{"action":"created","issue":{"url":"https://api.github.com/repos/gslab-econ/gslab_r/issues/7","repository_url":"https://api.github.com/repos/gslab-econ/gslab_r","labels_url":"https://api.github.com/repos/gslab-econ/gslab_r/issues/7/labels{/name}","comments_url":"https://api.github.com/repos/gslab-econ/gslab_r/issues/7/comments","events_url":"https://api.github.com/repos/gslab-econ/gslab_r/issues/7/events","html_url":"https://github.com/gslab-econ/gslab_r/pull/7","id":241933602,"number":7,"title":"Development NumericalDerivatives","user":{"login":"yuchuan2016","id":16677008,"avatar_url":"https://avatars1.githubusercontent.com/u/16677008?v=3","gravatar_id":"","url":"https://api.github.com/users/yuchuan2016","html_url":"https://github.com/yuchuan2016","followers_url":"https://api.github.com/users/yuchuan2016/followers","following_url":"https://api.github.com/users/yuchuan2016/following{/other_user}","gists_url":"https://api.github.com/users/yuchuan2016/gists{/gist_id}","starred_url":"https://api.github.com/users/yuchuan2016/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/yuchuan2016/subscriptions","organizations_url":"https://api.github.com/users/yuchuan2016/orgs","repos_url":"https://api.github.com/users/yuchuan2016/repos","events_url":"https://api.github.com/users/yuchuan2016/events{/privacy}","received_events_url":"https://api.github.com/users/yuchuan2016/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":1,"created_at":"2017-07-11T06:01:17Z","updated_at":"2017-07-12T20:04:10Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/gslab-econ/gslab_r/pulls/7","html_url":"https://github.com/gslab-econ/gslab_r/pull/7","diff_url":"https://github.com/gslab-econ/gslab_r/pull/7.diff","patch_url":"https://github.com/gslab-econ/gslab_r/pull/7.patch"},"body":"@arosenbe , could you kindly take a look at this? This package is simply a translation of [this MATLAB library](https://econ-gentzkow-svn.stanford.edu/repos/main/trunk/lib/matlab/numerical_derivatives/). It should be straightforward. Thanks!"},"comment":{"url":"https://api.github.com/repos/gslab-econ/gslab_r/issues/comments/314880992","html_url":"https://github.com/gslab-econ/gslab_r/pull/7#issuecomment-314880992","issue_url":"https://api.github.com/repos/gslab-econ/gslab_r/issues/7","id":314880992,"user":{"login":"arosenbe","id":19935793,"avatar_url":"https://avatars0.githubusercontent.com/u/19935793?v=3","gravatar_id":"","url":"https://api.github.com/users/arosenbe","html_url":"https://github.com/arosenbe","followers_url":"https://api.github.com/users/arosenbe/followers","following_url":"https://api.github.com/users/arosenbe/following{/other_user}","gists_url":"https://api.github.com/users/arosenbe/gists{/gist_id}","starred_url":"https://api.github.com/users/arosenbe/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/arosenbe/subscriptions","organizations_url":"https://api.github.com/users/arosenbe/orgs","repos_url":"https://api.github.com/users/arosenbe/repos","events_url":"https://api.github.com/users/arosenbe/events{/privacy}","received_events_url":"https://api.github.com/users/arosenbe/received_events","type":"User","site_admin":false},"created_at":"2017-07-12T20:04:10Z","updated_at":"2017-07-12T20:04:10Z","body":"Thanks @yuchuan2016. I like the new `sapply` syntax a lot! On the empty function check, I think you were initially correct in ignoring it (don't know why I brought it up). Nobody can take the Jacobian of a nonexistent function.\r\n\r\nI have one more comment: All arguments should be passed explicitly to `f`. We shouldn't rely on the parent scope to fill them in for us. "}}
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