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. 2019 Jun 3;19(11):2538. doi: 10.3390/s19112538

Algorithm 1 Floor Identification Using Magnetic Data

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Input: magnetic data M, User phone orientation O
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for $i ⟵ 1 t o 5$ do
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$S_{m} ⟵ t r a n s f o r m M a g D a t a (O_{i}, M_{i});$
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for $j ⟵ N_{b}$ do
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$E_{d} ⟵ c a l E u c D i s t a n c e (S_{m}, D B_{b j});$
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end for
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$F_{c} ⟵ a r g m i n (E_{d});$
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end for
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$F_{b} ⟵ r e m o v e O u t l i e r s (F_{c});$