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JAX Vectorization & Control Flow
JAXvmap, scan, while_loop, fori_loop, cond, switch — JAX's primitives for batching and control flow.
This track uses JAX. You can make it your practice mode to browse related content across the site.
25 exercises
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Your learning sequence
- 1 Not solved yet. vmap with in_axes Practice · Medium
- 2 Not solved yet. vmap with out_axes Practice · Medium
- 3 Not solved yet. vmap with None broadcasting Practice · Easy
- 4 Not solved yet. Nested vmap (vmap-of-vmap) Practice · Hard
- 5 Not solved yet. Cumulative Sum via lax.scan Practice · Easy
- 6 Not solved yet. Running Mean via lax.scan Practice · Medium
- 7 Not solved yet. Scan over Layer Stack Practice · Medium
- 8 Not solved yet. Training Loop via lax.scan Practice · Hard
- 9 Not solved yet. Scan with Per-Step Outputs Practice · Medium
- 10 Not solved yet. Newton's Method via lax.while_loop Practice · Medium
- 11 Not solved yet. Bounded Search via lax.while_loop Practice · Hard
- 12 Not solved yet. lax.while_loop vs Python while Practice · Medium
- 13 Not solved yet. x^n via lax.fori_loop Practice · Easy
- 14 Not solved yet. fori vs scan vs while Practice · Medium
- 15 Not solved yet. Binary Classification via lax.cond Practice · Easy
- 16 Not solved yet. Multi-Branch Dispatch via lax.switch Practice · Medium
- 17 Not solved yet. vmap over lax.cond Practice · Hard
- 18 Not solved yet. vmap over lax.scan Practice · Hard
- 19 Not solved yet. jit of scan Practice · Medium
- 20 Not solved yet. vmap-cond vs where: cost tradeoff Practice · Hard
- 21 Not solved yet. Dynamic Slice Practice · Medium
- 22 Not solved yet. Dynamic Update Slice Practice · Medium
- 23 Not solved yet. Associative Scan (Parallel Cumsum) Practice · Hard
- 24 Not solved yet. lax.scan with reverse=True Practice · Medium
- 25 Not solved yet. lax.map vs vmap Practice · Medium
Check yourself
4 questions · not saved while you're signed outUse these questions to check your understanding and compare explanations. Your score does not affect track completion.
What does lax.scan return, and why use it over a Python loop?
Choose one answer to reveal the explanations. Answers are kept only while this page is open.
def step(c, x):
return c + x, c
carry, ys = jax.lax.scan(step, 0.0, jnp.arange(5.0))