attribute 
provides the smallest GINIsplit(D) should be chosen. But in the following example, we 
didn't compute the GINIsplit(D). Instead we straightly chose the one with lowest GiniA(D), 
which is (low, med)(high). Shouldn't we use 0.459 - 0.443/0.458/0.45 to get the smallest 
GINIsplit(D), in this case (low, high)(medium)?

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question regarding Gini index (both) RSS
├─ THIS   Fri 5th Jun, 5:41pm, Ao G.
└─ reply 1   Fri 5th Jun, 7:03pm, ANONYMOUS
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