{"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":576,"title":"Return elements unique to either input","description":"Given two numeric inputs a and b, return a row vector that contains the numbers found in only a or only b, but not both.  For example, the inputs:\r\n\r\na=[1 2 3 4 5];\r\n\r\nb=[2 3 4 5 6];\r\n\r\nwould return [1 6], as 2, 3, 4 and 5 are in both a and b, and can therefore be eliminated.  Please sort the returned vector in order from lowest to highest.\r\n\r\nYou may assume that there is at least one value that meets these criteria in a or b, and there are no NaN or Inf values in either a or b.","description_html":"\u003cp\u003eGiven two numeric inputs a and b, return a row vector that contains the numbers found in only a or only b, but not both.  For example, the inputs:\u003c/p\u003e\u003cp\u003ea=[1 2 3 4 5];\u003c/p\u003e\u003cp\u003eb=[2 3 4 5 6];\u003c/p\u003e\u003cp\u003ewould return [1 6], as 2, 3, 4 and 5 are in both a and b, and can therefore be eliminated.  Please sort the returned vector in order from lowest to highest.\u003c/p\u003e\u003cp\u003eYou may assume that there is at least one value that meets these criteria in a or b, and there are no NaN or Inf values in either a or b.\u003c/p\u003e","function_template":"function y = vector_diff(a,b)\r\n  y = a+b;\r\nend","test_suite":"%%\r\na = [1 2 3 4 5];\r\nb = [2 3 4 5 6];\r\ny_correct = [1 6];\r\nassert(isequal(vector_diff(a,b),y_correct))\r\n%%\r\na = 10:-2:0;\r\nb = 1:2:11;\r\ny_correct = 0:11;\r\nassert(isequal(vector_diff(a,b),y_correct))\r\n%%\r\na=magic(5);\r\nb=magic(6);\r\ny_correct = 26:36;\r\nassert(isequal(vector_diff(a,b),y_correct))\r\n%%\r\na=(10:100)';\r\nb=11:100;\r\ny_correct = 10;\r\nassert(isequal(vector_diff(a,b),y_correct))\r\n%%\r\na=magic(3)-1.5;\r\nb=[];\r\ny_correct = -0.5:7.5;\r\nassert(isequal(vector_diff(a,b),y_correct))\r\n%%\r\na=zeros(5);\r\nb=ones(3);\r\ny_correct=[0 1];\r\nassert(isequal(vector_diff(a,b),y_correct))\r\n%%\r\nforbidden = '(regexp)';\r\nassert(isempty(regexp(evalc('type vector_diff'),forbidden)));","published":true,"deleted":false,"likes_count":6,"comments_count":3,"created_by":1615,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":808,"test_suite_updated_at":"2013-08-08T18:23:40.000Z","rescore_all_solutions":false,"group_id":12,"created_at":"2012-04-12T19:34:13.000Z","updated_at":"2026-02-10T12:58:46.000Z","published_at":"2012-04-12T19:55:41.000Z","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\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"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\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 two numeric inputs a and b, return a row vector that contains the numbers found in only a or only b, but not both. For example, the 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\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003ea=[1 2 3 4 5];\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\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\u003eb=[2 3 4 5 6];\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\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\u003ewould return [1 6], as 2, 3, 4 and 5 are in both a and b, and can therefore be eliminated. Please sort the returned vector in order from lowest to highest.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\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\u003eYou may assume that there is at least one value that meets these criteria in a or b, and there are no NaN or Inf values in either a or b.\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\"}]}"},{"id":795,"title":"Joining Ranges","description":"You are given a n-by-2 matrix. Each row represents a numeric range, e.g.\r\n\r\n  x = [0 5; 10 3; 20 15; 16 19; 25 25]\r\n  \r\ncontains ranges [0 5], [10 3], [20 15], [16 19], and [25 25]. Note that the first column does not always contain the smaller number. Join all overlapping ranges and return the sorted (both columns and all rows must be sorted) matrix of joined ranges\r\n\r\n  y = [0 10; 15 20; 25 25]\r\n\r\ni.e. ranges [0 5] and [10 3] are combined to [0 10], range [16 19] is completely overlapped by [15 20] and [25 25] is kept because it is a separate range.","description_html":"\u003cp\u003eYou are given a n-by-2 matrix. Each row represents a numeric range, e.g.\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003ex = [0 5; 10 3; 20 15; 16 19; 25 25]\r\n\u003c/pre\u003e\u003cp\u003econtains ranges [0 5], [10 3], [20 15], [16 19], and [25 25]. Note that the first column does not always contain the smaller number. Join all overlapping ranges and return the sorted (both columns and all rows must be sorted) matrix of joined ranges\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003ey = [0 10; 15 20; 25 25]\r\n\u003c/pre\u003e\u003cp\u003ei.e. ranges [0 5] and [10 3] are combined to [0 10], range [16 19] is completely overlapped by [15 20] and [25 25] is kept because it is a separate range.