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Softmax Function

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Calculates the value of the Softmax function.
The Softmax function is used in neural networks as an activation function, among other applications.
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\( \normalsize Softmax\ function\ \sigma (\bf z \rm)_{j} \\ \sigma (\bf z \rm)_{j} = \Large \frac{e^{z_{j}} }{\displaystyle \sum_{k=1}^{K} e^{z_{k}} } \normalsize \hspace{3px} for\ j = 1,\cdots, K. \)
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Softmax Function | Keisan