{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2026-04-16T00:12:35.000Z","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":"2026-04-16T00:00:00.000Z","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":1737,"title":"The sum of individual numbers...","description":"Well this one is taking a number and then summing the individual parts till you reach a value of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 0 (only if the original is 0 the answer will be 0).  For example:\r\n  \r\n  x = [103]; So ---\u003e 1+0+3 = 4\r\n  output  = 4;\r\n\r\nanother example:\r\n\r\n  x = [99]; So ---\u003e 9+9 = 18  ---\u003e 1+8 = 9\r\n  output  = 9;\r\n\r\nanother example:\r\n  \r\n  x = [1199]; So ---\u003e 1+1+9+9 = 20  ---\u003e 2+0 = 2\r\n  output  = 2;\r\n\r\n\r\nanother example:\r\n\r\n  x = [11 3]; So ---\u003e 1+1 = 2 and  3 = 3\r\n  output  = [2 3];\r\n","description_html":"\u003cp\u003eWell this one is taking a number and then summing the individual parts till you reach a value of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 0 (only if the original is 0 the answer will be 0).  For example:\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003ex = [103]; So ---\u003e 1+0+3 = 4\r\noutput  = 4;\r\n\u003c/pre\u003e\u003cp\u003eanother example:\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003ex = [99]; So ---\u003e 9+9 = 18  ---\u003e 1+8 = 9\r\noutput  = 9;\r\n\u003c/pre\u003e\u003cp\u003eanother example:\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003ex = [1199]; So ---\u003e 1+1+9+9 = 20  ---\u003e 2+0 = 2\r\noutput  = 2;\r\n\u003c/pre\u003e\u003cp\u003eanother example:\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003ex = [11 3]; So ---\u003e 1+1 = 2 and  3 = 3\r\noutput  = [2 3];\r\n\u003c/pre\u003e","function_template":"function y = individualNumSum(x)\r\ny = x;\r\nend","test_suite":"%%\r\nx = [1];\r\ny = [1];\r\nassert(isequal(individualNumSum(x),y))\r\n%%\r\nx = [103];\r\ny = [4];\r\nassert(isequal(individualNumSum(x),y))\r\n%%\r\nx=[189 22 39 88 55 485 769 215 3685 4589];\r\ny = [9 4 3 7 1 8 4 8 4 8];\r\nassert(isequal(individualNumSum(x),y))\r\n%%\r\nx=[1111 2222 3333 4444 5555 6666 7777 8888 9999 0];\r\ny = [4 8 3 7 2 6 1 5 9 0];\r\nassert(isequal(individualNumSum(x),y))\r\n%%\r\nx=[111 222 333 444 555 666 777 888 999 0];\r\ny = [3 6 9 3 6 9 3 6 9 0];\r\nassert(isequal(individualNumSum(x),y))\r\n%%\r\nx=[11 3];\r\ny = [2 3];\r\nassert(isequal(individualNumSum(x),y))","published":true,"deleted":false,"likes_count":3,"comments_count":0,"created_by":15013,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":85,"test_suite_updated_at":"2013-07-22T18:34:35.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2013-07-22T18:22:26.000Z","updated_at":"2026-04-02T15:51:44.000Z","published_at":"2013-07-22T18:34:35.000Z","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\u003eWell this one is taking a number and then summing the individual parts till you reach a value of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 0 (only if the original is 0 the answer will be 0). For example:\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 = [103]; So ---\u003e 1+0+3 = 4\\noutput  = 4;]]\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:t\u003eanother example:\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 = [99]; So ---\u003e 9+9 = 18  ---\u003e 1+8 = 9\\noutput  = 9;]]\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:t\u003eanother example:\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 = [1199]; So ---\u003e 1+1+9+9 = 20  ---\u003e 2+0 = 2\\noutput  = 2;]]\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:t\u003eanother example:\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 = [11 3]; So ---\u003e 1+1 = 2 and  3 = 3\\noutput  = [2 3];]]\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"}],"problem_search":{"errors":[],"problems":[{"id":1737,"title":"The sum of individual numbers...","description":"Well this one is taking a number and then summing the individual parts till you reach a value of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 0 (only if the original is 0 the answer will be 0).  For example:\r\n  \r\n  x = [103]; So ---\u003e 1+0+3 = 4\r\n  output  = 4;\r\n\r\nanother example:\r\n\r\n  x = [99]; So ---\u003e 9+9 = 18  ---\u003e 1+8 = 9\r\n  output  = 9;\r\n\r\nanother example:\r\n  \r\n  x = [1199]; So ---\u003e 1+1+9+9 = 20  ---\u003e 2+0 = 2\r\n  output  = 2;\r\n\r\n\r\nanother example:\r\n\r\n  x = [11 3]; So ---\u003e 1+1 = 2 and  3 = 3\r\n  output  = [2 3];\r\n","description_html":"\u003cp\u003eWell this one is taking a number and then summing the individual parts till you reach a value of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 0 (only if the original is 0 the answer will be 0).  For example:\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003ex = [103]; So ---\u003e 1+0+3 = 4\r\noutput  = 4;\r\n\u003c/pre\u003e\u003cp\u003eanother example:\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003ex = [99]; So ---\u003e 9+9 = 18  ---\u003e 1+8 = 9\r\noutput  = 9;\r\n\u003c/pre\u003e\u003cp\u003eanother example:\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003ex = [1199]; So ---\u003e 1+1+9+9 = 20  ---\u003e 2+0 = 2\r\noutput  = 2;\r\n\u003c/pre\u003e\u003cp\u003eanother example:\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003ex = [11 3]; So ---\u003e 1+1 = 2 and  3 = 3\r\noutput  = [2 3];\r\n\u003c/pre\u003e","function_template":"function y = individualNumSum(x)\r\ny = x;\r\nend","test_suite":"%%\r\nx = [1];\r\ny = [1];\r\nassert(isequal(individualNumSum(x),y))\r\n%%\r\nx = [103];\r\ny = [4];\r\nassert(isequal(individualNumSum(x),y))\r\n%%\r\nx=[189 22 39 88 55 485 769 215 3685 4589];\r\ny = [9 4 3 7 1 8 4 8 4 8];\r\nassert(isequal(individualNumSum(x),y))\r\n%%\r\nx=[1111 2222 3333 4444 5555 6666 7777 8888 9999 0];\r\ny = [4 8 3 7 2 6 1 5 9 0];\r\nassert(isequal(individualNumSum(x),y))\r\n%%\r\nx=[111 222 333 444 555 666 777 888 999 0];\r\ny = [3 6 9 3 6 9 3 6 9 0];\r\nassert(isequal(individualNumSum(x),y))\r\n%%\r\nx=[11 3];\r\ny = [2 3];\r\nassert(isequal(individualNumSum(x),y))","published":true,"deleted":false,"likes_count":3,"comments_count":0,"created_by":15013,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":85,"test_suite_updated_at":"2013-07-22T18:34:35.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2013-07-22T18:22:26.000Z","updated_at":"2026-04-02T15:51:44.000Z","published_at":"2013-07-22T18:34:35.000Z","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\u003eWell this one is taking a number and then summing the individual parts till you reach a value of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 0 (only if the original is 0 the answer will be 0). For example:\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 = [103]; So ---\u003e 1+0+3 = 4\\noutput  = 4;]]\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:t\u003eanother example:\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 = [99]; So ---\u003e 9+9 = 18  ---\u003e 1+8 = 9\\noutput  = 9;]]\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:t\u003eanother example:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle 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