{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2026-04-06T14:01:22.000Z","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":"2026-04-06T00:00:00.000Z","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":42318,"title":"Evened up (or not)","description":"You will be provided with an array or matrix that contains various numbers, in addition to an evening variable, e, set to 1 or 0. If e==1, then you should return an evened version of the matrix, wherein all odd numbers have one added to them to make them even. For example, \r\n\r\n* if M = 1:10, \r\n* then the evened array is [2,2,4,4,6,6,8,8,10,10].\r\n\r\nOn the other hand, if e==0, then you should return the same matrix with only odd numbers, wherein one has been added to every even number. For example,\r\n\r\n* if M = 1:10, \r\n* then the odd array is [1,3,3,5,5,7,7,9,9,11].","description_html":"\u003cp\u003eYou will be provided with an array or matrix that contains various numbers, in addition to an evening variable, e, set to 1 or 0. If e==1, then you should return an evened version of the matrix, wherein all odd numbers have one added to them to make them even. For example,\u003c/p\u003e\u003cul\u003e\u003cli\u003eif M = 1:10,\u003c/li\u003e\u003cli\u003ethen the evened array is [2,2,4,4,6,6,8,8,10,10].\u003c/li\u003e\u003c/ul\u003e\u003cp\u003eOn the other hand, if e==0, then you should return the same matrix with only odd numbers, wherein one has been added to every even number. For example,\u003c/p\u003e\u003cul\u003e\u003cli\u003eif M = 1:10,\u003c/li\u003e\u003cli\u003ethen the odd array is [1,3,3,5,5,7,7,9,9,11].\u003c/li\u003e\u003c/ul\u003e","function_template":"function [M] = evened_up(M,e)\r\n\r\nM = M;\r\n\r\nend\r\n","test_suite":"%%\r\nM = 1:10;\r\ne = 1;\r\nM_corr = [2,2,4,4,6,6,8,8,10,10];\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = 1:10;\r\ne = 0;\r\nM_corr = [1,3,3,5,5,7,7,9,9,11];\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = 20:3:50;\r\ne = 1;\r\nM_corr = [20,24,26,30,32,36,38,42,44,48,50];\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = 20:3:50;\r\ne = 0;\r\nM_corr = [21,23,27,29,33,35,39,41,45,47,51];\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = 2:2:100;\r\ne = 1;\r\nM_corr = M;\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = 2:2:100;\r\ne = 0;\r\nM_corr = M+1;\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = ones(3);\r\ne = 1;\r\nM_corr = M*2;\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = magic(3);\r\ne = 0;\r\nM_corr = [9,1,7;3,5,7;5,9,3];\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = magic(3);\r\ne = 1;\r\nM_corr = [8,2,6;4,6,8;4,10,2];\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = eye(4);\r\ne = 1;\r\nM_corr = M*2;\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = eye(4);\r\ne = 0;\r\nM_corr = ones(4);\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nind = randi(4);\r\nswitch ind\r\n\tcase 1\r\n\t\tM = 1:10;\r\n\t\te = 1;\r\n\t\tM_corr = [2,2,4,4,6,6,8,8,10,10];\r\n\tcase 2\r\n\t\tM = 20:3:50;\r\n\t\te = 1;\r\n\t\tM_corr = [20,24,26,30,32,36,38,42,44,48,50];\r\n\tcase 3\r\n\t\tM = ones(3);\r\n\t\te = 1;\r\n\t\tM_corr = M*2;\r\n\tcase 4\r\n\t\tM = eye(4);\r\n\t\te = 0;\r\n\t\tM_corr = ones(4);\r\nend\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nind = randi(4);\r\nswitch ind\r\n\tcase 1\r\n\t\tM = 2:2:100;\r\n\t\te = 0;\r\n\t\tM_corr = M+1;\r\n\tcase 2\r\n\t\tM = 1:10;\r\n\t\te = 0;\r\n\t\tM_corr = [1,3,3,5,5,7,7,9,9,11];\r\n\tcase 3\r\n\t\tM = 1:10;\r\n\t\te = 1;\r\n\t\tM_corr = [2,2,4,4,6,6,8,8,10,10];\r\n\tcase 4\r\n\t\tM = magic(3);\r\n\t\te = 0;\r\n\t\tM_corr = [9,1,7;3,5,7;5,9,3];\r\nend\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nind = randi(4);\r\nswitch ind\r\n\tcase 1\r\n\t\tM = eye(4);\r\n\t\te = 0;\r\n\t\tM_corr = ones(4);\r\n\tcase 2\r\n\t\tM = ones(3);\r\n\t\te = 1;\r\n\t\tM_corr = M*2;\r\n\tcase 3\r\n\t\tM = 20:3:50;\r\n\t\te = 1;\r\n\t\tM_corr = [20,24,26,30,32,36,38,42,44,48,50];\r\n\tcase 4\r\n\t\tM = 2:2:100;\r\n\t\te = 1;\r\n\t\tM_corr = M;\r\nend\r\nassert(isequal(evened_up(M,e),M_corr))\r\n","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":26769,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":175,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":45,"created_at":"2015-05-17T02:32:54.000Z","updated_at":"2026-04-02T10:10:53.000Z","published_at":"2015-05-17T02:32:54.000Z","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\u003eYou will be provided with an array or matrix that contains various numbers, in addition to an evening variable, e, set to 1 or 0. If e==1, then you should return an evened version of the matrix, wherein all odd numbers have one added to them to make them even. For example,\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eif M = 1:10,\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003ethen the evened array is [2,2,4,4,6,6,8,8,10,10].\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\u003eOn the other hand, if e==0, then you should return the same matrix with only odd numbers, wherein one has been added to every even number. For example,\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eif M = 1:10,\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003ethen the odd array is [1,3,3,5,5,7,7,9,9,11].\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":42318,"title":"Evened up (or not)","description":"You will be provided with an array or matrix that contains various numbers, in addition to an evening variable, e, set to 1 or 0. If e==1, then you should return an evened version of the matrix, wherein all odd numbers have one added to them to make them even. For example, \r\n\r\n* if M = 1:10, \r\n* then the evened array is [2,2,4,4,6,6,8,8,10,10].\r\n\r\nOn the other hand, if e==0, then you should return the same matrix with only odd numbers, wherein one has been added to every even number. For example,\r\n\r\n* if M = 1:10, \r\n* then the odd array is [1,3,3,5,5,7,7,9,9,11].","description_html":"\u003cp\u003eYou will be provided with an array or matrix that contains various numbers, in addition to an evening variable, e, set to 1 or 0. If e==1, then you should return an evened version of the matrix, wherein all odd numbers have one added to them to make them even. For example,\u003c/p\u003e\u003cul\u003e\u003cli\u003eif M = 1:10,\u003c/li\u003e\u003cli\u003ethen the evened array is [2,2,4,4,6,6,8,8,10,10].\u003c/li\u003e\u003c/ul\u003e\u003cp\u003eOn the other hand, if e==0, then you should return the same matrix with only odd numbers, wherein one has been added to every even number. For example,\u003c/p\u003e\u003cul\u003e\u003cli\u003eif M = 1:10,\u003c/li\u003e\u003cli\u003ethen the odd array is [1,3,3,5,5,7,7,9,9,11].