{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2026-07-05T00:54:32.000Z","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":"2026-07-05T00:00:00.000Z","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":61418,"title":"Play the Disk ","description":"To access the memory address of program on disk, MS-DOS uses sectors,cylinders and heads, on disk in 3D coordinates. Given the head angle position (in deg), cylinders and heads locate the logical sector number to access the program on disk ","description_html":"\u003cdiv style = \"text-align: start; line-height: 20.44px; min-height: 0px; white-space: normal; color: rgb(33, 33, 33); font-family: Menlo, Monaco, Consolas, monospace; font-style: normal; font-size: 14px; font-weight: 400; text-decoration: none; white-space: normal; \"\u003e\u003cdiv style=\"block-size: 63px; display: block; min-width: 0px; padding-block-start: 0px; padding-inline-start: 2px; padding-left: 2px; padding-top: 0px; perspective-origin: 401px 31.5px; transform-origin: 401px 31.5px; vertical-align: baseline; \"\u003e\u003cdiv style=\"font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; padding-inline-start: 0px; padding-left: 0px; perspective-origin: 377px 31.5px; text-align: left; transform-origin: 377px 31.5px; white-space-collapse: preserve; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; unicode-bidi: normal; \"\u003e\u003cspan style=\"\"\u003eTo access the memory address of program on disk, MS-DOS uses sectors,cylinders and heads, on disk in 3D coordinates. Given the head angle position (in deg), cylinders and heads locate the logical sector number to access the program on disk \u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003c/div\u003e\u003c/div\u003e","function_template":"function y = disk_sector_name(x)\r\n  y = x;\r\nend","test_suite":"%%\r\nhead_ref = 90;\r\nnum_heads = 6\r\ncylinder = 2\r\nsector = 4;\r\nhead = 5;\r\ny_correct = 71;\r\nassert(isequal(disk_sector_name(head_ref,num_heads,cylinder,sector,head),y_correct))\r\n\r\n%%\r\nhead_ref = 45;\r\nnum_heads = 5\r\ncylinder = 1\r\nsector = 1;\r\nhead = 3;\r\ny_correct = 64;\r\nassert(isequal(disk_sector_name(head_ref,num_heads,cylinder,sector,head),y_correct))\r\n","published":true,"deleted":false,"likes_count":0,"comments_count":1,"created_by":584788,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":4,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2026-07-05T07:02:36.000Z","updated_at":"2026-07-05T16:25:27.000Z","published_at":"2026-07-05T07:02:36.000Z","restored_at":null,"restored_by":null,"spam":null,"simulink":false,"admin_reviewed":false,"description_opc":"{\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\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\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eTo access the memory address of program on disk, MS-DOS uses sectors,cylinders and heads, on disk in 3D coordinates. Given the head angle position (in deg), cylinders and heads locate the logical sector number to access the program on disk \u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\",\"relationship\":null}],\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"target\":\"/matlab/document.xml\",\"relationshipId\":\"rId1\"}]}"}],"problem_search":{"problems":[{"id":61418,"title":"Play the Disk ","description":"To access the memory address of program on disk, MS-DOS uses sectors,cylinders and heads, on disk in 3D coordinates. Given the head angle position (in deg), cylinders and heads locate the logical sector number to access the program on disk ","description_html":"\u003cdiv style = \"text-align: start; line-height: 20.44px; min-height: 0px; white-space: normal; color: rgb(33, 33, 33); font-family: Menlo, Monaco, Consolas, monospace; font-style: normal; font-size: 14px; font-weight: 400; text-decoration: none; white-space: normal; \"\u003e\u003cdiv style=\"block-size: 63px; display: block; min-width: 0px; padding-block-start: 0px; padding-inline-start: 2px; padding-left: 2px; padding-top: 0px; perspective-origin: 401px 31.5px; transform-origin: 401px 31.5px; vertical-align: baseline; \"\u003e\u003cdiv style=\"font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; padding-inline-start: 0px; padding-left: 0px; perspective-origin: 377px 31.5px; text-align: left; transform-origin: 377px 31.5px; white-space-collapse: preserve; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; unicode-bidi: normal; \"\u003e\u003cspan style=\"\"\u003eTo access the memory address of program on disk, MS-DOS uses sectors,cylinders and heads, on disk in 3D coordinates. Given the head angle position (in deg), cylinders and heads locate the logical sector number to access the program on disk \u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003c/div\u003e\u003c/div\u003e","function_template":"function y = disk_sector_name(x)\r\n  y = x;\r\nend","test_suite":"%%\r\nhead_ref = 90;\r\nnum_heads = 6\r\ncylinder = 2\r\nsector = 4;\r\nhead = 5;\r\ny_correct = 71;\r\nassert(isequal(disk_sector_name(head_ref,num_heads,cylinder,sector,head),y_correct))\r\n\r\n%%\r\nhead_ref = 45;\r\nnum_heads = 5\r\ncylinder = 1\r\nsector = 1;\r\nhead = 3;\r\ny_correct = 64;\r\nassert(isequal(disk_sector_name(head_ref,num_heads,cylinder,sector,head),y_correct))\r\n","published":true,"deleted":false,"likes_count":0,"comments_count":1,"created_by":584788,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":4,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2026-07-05T07:02:36.000Z","updated_at":"2026-07-05T16:25:27.000Z","published_at":"2026-07-05T07:02:36.000Z","restored_at":null,"restored_by":null,"spam":null,"simulink":false,"admin_reviewed":false,"description_opc":"{\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\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\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eTo access the memory address of program on disk, MS-DOS uses sectors,cylinders and heads, on disk in 3D coordinates. 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