{"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":1196,"title":"Apply a function array to an array of numbers ","description":"It is required to apply a cell array of functions to a numerical array, where the functions accept only scalar inputs.\r\n\r\nExample:\r\n\r\n\u003e\u003e f{1} = @(x) x;\r\n\r\n\u003e\u003e f{2} = @(x) x^2;\r\n\r\n\u003e\u003e f{3} = @(x) x^3;\r\n\r\n\u003e\u003e x = 1:5;\r\n\r\n\u003e\u003e arfn(f,x)\r\n\r\nans =\r\n\r\n     1     2     3     4     5\r\n     1     4     9    16    25\r\n     1     8    27    64   125","description_html":"\u003cp\u003eIt is required to apply a cell array of functions to a numerical array, where the functions accept only scalar inputs.\u003c/p\u003e\u003cp\u003eExample:\u003c/p\u003e\u003cp\u003e\u003e\u003e f{1} = @(x) x;\u003c/p\u003e\u003cp\u003e\u003e\u003e f{2} = @(x) x^2;\u003c/p\u003e\u003cp\u003e\u003e\u003e f{3} = @(x) x^3;\u003c/p\u003e\u003cp\u003e\u003e\u003e x = 1:5;\u003c/p\u003e\u003cp\u003e\u003e\u003e arfn(f,x)\u003c/p\u003e\u003cp\u003eans =\u003c/p\u003e\u003cpre\u003e     1     2     3     4     5\r\n     1     4     9    16    25\r\n     1     8    27    64   125\u003c/pre\u003e","function_template":"function y = arfn(f,x)\r\n  y = x;\r\nend","test_suite":"%%\r\nf{1} = @(x) x;\r\nf{2} = @(x) x^2;\r\nf{3} = @(x) x^3;\r\nx = 1:5;\r\ny_correct = [     1     2     3     4     5\r\n                  1     4     9    16    25\r\n                  1     8    27    64   125];\r\nassert(isequal(arfn(f,x),y_correct))\r\n\r\n%%\r\nf{1} = @(x) 1/x;\r\nf{2} = @(x) x^0.5;\r\nf{3} = @(x) x-4;\r\nx = [4 16 25 100];\r\ny_correct = [0.25    0.0625    0.04    0.01\r\n             2       4         5       10\r\n             0       12        21      96];\r\nassert(isequal(arfn(f,x),y_correct))\r\n","published":true,"deleted":false,"likes_count":2,"comments_count":0,"created_by":3399,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":103,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2013-01-11T11:58:13.000Z","updated_at":"2026-05-15T16:51:05.000Z","published_at":"2013-01-11T12:08:22.000Z","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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x^2;\r\n\r\n\u003e\u003e f{3} = @(x) x^3;\r\n\r\n\u003e\u003e x = 1:5;\r\n\r\n\u003e\u003e arfn(f,x)\r\n\r\nans =\r\n\r\n     1     2     3     4     5\r\n     1     4     9    16    25\r\n     1     8    27    64   125","description_html":"\u003cp\u003eIt is required to apply a cell array of functions to a numerical array, where the functions accept only scalar inputs.\u003c/p\u003e\u003cp\u003eExample:\u003c/p\u003e\u003cp\u003e\u003e\u003e f{1} = @(x) x;\u003c/p\u003e\u003cp\u003e\u003e\u003e f{2} = @(x) x^2;\u003c/p\u003e\u003cp\u003e\u003e\u003e f{3} = @(x) x^3;\u003c/p\u003e\u003cp\u003e\u003e\u003e x = 1:5;\u003c/p\u003e\u003cp\u003e\u003e\u003e arfn(f,x)\u003c/p\u003e\u003cp\u003eans =\u003c/p\u003e\u003cpre\u003e     1     2     3     4     5\r\n     1     4     9    16    25\r\n     1     8    27    64   125\u003c/pre\u003e","function_template":"function y = arfn(f,x)\r\n  y = x;\r\nend","test_suite":"%%\r\nf{1} = @(x) x;\r\nf{2} = @(x) x^2;\r\nf{3} = @(x) x^3;\r\nx = 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96];\r\nassert(isequal(arfn(f,x),y_correct))\r\n","published":true,"deleted":false,"likes_count":2,"comments_count":0,"created_by":3399,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":103,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2013-01-11T11:58:13.000Z","updated_at":"2026-05-15T16:51:05.000Z","published_at":"2013-01-11T12:08:22.000Z","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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x^2;\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\u003e\u0026gt;\u0026gt; f{3} = @(x) x^3;\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\u003e\u0026gt;\u0026gt; x = 1:5;\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u0026gt;\u0026gt; arfn(f,x)\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\u003eans =\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[     1     2     3     4     5\\n     1     4   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