\u003c/li\u003e\u003c/ul\u003e","function_template":"function [M] = evened_up(M,e)\r\n\r\nM = M;\r\n\r\nend\r\n","test_suite":"%%\r\nM = 1:10;\r\ne = 1;\r\nM_corr = [2,2,4,4,6,6,8,8,10,10];\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = 1:10;\r\ne = 0;\r\nM_corr = [1,3,3,5,5,7,7,9,9,11];\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = 20:3:50;\r\ne = 1;\r\nM_corr = [20,24,26,30,32,36,38,42,44,48,50];\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = 20:3:50;\r\ne = 0;\r\nM_corr = [21,23,27,29,33,35,39,41,45,47,51];\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = 2:2:100;\r\ne = 1;\r\nM_corr = M;\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = 2:2:100;\r\ne = 0;\r\nM_corr = M+1;\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = ones(3);\r\ne = 1;\r\nM_corr = M*2;\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = magic(3);\r\ne = 0;\r\nM_corr = [9,1,7;3,5,7;5,9,3];\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = magic(3);\r\ne = 1;\r\nM_corr = [8,2,6;4,6,8;4,10,2];\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = eye(4);\r\ne = 1;\r\nM_corr = M*2;\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nM = eye(4);\r\ne = 0;\r\nM_corr = ones(4);\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nind = randi(4);\r\nswitch ind\r\n\tcase 1\r\n\t\tM = 1:10;\r\n\t\te = 1;\r\n\t\tM_corr = [2,2,4,4,6,6,8,8,10,10];\r\n\tcase 2\r\n\t\tM = 20:3:50;\r\n\t\te = 1;\r\n\t\tM_corr = [20,24,26,30,32,36,38,42,44,48,50];\r\n\tcase 3\r\n\t\tM = ones(3);\r\n\t\te = 1;\r\n\t\tM_corr = M*2;\r\n\tcase 4\r\n\t\tM = eye(4);\r\n\t\te = 0;\r\n\t\tM_corr = ones(4);\r\nend\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nind = randi(4);\r\nswitch ind\r\n\tcase 1\r\n\t\tM = 2:2:100;\r\n\t\te = 0;\r\n\t\tM_corr = M+1;\r\n\tcase 2\r\n\t\tM = 1:10;\r\n\t\te = 0;\r\n\t\tM_corr = [1,3,3,5,5,7,7,9,9,11];\r\n\tcase 3\r\n\t\tM = 1:10;\r\n\t\te = 1;\r\n\t\tM_corr = [2,2,4,4,6,6,8,8,10,10];\r\n\tcase 4\r\n\t\tM = magic(3);\r\n\t\te = 0;\r\n\t\tM_corr = [9,1,7;3,5,7;5,9,3];\r\nend\r\nassert(isequal(evened_up(M,e),M_corr))\r\n\r\n%%\r\nind = randi(4);\r\nswitch ind\r\n\tcase 1\r\n\t\tM = eye(4);\r\n\t\te = 0;\r\n\t\tM_corr = ones(4);\r\n\tcase 2\r\n\t\tM = ones(3);\r\n\t\te = 1;\r\n\t\tM_corr = M*2;\r\n\tcase 3\r\n\t\tM = 20:3:50;\r\n\t\te = 1;\r\n\t\tM_corr = [20,24,26,30,32,36,38,42,44,48,50];\r\n\tcase 4\r\n\t\tM = 2:2:100;\r\n\t\te = 1;\r\n\t\tM_corr = M;\r\nend\r\nassert(isequal(evened_up(M,e),M_corr))\r\n","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":26769,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":175,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":45,"created_at":"2015-05-17T02:32:54.000Z","updated_at":"2026-04-02T10:10:53.000Z","published_at":"2015-05-17T02:32:54.000Z","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\u003eYou will be provided with an array or matrix that contains various numbers, in addition to an evening variable, e, set to 1 or 0. If e==1, then you should return an evened version of the matrix, wherein all odd numbers have one added to them to make them even. For example,\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eif M = 1:10,\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003ethen the evened array is [2,2,4,4,6,6,8,8,10,10].\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\u003eOn the other hand, if e==0, then you should return the same matrix with only odd numbers, wherein one has been added to every even number. For example,\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eif M = 1:10,\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003ethen the odd array is [1,3,3,5,5,7,7,9,9,11].\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\"}]}"}],"term":"difficulty_rating_bin:easy group:\"Number Manipulation 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