{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2026-06-15T00:16:26.000Z","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":"2026-06-15T00:00:00.000Z","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":44646,"title":"Draw a 'Z'.","description":"Given _n_ as input, generate a  n-by-n matrix like 'Z' by _0_  and _1_ .\r\n\r\nExample:\r\n\r\n  n=5\r\n  ans=\r\n  [1 1 1 1 1\r\n   0 0 0 1 0\r\n   0 0 1 0 0\r\n   0 1 0 0 0\r\n   1 1 1 1 1]\r\n","description_html":"\u003cp\u003eGiven \u003ci\u003en\u003c/i\u003e as input, generate a  n-by-n matrix like 'Z' by \u003ci\u003e0\u003c/i\u003e  and \u003ci\u003e1\u003c/i\u003e .\u003c/p\u003e\u003cp\u003eExample:\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003en=5\r\nans=\r\n[1 1 1 1 1\r\n 0 0 0 1 0\r\n 0 0 1 0 0\r\n 0 1 0 0 0\r\n 1 1 1 1 1]\r\n\u003c/pre\u003e","function_template":"function ans = Z(n)\r\n  zeros(n)\r\nend","test_suite":"%%\r\nn = 3;\r\ny_correct = [1 1 1;0 1 0;1 1 1];\r\nassert(isequal(Z(n),y_correct))\r\n%%\r\nn = 4;\r\ny_correct = [1 1 1 1;0 0 1 0; 0 1 0 0; 1 1 1 1];\r\nassert(isequal(Z(n),y_correct))\r\n%%\r\nn = 5;\r\ny_correct = [1 1 1 1 1; 0 0 0 1 0;  0 0 1 0 0;  0 1 0 0 0;  1 1 1 1 1];\r\nassert(isequal(Z(n),y_correct))\r\n\r\n","published":true,"deleted":false,"likes_count":12,"comments_count":1,"created_by":218677,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":933,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":46,"created_at":"2018-05-19T18:58:36.000Z","updated_at":"2026-06-08T13:52:26.000Z","published_at":"2018-05-19T18:58:36.000Z","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\u003eGiven\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003en\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e as input, generate a n-by-n matrix like 'Z' by\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003e0\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e and\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003e1\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\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\u003eExample:\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[n=5\\nans=\\n[1 1 1 1 1\\n 0 0 0 1 0\\n 0 0 1 0 0\\n 0 1 0 0 0\\n 1 1 1 1 1]]]\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":{"problems":[{"id":44646,"title":"Draw a 'Z'.","description":"Given _n_ as input, generate a  n-by-n matrix like 'Z' by _0_  and _1_ .\r\n\r\nExample:\r\n\r\n  n=5\r\n  ans=\r\n  [1 1 1 1 1\r\n   0 0 0 1 0\r\n   0 0 1 0 0\r\n   0 1 0 0 0\r\n   1 1 1 1 1]\r\n","description_html":"\u003cp\u003eGiven \u003ci\u003en\u003c/i\u003e as input, generate a  n-by-n matrix like 'Z' by \u003ci\u003e0\u003c/i\u003e  and \u003ci\u003e1\u003c/i\u003e .\u003c/p\u003e\u003cp\u003eExample:\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003en=5\r\nans=\r\n[1 1 1 1 1\r\n 0 0 0 1 0\r\n 0 0 1 0 0\r\n 0 1 0 0 0\r\n 1 1 1 1 1]\r\n\u003c/pre\u003e","function_template":"function ans = Z(n)\r\n  zeros(n)\r\nend","test_suite":"%%\r\nn = 3;\r\ny_correct = [1 1 1;0 1 0;1 1 1];\r\nassert(isequal(Z(n),y_correct))\r\n%%\r\nn = 4;\r\ny_correct = [1 1 1 1;0 0 1 0; 0 1 0 0; 1 1 1 1];\r\nassert(isequal(Z(n),y_correct))\r\n%%\r\nn = 5;\r\ny_correct = [1 1 1 1 1; 0 0 0 1 0;  0 0 1 0 0;  0 1 0 0 0;  1 1 1 1 1];\r\nassert(isequal(Z(n),y_correct))\r\n\r\n","published":true,"deleted":false,"likes_count":12,"comments_count":1,"created_by":218677,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":933,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":46,"created_at":"2018-05-19T18:58:36.000Z","updated_at":"2026-06-08T13:52:26.000Z","published_at":"2018-05-19T18:58:36.000Z","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\u003eGiven\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003en\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e as input, generate a n-by-n matrix like 'Z' by\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003e0\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e and\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003e1\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\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\u003eExample:\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[n=5\\nans=\\n[1 1 1 1 1\\n 0 0 0 1 0\\n 0 0 1 0 0\\n 0 1 0 0 0\\n 1 1 1 1 1]]]\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\"}]}"}],"errors":[],"facets":[[{"value":"Draw Letters","count":1,"selected":false}],[{"value":"medium","count":1,"selected":false}]],"term":"tag:\"z\"","page":1,"per_page":50,"sort":"map(difficulty_value,0,0,999) asc"}}