\u003c/p\u003e","function_template":"function y = joinRanges(x)\r\n  y = x;\r\nend","test_suite":"%%\r\nx = [0 5; 10 3; 20 15; 16 19; 25 25];\r\ny_correct = [0 10;15 20;25 25];\r\nassert(isequal(joinRanges(x),y_correct))\r\n\r\n%%\r\nx = [-10 -5; 0 -8; -1 5]; \r\ny_correct = [-10 5];\r\nassert(isequal(joinRanges(x),y_correct))\r\n\r\n%%\r\nx = [-50 0; 0 50; 100 50; -50 -100]; \r\ny_correct = [-100 100];\r\nassert(isequal(joinRanges(x),y_correct))\r\n\r\n\r\n%%\r\nx = [99 51; -49 -1; -51 -99; 1 49]; \r\ny_correct = [-99 -51;-49 -1;1 49;51 99];\r\nassert(isequal(joinRanges(x),y_correct))\r\n\r\n\r\n%%\r\nx = [-inf inf]; \r\ny_correct = x;\r\nassert(isequal(joinRanges(x),y_correct))\r\n\r\n%%\r\nx = [0 -42; -inf -10; inf 42]; \r\ny_correct = [-Inf 0;42 Inf];\r\nassert(isequal(joinRanges(x),y_correct))\r\n\r\n%%\r\nx = [36.154 63.178; 12.007 -5.156; -0.519 17.651]; \r\ny_correct = [-5.156 17.651;36.154 63.178];\r\nassert(isequal(joinRanges(x),y_correct))\r\n\r\n%%\r\nassert(isempty(strfind(evalc('type joinRanges'), 'regexp')));","published":true,"deleted":false,"likes_count":9,"comments_count":3,"created_by":4976,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":399,"test_suite_updated_at":"2013-10-20T11:57:08.000Z","rescore_all_solutions":false,"group_id":12,"created_at":"2012-06-27T16:04:34.000Z","updated_at":"2026-02-17T06:56:17.000Z","published_at":"2012-06-27T16:10:37.000Z","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 are given a n-by-2 matrix. Each row represents a numeric range, e.g.\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 = [0 5; 10 3; 20 15; 16 19; 25 25]]]\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\u003econtains ranges [0 5], [10 3], [20 15], [16 19], and [25 25]. Note that the first column does not always contain the smaller number. Join all overlapping ranges and return the sorted (both columns and all rows must be sorted) matrix of joined ranges\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[y = [0 10; 15 20; 25 25]]]\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\u003ei.e. ranges [0 5] and [10 3] are combined to [0 10], range [16 19] is completely overlapped by [15 20] and [25 25] is kept because it is a separate range.\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":576,"title":"Return elements unique to either input","description":"Given two numeric inputs a and b, return a row vector that contains the numbers found in only a or only b, but not both.  For example, the inputs:\r\n\r\na=[1 2 3 4 5];\r\n\r\nb=[2 3 4 5 6];\r\n\r\nwould return [1 6], as 2, 3, 4 and 5 are in both a and b, and can therefore be eliminated.  Please sort the returned vector in order from lowest to highest.\r\n\r\nYou may assume that there is at least one value that meets these criteria in a or b, and there are no NaN or Inf values in either a or b.","description_html":"\u003cp\u003eGiven two numeric inputs a and b, return a row vector that contains the numbers found in only a or only b, but not both.  For example, the inputs:\u003c/p\u003e\u003cp\u003ea=[1 2 3 4 5];\u003c/p\u003e\u003cp\u003eb=[2 3 4 5 6];\u003c/p\u003e\u003cp\u003ewould return [1 6], as 2, 3, 4 and 5 are in both a and b, and can therefore be eliminated.  Please sort the returned vector in order from lowest to highest.\u003c/p\u003e\u003cp\u003eYou may assume that there is at least one value that meets these criteria in a or b, and there are no NaN or Inf values in either a or b.\u003c/p\u003e","function_template":"function y = vector_diff(a,b)\r\n  y = a+b;\r\nend","test_suite":"%%\r\na = [1 2 3 4 5];\r\nb = [2 3 4 5 6];\r\ny_correct = [1 6];\r\nassert(isequal(vector_diff(a,b),y_correct))\r\n%%\r\na = 10:-2:0;\r\nb = 1:2:11;\r\ny_correct = 0:11;\r\nassert(isequal(vector_diff(a,b),y_correct))\r\n%%\r\na=magic(5);\r\nb=magic(6);\r\ny_correct = 26:36;\r\nassert(isequal(vector_diff(a,b),y_correct))\r\n%%\r\na=(10:100)';\r\nb=11:100;\r\ny_correct = 10;\r\nassert(isequal(vector_diff(a,b),y_correct))\r\n%%\r\na=magic(3)-1.5;\r\nb=[];\r\ny_correct = -0.5:7.5;\r\nassert(isequal(vector_diff(a,b),y_correct))\r\n%%\r\na=zeros(5);\r\nb=ones(3);\r\ny_correct=[0 1];\r\nassert(isequal(vector_diff(a,b),y_correct))\r\n%%\r\nforbidden = '(regexp)';\r\nassert(isempty(regexp(evalc('type vector_diff'),forbidden)));","published":true,"deleted":false,"likes_count":6,"comments_count":3,"created_by":1615,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":808,"test_suite_updated_at":"2013-08-08T18:23:40.000Z","rescore_all_solutions":false,"group_id":12,"created_at":"2012-04-12T19:34:13.000Z","updated_at":"2026-02-10T12:58:46.000Z","published_at":"2012-04-12T19:55:41.000Z","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\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"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\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 