{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2025-12-14T01:33:56.000Z","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":"2025-12-14T00:00:00.000Z","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":42631,"title":"Cumulative minimum of an array","description":"Find the cumulative minimum of an array without using the built-in function \u003chttp://www.mathworks.com/help/matlab/ref/cummin.html cummin\u003e (and a few others). Your function should act identically to cummin, allowing the same inputs.\r\n\r\n*Examples*\r\n\r\n  If X = [0 4 3\r\n          6 5 2]\r\n\r\n  cumin(X,1) is [0 4 3  and cumin(X,2) is [0 0 0\r\n                 0 4 2]                    6 5 2]\r\n \r\n  cumin(X,1,'reverse') is [0 4 2  and cumin(X,2,'reverse') is [0 3 3\r\n                           6 5 2]                              2 2 2]\r\n\r\n  Also,\r\n  cumin([8 9 1 10 6 1 3 6 10 10]) returns [8 8 1 1 1 1 1 1 1 1]\r\n\r\n  cumin([8 9 1 10 6 1 3 6 10 10]') returns [8 8 1 1 1 1 1 1 1 1]'\r\n\r\nSee also \u003chttp://www.mathworks.com/matlabcentral/cody/problems/42633-cumulative-maximum-of-an-array cumax\u003e.","description_html":"\u003cp\u003eFind the cumulative minimum of an array without using the built-in function \u003ca href = \"http://www.mathworks.com/help/matlab/ref/cummin.html\"\u003ecummin\u003c/a\u003e (and a few others). Your function should act identically to cummin, allowing the same inputs.\u003c/p\u003e\u003cp\u003e\u003cb\u003eExamples\u003c/b\u003e\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003eIf X = [0 4 3\r\n        6 5 2]\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003ecumin(X,1) is [0 4 3  and cumin(X,2) is [0 0 0\r\n               0 4 2]                    6 5 2]\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003ecumin(X,1,'reverse') is [0 4 2  and cumin(X,2,'reverse') is [0 3 3\r\n                         6 5 2]                              2 2 2]\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003eAlso,\r\ncumin([8 9 1 10 6 1 3 6 10 10]) returns [8 8 1 1 1 1 1 1 1 1]\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003ecumin([8 9 1 10 6 1 3 6 10 10]') returns [8 8 1 1 1 1 1 1 1 1]'\r\n\u003c/pre\u003e\u003cp\u003eSee also \u003ca href = \"http://www.mathworks.com/matlabcentral/cody/problems/42633-cumulative-maximum-of-an-array\"\u003ecumax\u003c/a\u003e.\u003c/p\u003e","function_template":"function y = cumin(x,varargin)\r\n  y = [];\r\nend","test_suite":"%%\r\nfiletext = fileread('cumin.m');\r\nassert(isempty(strfind(filetext,'cummin')))\r\nassert(isempty(strfind(filetext,'cummax')))\r\nassert(isempty(strfind(filetext,'feval')))\r\n\r\n%%\r\nx = randi(100);\r\nassert(isequal(cumin(x),cummin(x)))\r\nassert(isequal(cumin(x,1),cummin(x,1)))\r\nassert(isequal(cumin(x,2),cummin(x,2)))\r\nassert(isequal(cumin(x,1,'reverse'),cummin(x,1,'reverse')))\r\nassert(isequal(cumin(x,2,'reverse'),cummin(x,2,'reverse')))\r\nassert(isequal(cumin(x,'reverse'),cummin(x,'reverse')))\r\n\r\n%%\r\nx = randi(100,randi([2 100]),1);\r\nassert(isequal(cumin(x),cummin(x)))\r\nassert(isequal(cumin(x,1),cummin(x,1)))\r\nassert(isequal(cumin(x,2),cummin(x,2)))\r\nassert(isequal(cumin(x,1,'reverse'),cummin(x,1,'reverse')))\r\nassert(isequal(cumin(x,2,'reverse'),cummin(x,2,'reverse')))\r\nassert(isequal(cumin(x,'reverse'),cummin(x,'reverse')))\r\n\r\n%%\r\nx = randi(100,1,randi([2 100]));\r\nassert(isequal(cumin(x),cummin(x)))\r\nassert(isequal(cumin(x,1),cummin(x,1)))\r\nassert(isequal(cumin(x,2),cummin(x,2)))\r\nassert(isequal(cumin(x,1,'reverse'),cummin(x,1,'reverse')))\r\nassert(isequal(cumin(x,2,'reverse'),cummin(x,2,'reverse')))\r\nassert(isequal(cumin(x,'reverse'),cummin(x,'reverse')))\r\n\r\n%%\r\nx = magic(10);\r\nassert(isequal(cumin(x),cummin(x)))\r\nassert(isequal(cumin(x,1),cummin(x,1)))\r\nassert(isequal(cumin(x,2),cummin(x,2)))\r\nassert(isequal(cumin(x,1,'reverse'),cummin(x,1,'reverse')))\r\nassert(isequal(cumin(x,2,'reverse'),cummin(x,2,'reverse')))\r\nassert(isequal(cumin(x,'reverse'),cummin(x,'reverse')))\r\n\r\n%%\r\nx = [];\r\nassert(isequal(cumin(x),cummin(x)))\r\nassert(isequal(cumin(x,1),cummin(x,1)))\r\nassert(isequal(cumin(x,2),cummin(x,2)))\r\nassert(isequal(cumin(x,1,'reverse'),cummin(x,1,'reverse')))\r\nassert(isequal(cumin(x,2,'reverse'),cummin(x,2,'reverse')))\r\nassert(isequal(cumin(x,'reverse'),cummin(x,'reverse')))","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":4793,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":42,"test_suite_updated_at":"2015-09-24T04:46:57.000Z","rescore_all_solutions":false,"group_id":24,"created_at":"2015-09-22T21:12:22.000Z","updated_at":"2026-04-01T07:07:43.000Z","published_at":"2015-09-23T19:24:39.000Z","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\u003eFind the cumulative minimum of an array without using the built-in function\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"http://www.mathworks.com/help/matlab/ref/cummin.html\\\"\u003e\u003cw:r\u003e\u003cw:t\u003ecummin\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e (and a few others). Your function should act identically to cummin, allowing the same inputs.\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[If X = [0 4 3\\n        6 5 2]\\n\\ncumin(X,1) is [0 4 3  and cumin(X,2) is [0 0 0\\n               0 4 2]                    6 5 2]\\n\\ncumin(X,1,'reverse') is [0 4 2  and cumin(X,2,'reverse') is [0 3 3\\n                         6 5 2]                              2 2 2]\\n\\nAlso,\\ncumin([8 9 1 10 6 1 3 6 10 10]) returns [8 8 1 1 1 1 1 1 1 1]\\n\\ncumin([8 9 1 10 6 1 3 6 10 10]') returns [8 8 1 1 1 1 1 1 1 1]']]\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\u003eSee also\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"http://www.mathworks.com/matlabcentral/cody/problems/42633-cumulative-maximum-of-an-array\\\"\u003e\u003cw:r\u003e\u003cw:t\u003ecumax\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\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":42631,"title":"Cumulative minimum of an array","description":"Find the cumulative minimum of an array without using the built-in function \u003chttp://www.mathworks.com/help/matlab/ref/cummin.html cummin\u003e (and a few others). Your function should act identically to cummin, allowing the same inputs.\r\n\r\n*Examples*\r\n\r\n  If X = [0 4 3\r\n          6 5 2]\r\n\r\n  cumin(X,1) is [0 4 3  and cumin(X,2) is [0 0 0\r\n                 0 4 2]                    6 5 2]\r\n \r\n  cumin(X,1,'reverse') is [0 4 2  and cumin(X,2,'reverse') is [0 3 3\r\n                           6 5 2]                              2 2 2]\r\n\r\n  Also,\r\n  cumin([8 9 1 10 6 1 3 6 10 10]) returns [8 8 1 1 1 1 1 1 1 1]\r\n\r\n  cumin([8 9 1 10 6 1 3 6 10 10]') returns [8 8 1 1 1 1 1 1 1 1]'\r\n\r\nSee also \u003chttp://www.mathworks.com/matlabcentral/cody/problems/42633-cumulative-maximum-of-an-array cumax\u003e.","description_html":"\u003cp\u003eFind the cumulative minimum of an array without using the built-in function \u003ca href = \"http://www.mathworks.com/help/matlab/ref/cummin.html\"\u003ecummin\u003c/a\u003e (and a few others). Your function should act identically to cummin, allowing the same inputs.