Lecture 3, Supervised Learning

Did you remember to make the first column something unique in your call to get_records? Duplicate value '1' found in column 'activated'.
  • line 1291 of /lib/dml/mysqli_native_moodle_database.php: call to debugging()
  • line 1679 of /lib/dml/moodle_database.php: call to mysqli_native_moodle_database->get_records_sql()
  • line 1752 of /lib/dml/moodle_database.php: call to moodle_database->get_record_sql()
  • line 1733 of /lib/dml/moodle_database.php: call to moodle_database->get_field_sql()
  • line 1712 of /lib/dml/moodle_database.php: call to moodle_database->get_field_select()
  • line 231 of /plagiarism/compilatio/lib.php: call to moodle_database->get_field()
  • line 48 of /plagiarism/compilatio/classes/compilatio/documentFrame.php: call to compilatio_enabled()
  • line 93 of /plagiarism/compilatio/lib.php: call to CompilatioDocumentFrame::get_document_frame()
  • line 48 of /lib/plagiarismlib.php: call to plagiarism_plugin_compilatio->get_links()
  • line 561 of /mod/forum/classes/local/exporters/post.php: call to plagiarism_get_links()
  • line 423 of /mod/forum/classes/local/exporters/post.php: call to mod_forum\local\exporters\post->get_message()
  • line 125 of /lib/classes/external/exporter.php: call to mod_forum\local\exporters\post->get_other_values()
  • line 155 of /mod/forum/classes/local/exporters/posts.php: call to core\external\exporter->export()
  • line ? of unknownfile: call to mod_forum\local\exporters\posts->mod_forum\local\exporters\{closure}()
  • line 157 of /mod/forum/classes/local/exporters/posts.php: call to array_map()
  • line 125 of /lib/classes/external/exporter.php: call to mod_forum\local\exporters\posts->get_other_values()
  • line 189 of /mod/forum/classes/local/builders/exported_posts.php: call to core\external\exporter->export()
  • line 95 of /mod/forum/classes/local/renderers/posts.php: call to mod_forum\local\builders\exported_posts->build()
  • line 212 of /mod/forum/classes/local/renderers/discussion.php: call to mod_forum\local\renderers\posts->render()
  • line 343 of /mod/forum/discuss.php: call to mod_forum\local\renderers\discussion->render()
Error: mdb->get_record() found more than one record!
  • line 1691 of /lib/dml/moodle_database.php: call to debugging()
  • line 1651 of /lib/dml/moodle_database.php: call to moodle_database->get_record_sql()
  • line 1630 of /lib/dml/moodle_database.php: call to moodle_database->get_record_select()
  • line 160 of /plagiarism/compilatio/lib.php: call to moodle_database->get_record()
  • line 53 of /plagiarism/compilatio/classes/compilatio/documentFrame.php: call to compilatio_cm_use()
  • line 93 of /plagiarism/compilatio/lib.php: call to CompilatioDocumentFrame::get_document_frame()
  • line 48 of /lib/plagiarismlib.php: call to plagiarism_plugin_compilatio->get_links()
  • line 561 of /mod/forum/classes/local/exporters/post.php: call to plagiarism_get_links()
  • line 423 of /mod/forum/classes/local/exporters/post.php: call to mod_forum\local\exporters\post->get_message()
  • line 125 of /lib/classes/external/exporter.php: call to mod_forum\local\exporters\post->get_other_values()
  • line 155 of /mod/forum/classes/local/exporters/posts.php: call to core\external\exporter->export()
  • line ? of unknownfile: call to mod_forum\local\exporters\posts->mod_forum\local\exporters\{closure}()
  • line 157 of /mod/forum/classes/local/exporters/posts.php: call to array_map()
  • line 125 of /lib/classes/external/exporter.php: call to mod_forum\local\exporters\posts->get_other_values()
  • line 189 of /mod/forum/classes/local/builders/exported_posts.php: call to core\external\exporter->export()
  • line 95 of /mod/forum/classes/local/renderers/posts.php: call to mod_forum\local\builders\exported_posts->build()
  • line 212 of /mod/forum/classes/local/renderers/discussion.php: call to mod_forum\local\renderers\posts->render()
  • line 343 of /mod/forum/discuss.php: call to mod_forum\local\renderers\discussion->render()

Lecture 3, Supervised Learning

par SANJAR TLEPIN,
Nombre de réponses : 0

1st exercise

Binary Classification:

Hypothesis space can be considered as any space which divide the data in two sets. As it was shown in examples during the lecture, the line can separate the date in two groups: above and under the line, inside and outside the figure. 

Multy-class Classification(p classes):

It is almost the same case as for binary classification, but only difference is that the space can be divided in more than two groups (classes).

Regression:

With regression we not making a goal to split data into groups, but to find a mapping function based on data.  

It can be considered as a set of lines (linear regression) or other functions of a higher degree of one, like what we did in the polynomial regression in the last session. As it was shown in the class, we need to initialize the rule before trying to classify the space.


2nd exercise

Run simple test on Boston dataset I came to conclusion that model with zero alpha value get higher MSE. But increasing the alpha not always increase accuracy of the model.