I'm trying to replicate the style of the following pseudocode taken from 'The Elements of Statistical Learning'.

I've tried with algorithm,algorithmic and enumerate (for the item) but I haven't reached the result below...


1 Answer 1


This is just a nested enumerate inside an algorithm environment:

enter image description here


\captionsetup[algorithm]{labelfont={bf,lightblue}, textfont={it}}


\setcounter{chapter}{10}% Just for this example

    Initialize the observation weights $w_i = 1/N$, $i = 1, 2, \dots, N$

    For $m = 1$ to $M$:
      Fit a classifier $G_m(x)$ to the training data using weights $w_i$.

        \text{err}_m = \frac{\sum_{i=1}^N w_i I(y_i \neq G_m(x_i))}{\sum_{i=1}^N w_i}.

      Compute $\alpha_m = \log((1 - \text{err}_m) / \text{err}_m)$.

      Set $w_i \leftarrow w_i \cdot \exp [\alpha_m \cdot I(y_i \neq G_m(x_i))]$, $i = 1, 2, \dots, N$.

  Output $G(x) = \sgn \bigl[ \sum_{m = 1}^M \alpha_m G_m(x) \bigr]$.


  • this looks really neat to me Aug 31, 2019 at 19:50

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