two numeric inputs a and b, return a row vector that contains the numbers found in only a or only b, but not both. For example, the 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\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003ea=[1 2 3 4 5];\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\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\u003eb=[2 3 4 5 6];\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\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\u003ewould return [1 6], as 2, 3, 4 and 5 are in both a and b, and can therefore be eliminated. Please sort the returned vector in order from lowest to highest.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\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\u003eYou may assume that there is at least one value that meets these criteria in a or b, and there are no NaN or Inf values in either a or b.\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\"}]}"},{"id":795,"title":"Joining Ranges","description":"You are given a n-by-2 matrix. Each row represents a numeric range, e.g.\r\n\r\n  x = [0 5; 10 3; 20 15; 16 19; 25 25]\r\n  \r\ncontains ranges [0 5], [10 3], [20 15], [16 19], and [25 25]. Note that the first column does not always contain the smaller number. Join all overlapping ranges and return the sorted (both columns and all rows must be sorted) matrix of joined ranges\r\n\r\n  y = [0 10; 15 20; 25 25]\r\n\r\ni.e. ranges [0 5] and [10 3] are combined to [0 10], range [16 19] is completely overlapped by [15 20] and [25 25] is kept because it is a separate range.","description_html":"\u003cp\u003eYou are given a n-by-2 matrix. Each row represents a numeric range, e.g.\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003ex = [0 5; 10 3; 20 15; 16 19; 25 25]\r\n\u003c/pre\u003e\u003cp\u003econtains ranges [0 5], [10 3], [20 15], [16 19], and [25 25]. Note that the first column does not always contain the smaller number. Join all overlapping ranges and return the sorted (both columns and all rows must be sorted) matrix of joined ranges\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003ey = [0 10; 15 20; 25 25]\r\n\u003c/pre\u003e\u003cp\u003ei.e. ranges [0 5] and [10 3] are combined to [0 10], range [16 19] is completely overlapped by [15 20] and [25 25] is kept because it is a separate range.\u003c/p\u003e","function_template":"function y = joinRanges(x)\r\n  y = x;\r\nend","test_suite":"%%\r\nx = [0 5; 10 3; 20 15; 16 19; 25 25];\r\ny_correct = [0 10;15 20;25 25];\r\nassert(isequal(joinRanges(x),y_correct))\r\n\r\n%%\r\nx = [-10 -5; 0 -8; -1 5]; \r\ny_correct = [-10 5];\r\nassert(isequal(joinRanges(x),y_correct))\r\n\r\n%%\r\nx = [-50 0; 0 50; 100 50; -50 -100]; \r\ny_correct = [-100 100];\r\nassert(isequal(joinRanges(x),y_correct))\r\n\r\n\r\n%%\r\nx = [99 51; -49 -1; -51 -99; 1 49]; \r\ny_correct = [-99 -51;-49 -1;1 49;51 99];\r\nassert(isequal(joinRanges(x),y_correct))\r\n\r\n\r\n%%\r\nx = [-inf inf]; \r\ny_correct = x;\r\nassert(isequal(joinRanges(x),y_correct))\r\n\r\n%%\r\nx = [0 -42; -inf -10; inf 42]; \r\ny_correct = [-Inf 0;42 Inf];\r\nassert(isequal(joinRanges(x),y_correct))\r\n\r\n%%\r\nx = [36.154 63.178; 12.007 -5.156; -0.519 17.651]; \r\ny_correct = [-5.156 17.651;36.154 63.178];\r\nassert(isequal(joinRanges(x),y_correct))\r\n\r\n%%\r\nassert(isempty(strfind(evalc('type joinRanges'), 'regexp')));","published":true,"deleted":false,"likes_count":9,"comments_count":3,"created_by":4976,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":399,"test_suite_updated_at":"2013-10-20T11:57:08.000Z","rescore_all_solutions":false,"group_id":12,"created_at":"2012-06-27T16:04:34.000Z","updated_at":"2026-02-17T06:56:17.000Z","published_at":"2012-06-27T16:10:37.000Z","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 are given a n-by-2 matrix. Each row represents a numeric range, e.g.\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 = [0 5; 10 3; 20 15; 16 19; 25 25]]]\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\u003econtains ranges [0 5], [10 3], [20 15], [16 19], and [25 25]. Note that the first column does not always contain the smaller number. Join all overlapping ranges and return the sorted (both columns and all rows must be sorted) matrix of joined ranges\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[y = [0 10; 15 20; 25 25]]]\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\u003ei.e. ranges [0 5] and [10 3] are combined to [0 10], range [16 19] is completely overlapped by [15 20] and [25 25] is kept because it is a separate range.\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\\\" 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