{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2026-05-26T00:16:20.000Z","description":"Problems submitted by members of the MATLAB Central community.","is_default":true,"created_by":161519,"badge_id":null,"featured":false,"trending":false,"solution_count_in_trending_period":0,"trending_last_calculated":"2026-05-26T00:00:00.000Z","image_id":null,"published":true,"community_created":false,"status_id":2,"is_default_group_for_player":false,"deleted_by":null,"deleted_at":null,"restored_by":null,"restored_at":null,"description_opc":null,"description_html":null,"published_at":null},"problems":[{"id":940,"title":"R2012b atan in Degrees","description":"Return in degrees the atan result of inputs for all four quadrants.\r\n\r\n*Examples:*\r\n\r\n  [x, y] Degrees\r\n   1  0     0\r\n   1  1    45\r\n  -1  1   135\r\n  -1 -1  -135\r\n   1 -1   -45\r\n  -1  0  -180\r\n   0 -1   -90\r\n \r\n\r\n*Input:* [ x , y ]\r\n\r\n*Output:* Angle : Degrees [ 0:180 ] ( -180:0 ) -180 is not a valid return value\r\n\r\nNote: Input to atan2 is Y , X not X , Y\r\n\r\nMatlab \u003chttp://www.mathworks.com/products/matlab/whatsnew.html Whatsnew\u003e\r\n\r\nR2012b \u003chttp://www.mathworks.com/help/matlab/ref/atan2d.html Update Note\u003e","description_html":"\u003cp\u003eReturn in degrees the atan result of inputs for all four quadrants.\u003c/p\u003e\u003cp\u003e\u003cb\u003eExamples:\u003c/b\u003e\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003e[x, y] Degrees\r\n 1  0     0\r\n 1  1    45\r\n-1  1   135\r\n-1 -1  -135\r\n 1 -1   -45\r\n-1  0  -180\r\n 0 -1   -90\r\n\u003c/pre\u003e\u003cp\u003e\u003cb\u003eInput:\u003c/b\u003e [ x , y ]\u003c/p\u003e\u003cp\u003e\u003cb\u003eOutput:\u003c/b\u003e Angle : Degrees [ 0:180 ] ( -180:0 ) -180 is not a valid return value\u003c/p\u003e\u003cp\u003eNote: Input to atan2 is Y , X not X , Y\u003c/p\u003e\u003cp\u003eMatlab \u003ca href=\"http://www.mathworks.com/products/matlab/whatsnew.html\"\u003eWhatsnew\u003c/a\u003e\u003c/p\u003e\u003cp\u003eR2012b \u003ca href=\"http://www.mathworks.com/help/matlab/ref/atan2d.html\"\u003eUpdate Note\u003c/a\u003e\u003c/p\u003e","function_template":"function degrees = atan_degrees(x,y)\r\n  degrees=0;\r\nend","test_suite":"%%\r\nassert(isequal(atan_degrees(1,1),45))\r\n%%\r\nassert(isequal(atan_degrees(-1,1),135))\r\n%%\r\nassert(isequal(atan_degrees(-1,-1),-135))\r\n%%\r\nassert(isequal(atan_degrees(1,-1),-45))\r\n%%\r\nassert(isequal(atan_degrees(1,0),0))\r\n%%\r\nassert(isequal(atan_degrees(0,1),90))\r\n%%\r\nassert(isequal(atan_degrees(-1,0),180))\r\n%%\r\nassert(isequal(atan_degrees(0,-1),-90))\r\n","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":3097,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":73,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2012-09-10T03:53:34.000Z","updated_at":"2026-03-06T12:24:34.000Z","published_at":"2012-10-28T17:20:12.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"targetMode\":\"\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"targetMode\":\"\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eReturn in degrees the atan result of inputs for all four quadrants.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:b/\u003e\u003c/w:rPr\u003e\u003cw:t\u003eExamples:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"code\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u003c![CDATA[[x, y] Degrees\\n 1  0     0\\n 1  1    45\\n-1  1   135\\n-1 -1  -135\\n 1 -1   -45\\n-1  0  -180\\n 0 -1   -90]]\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:b/\u003e\u003c/w:rPr\u003e\u003cw:t\u003eInput:\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e [ x , y ]\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:b/\u003e\u003c/w:rPr\u003e\u003cw:t\u003eOutput:\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e Angle : Degrees [ 0:180 ] ( -180:0 ) -180 is not a valid return value\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eNote: Input to atan2 is Y , X not X , Y\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle 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\u003chttp://www.mathworks.com/help/matlab/ref/atan2d.html Update Note\u003e","description_html":"\u003cp\u003eReturn in degrees the atan result of inputs for all four quadrants.\u003c/p\u003e\u003cp\u003e\u003cb\u003eExamples:\u003c/b\u003e\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003e[x, y] Degrees\r\n 1  0     0\r\n 1  1    45\r\n-1  1   135\r\n-1 -1  -135\r\n 1 -1   -45\r\n-1  0  -180\r\n 0 -1   -90\r\n\u003c/pre\u003e\u003cp\u003e\u003cb\u003eInput:\u003c/b\u003e [ x , y ]\u003c/p\u003e\u003cp\u003e\u003cb\u003eOutput:\u003c/b\u003e Angle : Degrees [ 0:180 ] ( -180:0 ) -180 is not a valid return value\u003c/p\u003e\u003cp\u003eNote: Input to atan2 is Y , X not X , Y\u003c/p\u003e\u003cp\u003eMatlab \u003ca href=\"http://www.mathworks.com/products/matlab/whatsnew.html\"\u003eWhatsnew\u003c/a\u003e\u003c/p\u003e\u003cp\u003eR2012b \u003ca href=\"http://www.mathworks.com/help/matlab/ref/atan2d.html\"\u003eUpdate Note\u003c/a\u003e\u003c/p\u003e","function_template":"function degrees = atan_degrees(x,y)\r\n  degrees=0;\r\nend","test_suite":"%%\r\nassert(isequal(atan_degrees(1,1),45))\r\n%%\r\nassert(isequal(atan_degrees(-1,1),135))\r\n%%\r\nassert(isequal(atan_degrees(-1,-1),-135))\r\n%%\r\nassert(isequal(atan_degrees(1,-1),-45))\r\n%%\r\nassert(isequal(atan_degrees(1,0),0))\r\n%%\r\nassert(isequal(atan_degrees(0,1),90))\r\n%%\r\nassert(isequal(atan_degrees(-1,0),180))\r\n%%\r\nassert(isequal(atan_degrees(0,-1),-90))\r\n","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":3097,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":73,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2012-09-10T03:53:34.000Z","updated_at":"2026-03-06T12:24:34.000Z","published_at":"2012-10-28T17:20:12.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"targetMode\":\"\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"targetMode\":\"\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eReturn in degrees the atan result of inputs for all four quadrants.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:b/\u003e\u003c/w:rPr\u003e\u003cw:t\u003eExamples:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"code\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u003c![CDATA[[x, y] Degrees\\n 1  0     0\\n 1  1    45\\n-1  1   135\\n-1 -1  -135\\n 1 -1   -45\\n-1  0  -180\\n 0 -1   -90]]\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:b/\u003e\u003c/w:rPr\u003e\u003cw:t\u003eInput:\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e [ x , y ]\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:b/\u003e\u003c/w:rPr\u003e\u003cw:t\u003eOutput:\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e Angle : Degrees [ 0:180 ] ( -180:0 ) -180 is not a valid return value\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eNote: Input to atan2 is Y , X not X , Y\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle 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