{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2026-05-26T00:16:20.000Z","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":"2026-05-26T00:00:00.000Z","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":44243,"title":"Ternary Conditional Operator","description":"Returns one of two expressions depending on a condition.\r\n\r\n  (test) : (expression1) : (expression2)\r\n\r\n*test:* \r\nAny Boolean expression.\r\n\r\n*expression1:* \r\nA function handle called if test is true. \r\n\r\n*expression2:* \r\nA function handle called if test is false. \r\n\r\n*Example*\r\n\r\n  \u003e\u003e a = (2 \u003e 1) : (@() 1) : (@() 2)\r\n     a =\r\n          1\r\n  \u003e\u003e a = (1 \u003e 2) : (@() 1) : (@() 2)\r\n     a =\r\n          2\r\n\r\nThe |colon.m| you submitted will be moved to the class folder |@function_handle|:\r\n  \r\n  mkdir @function_handle\r\n  movefile submission/colon.m @function_handle","description_html":"\u003cp\u003eReturns one of two expressions depending on a condition.\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003e(test) : (expression1) : (expression2)\r\n\u003c/pre\u003e\u003cp\u003e\u003cb\u003etest:\u003c/b\u003e \r\nAny Boolean expression.\u003c/p\u003e\u003cp\u003e\u003cb\u003eexpression1:\u003c/b\u003e \r\nA function handle called if test is true.\u003c/p\u003e\u003cp\u003e\u003cb\u003eexpression2:\u003c/b\u003e \r\nA function handle called if test is false.\u003c/p\u003e\u003cp\u003e\u003cb\u003eExample\u003c/b\u003e\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003e\u0026gt;\u0026gt; a = (2 \u0026gt; 1) : (@() 1) : (@() 2)\r\n   a =\r\n        1\r\n\u0026gt;\u0026gt; a = (1 \u0026gt; 2) : (@() 1) : (@() 2)\r\n   a =\r\n        2\r\n\u003c/pre\u003e\u003cp\u003eThe \u003ctt\u003ecolon.m\u003c/tt\u003e you submitted will be moved to the class folder \u003ctt\u003e@function_handle\u003c/tt\u003e:\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003emkdir @function_handle\r\nmovefile submission/colon.m @function_handle\r\n\u003c/pre\u003e","function_template":"function y = colon1(test, expr1, expr2)\r\n  y = expr1;\r\nend","test_suite":"%%\r\nmkdir @function_handle\r\nmovefile colon1.m @function_handle/colon.m\r\n\r\n%%\r\nassert(isequal((2 \u003e 1) : (@() 1) : (@() 2), 1))\r\n\r\n%%\r\nassert(isequal((1 \u003e 2) : (@() 1) : (@() 2), 2))\r\n\r\n%%\r\nfib = @(f, n) (n \u003e 2) : (@() f(f, n - 1) + f(f, n - 2)) : (@() 1);\r\nassert(fib(fib, 20) == 6765)\r\n\r\n%%\r\nx = magic(3);\r\n[m,I] = (x(1) \u003e 0) : (@() max(x)) : (@() min(x)) \r\nassert(isequal(m, [8 9 7]) \u0026\u0026 isequal(I, [1 3 2]))\r\n","published":true,"deleted":false,"likes_count":6,"comments_count":5,"created_by":1434,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":13,"test_suite_updated_at":"2020-04-22T14:42:35.000Z","rescore_all_solutions":false,"group_id":52,"created_at":"2017-06-27T15:11:40.000Z","updated_at":"2026-05-29T03:45:36.000Z","published_at":"2017-06-27T15:11:40.000Z","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 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class=\"language-matlab\"\u003ex = [rectangle, line];\r\n\u003c/pre\u003e\u003cp\u003eso\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003ey == true\r\n\u003c/pre\u003e","function_template":"function y = isheterogeneous(x)\r\n  y = x;\r\nend","test_suite":"%%\r\nx = [figure; axes; rectangle];\r\ny_correct = true;\r\nassert(isequal(isheterogeneous(x),y_correct))\r\n\r\n%%\r\nx = [matlab.net.http.io.FileProvider, matlab.net.http.io.JSONProvider];\r\ny_correct = true;\r\nassert(isequal(isheterogeneous(x),y_correct))\r\n\r\n%%\r\nx = \"\";\r\ny_correct = false;\r\nassert(isequal(isheterogeneous(x),y_correct))\r\n\r\n%% \r\nx = rand(5, 4);\r\ny_correct = false;\r\nassert(isequal(isheterogeneous(x),y_correct))\r\n\r\n%% \r\nx = {table(), 123, digraph()};\r\ny_correct = false;\r\nassert(isequal(isheterogeneous(x),y_correct))\r\n\r\n%%\r\nx = [figure; figure];\r\ny_correct = false;\r\nassert(isequal(isheterogeneous(x),y_correct))\r\n\r\n%%\r\nx = [];\r\ny_correct = false;\r\nassert(isequal(isheterogeneous(x),y_correct))\r\n","published":true,"deleted":false,"likes_count":0,"comments_count":0,"created_by":327375,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":7,"test_suite_updated_at":"2020-05-22T17:00:18.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2020-05-22T16:58:54.000Z","updated_at":"2026-05-30T14:19:44.000Z","published_at":"2020-05-22T16:58:54.000Z","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\u003eClasses inherent from matlab.mixin.Heterogeneous can form arrays of heterogeneous elements, that is elements of different subclasses of the same superclass. Implement a function to determine if incoming vector is heterogeneous, i.e. a mix of more than one classes, or not.\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\u003ee.g. the following code create a heterogeneous array of objects.\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 = [rectangle, line];]]\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\u003eso\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 == 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false. \r\n\r\n*Example*\r\n\r\n  \u003e\u003e a = (2 \u003e 1) : (@() 1) : (@() 2)\r\n     a =\r\n          1\r\n  \u003e\u003e a = (1 \u003e 2) : (@() 1) : (@() 2)\r\n     a =\r\n          2\r\n\r\nThe |colon.m| you submitted will be moved to the class folder |@function_handle|:\r\n  \r\n  mkdir @function_handle\r\n  movefile submission/colon.m @function_handle","description_html":"\u003cp\u003eReturns one of two expressions depending on a condition.\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003e(test) : (expression1) : (expression2)\r\n\u003c/pre\u003e\u003cp\u003e\u003cb\u003etest:\u003c/b\u003e \r\nAny Boolean expression.\u003c/p\u003e\u003cp\u003e\u003cb\u003eexpression1:\u003c/b\u003e \r\nA function handle called if test is true.\u003c/p\u003e\u003cp\u003e\u003cb\u003eexpression2:\u003c/b\u003e \r\nA function handle called if test is false.\u003c/p\u003e\u003cp\u003e\u003cb\u003eExample\u003c/b\u003e\u003c/p\u003e\u003cpre 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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\u003eClasses inherent from matlab.mixin.Heterogeneous can form arrays of heterogeneous elements, that is elements of different subclasses of the same superclass. 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