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Fix Gotchas notebook regarding control flow differentiation. #2194

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Feb 11, 2020
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Fix Gotchas notebook regarding control flow differentiation. #2194

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15 changes: 7 additions & 8 deletions docs/notebooks/Common_Gotchas_in_JAX.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -1101,12 +1101,11 @@
"\n",
"There are more options for control flow in JAX. Say you want to avoid re-compilations but still want to use control flow that's traceable, and that avoids un-rolling large loops. Then you can use these 4 structured control flow primitives:\n",
"\n",
" - `lax.cond` _will be differentiable soon_\n",
" - `lax.while_loop` __non-differentiable__*\n",
" - `lax.fori_loop` __non-differentiable__*\n",
" - `lax.cond` _differentiable_\n",
" - `lax.while_loop` __fwd-mode-differentiable__\n",
" - `lax.fori_loop` __fwd-mode-differentiable__\n",
" - `lax.scan` _differentiable_\n",
"\n",
"*_these can in principle be made to be __forward__-differentiable, but this isn't on the current roadmap._"
"\n"
]
},
{
Expand Down Expand Up @@ -1289,9 +1288,9 @@
"\\textrm{if} & ❌ & ✔ \\\\\n",
"\\textrm{for} & ✔* & ✔\\\\\n",
"\\textrm{while} & ✔* & ✔\\\\\n",
"\\textrm{lax.cond} & ✔ & \\textrm{soon!}\\\\\n",
"\\textrm{lax.while_loop} & ✔ & ❌\\\\\n",
"\\textrm{lax.fori_loop} & ✔ & ❌\\\\\n",
"\\textrm{lax.cond} & ✔ & ✔\\\\\n",
"\\textrm{lax.while_loop} & ✔ & \\textrm{fwd}\\\\\n",
"\\textrm{lax.fori_loop} & ✔ & \\textrm{fwd}\\\\\n",
"\\textrm{lax.scan} & ✔ & ✔\\\\\n",
"\\hline\n",
"\\end{array}\n",
Expand Down