Alternative Equation Formats

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MathML

\begin{array}{rcl} l (λ, β) & = & \sum_{i = 1}^{n} δ_{i} [\sum_{j = 1}^{J} I (a_{j - 1} \leq t_{i} < a_{j}) \log λ_{j} + β^{'} x_{i}] - \sum_{i = 1}^{n} [\sum_{j = 1}^{J} Δ_{j} (t_{i}) λ_{j}] \exp (β^{'} x_{i}) \\ = & \sum_{j = 1}^{J} d_{j} \log λ_{j} + \sum_{i = 1}^{n} δ_{i} β^{'} x_{i} - \sum_{j = 1}^{J} λ_{j} [\sum_{i = 1}^{n} Δ_{j} (t_{i}) \exp (β^{'} x_{i})] \end{array}

Math Rendered as SVG

Math as LaTeX Source

\begin{eqnarray*} l(\blambda ,\bbeta ) & =& \sum _{i=1}^ n \delta _ i \biggl [ \sum _{j=1}^ J I(a_{j-1} \le t_ i <a_ j) \log \lambda _ j + \bbeta '\mb{x}_ i \biggr ] - \sum _{i=1}^ n \biggl [ \sum _{j=1}^ J \Delta _ j(t_ i)\lambda _ j \biggr ] \exp (\bbeta '\mb{x}_ i) \\ & =& \sum _{j=1}^ J d_ j \log \lambda _ j + \sum _{i=1}^ n \delta _ i \bbeta '\mb{x}_ i -\sum _{j=1}^ J \lambda _ j \biggl [ \sum _{i=1}^ n \Delta _ j(t_ i)\exp (\bbeta '\mb{x}_ i) \biggr ] \end{eqnarray*}