{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2026-06-05T00:10:21.000Z","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":"2026-06-05T00:00:00.000Z","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":802,"title":"Create a matrix from a cell","description":"In this problem , you must convert a cell into a matrix and pad each cell with NaN. \r\n\r\n\r\n*Example 1:* \r\n\r\nIf you have the input cell:\r\n\r\n  C = {[1 2 3],[]}\r\n\r\nthe output must be the matrix :\r\n\r\n    output = [  1     2     3\r\n               NaN   NaN   NaN]\r\n\r\n\r\n\r\n\r\n*Example 2:* \r\n\r\n  C = {[1 2 3],8,[],[15  3]}\r\n\r\nthe output must be the matrix :\r\n  \r\n       1     2     3\r\n       8   NaN   NaN\r\n     NaN   NaN   NaN\r\n      15     3   NaN\r\n\r\n\r\n\r\n\r\n\r\n","description_html":"\u003cp\u003eIn this problem , you must convert a cell into a matrix and pad each cell with NaN.\u003c/p\u003e\u003cp\u003e\u003cb\u003eExample 1:\u003c/b\u003e\u003c/p\u003e\u003cp\u003eIf you have the input cell:\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003eC = {[1 2 3],[]}\r\n\u003c/pre\u003e\u003cp\u003ethe output must be the matrix :\u003c/p\u003e\u003cpre\u003e    output = [  1     2     3\r\n               NaN   NaN   NaN]\u003c/pre\u003e\u003cp\u003e\u003cb\u003eExample 2:\u003c/b\u003e\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003eC = {[1 2 3],8,[],[15  3]}\r\n\u003c/pre\u003e\u003cp\u003ethe output must be the matrix :\u003c/p\u003e\u003cpre\u003e       1     2     3\r\n       8   NaN   NaN\r\n     NaN   NaN   NaN\r\n      15     3   NaN\u003c/pre\u003e","function_template":"function output= your_fcn_name(C)\r\n  output = C;\r\nend","test_suite":"%% example 1\r\nC = {[1 2 3],[]};\r\n output = [  1     2     3\r\n               NaN   NaN   NaN];\r\nassert(isequalwithequalnans(your_fcn_name(C),output))\r\n\r\n%% example 2\r\nC = {[1 2 3],8,[],[15  3]};\r\ny_correct = [ 1     2     3\r\n     8   NaN   NaN\r\n   NaN   NaN   NaN\r\n    15     3   NaN];\r\n\r\nassert(isequalwithequalnans(your_fcn_name(C),y_correct))\r\n\r\n\r\n%%\r\ntcell = {ones(1,4), [1 2 3 4 5], 1:8, 1, [],0};\r\ny_correct = [   1     1     1     1   NaN   NaN   NaN   NaN\r\n     1     2     3     4     5   NaN   NaN   NaN\r\n     1     2     3     4     5     6     7     8\r\n     1   NaN   NaN   NaN   NaN   NaN   NaN   NaN\r\n   NaN   NaN   NaN   NaN   NaN   NaN   NaN   NaN\r\n     0   NaN   NaN   NaN   NaN   NaN   NaN   NaN];\r\nassert(isequalwithequalnans(your_fcn_name(tcell),y_correct))\r\n\r\n%%\r\nC = {[]}\r\nassert(isempty(your_fcn_name(C)))","published":true,"deleted":false,"likes_count":2,"comments_count":0,"created_by":639,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":75,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2012-06-28T10:25:57.000Z","updated_at":"2026-03-06T12:32:57.000Z","published_at":"2012-06-28T10:25:57.000Z","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\u003eIn this problem , you must convert a cell into a matrix and pad each cell with NaN.\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\u003eExample 1:\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\u003eIf you have the input cell:\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[C = {[1 2 3],[]}]]\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\u003ethe output must be the matrix :\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[    output = [  1     2     3\\n               NaN   NaN   NaN]]]\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:rPr\u003e\u003cw:b/\u003e\u003c/w:rPr\u003e\u003cw:t\u003eExample 2:\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[C = {[1 2 3],8,[],[15  3]}]]\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\u003ethe output must be the matrix :\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\\n       8   NaN   NaN\\n     NaN   NaN   NaN\\n      15     3   