\u003c/p\u003e\u003cp\u003e\u003cb\u003eExamples\u003c/b\u003e\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003eIf X = [0 4 3\r\n        6 5 2]\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003ecumin(X,1) is [0 4 3  and cumin(X,2) is [0 0 0\r\n               0 4 2]                    6 5 2]\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003ecumin(X,1,'reverse') is [0 4 2  and cumin(X,2,'reverse') is [0 3 3\r\n                         6 5 2]                              2 2 2]\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003eAlso,\r\ncumin([8 9 1 10 6 1 3 6 10 10]) returns [8 8 1 1 1 1 1 1 1 1]\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003ecumin([8 9 1 10 6 1 3 6 10 10]') returns [8 8 1 1 1 1 1 1 1 1]'\r\n\u003c/pre\u003e\u003cp\u003eSee also \u003ca href = \"http://www.mathworks.com/matlabcentral/cody/problems/42633-cumulative-maximum-of-an-array\"\u003ecumax\u003c/a\u003e.\u003c/p\u003e","function_template":"function y = cumin(x,varargin)\r\n  y = [];\r\nend","test_suite":"%%\r\nfiletext = fileread('cumin.m');\r\nassert(isempty(strfind(filetext,'cummin')))\r\nassert(isempty(strfind(filetext,'cummax')))\r\nassert(isempty(strfind(filetext,'feval')))\r\n\r\n%%\r\nx = randi(100);\r\nassert(isequal(cumin(x),cummin(x)))\r\nassert(isequal(cumin(x,1),cummin(x,1)))\r\nassert(isequal(cumin(x,2),cummin(x,2)))\r\nassert(isequal(cumin(x,1,'reverse'),cummin(x,1,'reverse')))\r\nassert(isequal(cumin(x,2,'reverse'),cummin(x,2,'reverse')))\r\nassert(isequal(cumin(x,'reverse'),cummin(x,'reverse')))\r\n\r\n%%\r\nx = randi(100,randi([2 100]),1);\r\nassert(isequal(cumin(x),cummin(x)))\r\nassert(isequal(cumin(x,1),cummin(x,1)))\r\nassert(isequal(cumin(x,2),cummin(x,2)))\r\nassert(isequal(cumin(x,1,'reverse'),cummin(x,1,'reverse')))\r\nassert(isequal(cumin(x,2,'reverse'),cummin(x,2,'reverse')))\r\nassert(isequal(cumin(x,'reverse'),cummin(x,'reverse')))\r\n\r\n%%\r\nx = randi(100,1,randi([2 100]));\r\nassert(isequal(cumin(x),cummin(x)))\r\nassert(isequal(cumin(x,1),cummin(x,1)))\r\nassert(isequal(cumin(x,2),cummin(x,2)))\r\nassert(isequal(cumin(x,1,'reverse'),cummin(x,1,'reverse')))\r\nassert(isequal(cumin(x,2,'reverse'),cummin(x,2,'reverse')))\r\nassert(isequal(cumin(x,'reverse'),cummin(x,'reverse')))\r\n\r\n%%\r\nx = magic(10);\r\nassert(isequal(cumin(x),cummin(x)))\r\nassert(isequal(cumin(x,1),cummin(x,1)))\r\nassert(isequal(cumin(x,2),cummin(x,2)))\r\nassert(isequal(cumin(x,1,'reverse'),cummin(x,1,'reverse')))\r\nassert(isequal(cumin(x,2,'reverse'),cummin(x,2,'reverse')))\r\nassert(isequal(cumin(x,'reverse'),cummin(x,'reverse')))\r\n\r\n%%\r\nx = [];\r\nassert(isequal(cumin(x),cummin(x)))\r\nassert(isequal(cumin(x,1),cummin(x,1)))\r\nassert(isequal(cumin(x,2),cummin(x,2)))\r\nassert(isequal(cumin(x,1,'reverse'),cummin(x,1,'reverse')))\r\nassert(isequal(cumin(x,2,'reverse'),cummin(x,2,'reverse')))\r\nassert(isequal(cumin(x,'reverse'),cummin(x,'reverse')))","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":4793,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":42,"test_suite_updated_at":"2015-09-24T04:46:57.000Z","rescore_all_solutions":false,"group_id":24,"created_at":"2015-09-22T21:12:22.000Z","updated_at":"2026-04-01T07:07:43.000Z","published_at":"2015-09-23T19:24:39.000Z","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\u003eFind the cumulative minimum of an array without using the built-in function\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"http://www.mathworks.com/help/matlab/ref/cummin.html\\\"\u003e\u003cw:r\u003e\u003cw:t\u003ecummin\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e (and a few others). Your function should act identically to cummin, allowing the same inputs.\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[If X = [0 4 3\\n        6 5 2]\\n\\ncumin(X,1) is [0 4 3  and cumin(X,2) is [0 0 0\\n               0 4 2]                    6 5 2]\\n\\ncumin(X,1,'reverse') is [0 4 2  and cumin(X,2,'reverse') is [0 3 3\\n                         6 5 2]                              2 2 2]\\n\\nAlso,\\ncumin([8 9 1 10 6 1 3 6 10 10]) returns [8 8 1 1 1 1 1 1 1 1]\\n\\ncumin([8 9 1 10 6 1 3 6 10 10]') returns [8 8 1 1 1 1 1 1 1 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