Exercise

Handwritten digits with `flexmix`

The digits_sample_2 is a data frame that has 478 observations, each of them representing a binary image of a handwritten digit formed by 16x16 pixels. The aims of this exercise are (1) to explore these data, (2) to fit a Bernoulli mixture model using flexmix and (3) to analyze the resulting clusters.

Instructions 1/3

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Transform the data frame digits_sample_2 into a matrix.
Check the dimensions of the matrix.
Using show_digit, inspect the first and last row of the matrix.