NaN]]\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":{"problems":[{"id":802,"title":"Create a matrix from a cell","description":"In this problem , you must convert a cell into a matrix and pad each cell with NaN. \r\n\r\n\r\n*Example 1:* \r\n\r\nIf you have the input cell:\r\n\r\n  C = {[1 2 3],[]}\r\n\r\nthe output must be the matrix :\r\n\r\n    output = [  1     2     3\r\n               NaN   NaN   NaN]\r\n\r\n\r\n\r\n\r\n*Example 2:* \r\n\r\n  C = {[1 2 3],8,[],[15  3]}\r\n\r\nthe output must be the matrix :\r\n  \r\n       1     2     3\r\n       8   NaN   NaN\r\n     NaN   NaN   NaN\r\n      15     3   NaN\r\n\r\n\r\n\r\n\r\n\r\n","description_html":"\u003cp\u003eIn this problem , you must convert a cell into a matrix and pad each cell with NaN.\u003c/p\u003e\u003cp\u003e\u003cb\u003eExample 1:\u003c/b\u003e\u003c/p\u003e\u003cp\u003eIf you have the input cell:\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003eC = {[1 2 3],[]}\r\n\u003c/pre\u003e\u003cp\u003ethe output must be the matrix :\u003c/p\u003e\u003cpre\u003e    output = [  1     2     3\r\n               NaN   NaN   NaN]\u003c/pre\u003e\u003cp\u003e\u003cb\u003eExample 2:\u003c/b\u003e\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003eC = {[1 2 3],8,[],[15  3]}\r\n\u003c/pre\u003e\u003cp\u003ethe output must be the matrix :\u003c/p\u003e\u003cpre\u003e       1     2     3\r\n       8   NaN   NaN\r\n     NaN   NaN   NaN\r\n      15     3   NaN\u003c/pre\u003e","function_template":"function output= your_fcn_name(C)\r\n  output = C;\r\nend","test_suite":"%% example 1\r\nC = {[1 2 3],[]};\r\n output = [  1     2     3\r\n               NaN   NaN   NaN];\r\nassert(isequalwithequalnans(your_fcn_name(C),output))\r\n\r\n%% example 2\r\nC = {[1 2 3],8,[],[15  3]};\r\ny_correct = [ 1     2     3\r\n     8   NaN   NaN\r\n   NaN   NaN   NaN\r\n    15     3   NaN];\r\n\r\nassert(isequalwithequalnans(your_fcn_name(C),y_correct))\r\n\r\n\r\n%%\r\ntcell = {ones(1,4), [1 2 3 4 5], 1:8, 1, [],0};\r\ny_correct = [   1     1     1     1   NaN   NaN   NaN   NaN\r\n     1     2     3     4     5   NaN   NaN   NaN\r\n     1     2     3     4     5     6     7     8\r\n     1   NaN   NaN   NaN   NaN   NaN   NaN   NaN\r\n   NaN   NaN   NaN   NaN   NaN   NaN   NaN   NaN\r\n     0   NaN   NaN   NaN   NaN   NaN   NaN   NaN];\r\nassert(isequalwithequalnans(your_fcn_name(tcell),y_correct))\r\n\r\n%%\r\nC = {[]}\r\nassert(isempty(your_fcn_name(C)))","published":true,"deleted":false,"likes_count":2,"comments_count":0,"created_by":639,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":75,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2012-06-28T10:25:57.000Z","updated_at":"2026-03-06T12:32:57.000Z","published_at":"2012-06-28T10:25:57.000Z","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\u003eIn this problem , you must convert a cell into a matrix and pad each cell with NaN.\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\u003eExample 1:\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\u003eIf you have the input cell:\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[C = {[1 2 3],[]}]]\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\u003ethe output must be the matrix :\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[    output = [  1     2     3\\n               NaN   NaN   NaN]]]\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:rPr\u003e\u003cw:b/\u003e\u003c/w:rPr\u003e\u003cw:t\u003eExample 2:\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[C = {[1 2 3],8,[],[15  3]}]]\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\u003ethe output must be the matrix :\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\\n       8   NaN   NaN\\n     NaN   NaN   NaN\\n      15     3   NaN]]\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\"}]}"}],"errors":[],"facets":[[],[{"value":"easy","count":1,"selected":false}]],"term":"tag:\"pad\"","page":1,"per_page":50,"sort":"map(difficulty_value,0,0,999) asc"}}