Linear algebra introduction tensors and arrays

Tutorial 4 steps, run in order in one session. Every step was executed against the engine and the output below is what it produced.

Step 1

vec = {1, 2, 3}

Output

{1, 2, 3}

Step 2

Dimensions[vec]

Output

{3}

Step 3

tensor = { {{1, 2, 3, 4}, {4, 5, 6, 7}, {4, 5, 6, 7}}, {{1, 2, 3, 9}, {1, 2, 6, 5}, {1, 2, 6, 5}}}

Output

{{{1, 2, 3, 4}, {4, 5, 6, 7}, {4, 5, 6, 7}}, {{1, 2, 3, 9}, {1, 2, 6, 5}, {1, 2, 6, 5}}}

Step 4

Dimensions[tensor]

Output

{2, 3, 4}

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