Alternative Equation Formats

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MathML

W_{i} = \sum_{j = 1}^{N} w_{j} I [y_{j} = y_{i}]

W_{i} = \sum_{j = 1}^{N} w_{j} I [y_{j} = y_{i}]

$W_ i = \sum _{j=1}^{N} w_ j I[y_ j = y_ i]$