{"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":2281,"title":"Array ex-OR","description":"There are in MATLAB logical functions such as \r\n_\u003chttp://www.mathworks.co.uk/help/matlab/ref/and.html and\u003e,_ \r\n_\u003chttp://www.mathworks.co.uk/help/matlab/ref/or.html or\u003e_, \r\n_\u003chttp://www.mathworks.co.uk/help/matlab/ref/xor.html xor\u003e_.\r\n\r\n_And_ has its matrix equivalent \r\n_\u003chttp://www.mathworks.co.uk/help/matlab/ref/all.html all\u003e_, \r\nand so has _or_ its \r\n_\u003chttp://www.mathworks.co.uk/help/matlab/ref/any.html any\u003e_.\r\n\r\nWrite a function which is array equivalent for exclusive-OR function _xor_.\r\n\r\nNote that your solution will be scored using its Cody size and complexity.\r\n","description_html":"\u003cp\u003eThere are in MATLAB logical functions such as  \u003ci\u003e\u003ca href = \"http://www.mathworks.co.uk/help/matlab/ref/and.html\"\u003eand\u003c/a\u003e,\u003c/i\u003e  \u003ci\u003e\u003ca href = \"http://www.mathworks.co.uk/help/matlab/ref/or.html\"\u003eor\u003c/a\u003e\u003c/i\u003e,  \u003ci\u003e\u003ca href = \"http://www.mathworks.co.uk/help/matlab/ref/xor.html\"\u003exor\u003c/a\u003e\u003c/i\u003e.\u003c/p\u003e\u003cp\u003e\u003ci\u003eAnd\u003c/i\u003e has its matrix equivalent  \u003ci\u003e\u003ca href = \"http://www.mathworks.co.uk/help/matlab/ref/all.html\"\u003eall\u003c/a\u003e\u003c/i\u003e, \r\nand so has \u003ci\u003eor\u003c/i\u003e its  \u003ci\u003e\u003ca href = \"http://www.mathworks.co.uk/help/matlab/ref/any.html\"\u003eany\u003c/a\u003e\u003c/i\u003e.\u003c/p\u003e\u003cp\u003eWrite a function which is array equivalent for exclusive-OR function \u003ci\u003exor\u003c/i\u003e.\u003c/p\u003e\u003cp\u003eNote that your solution will be scored using its Cody size and complexity.\u003c/p\u003e","function_template":"function out = arr_xor(in) % (in,dim) ?\r\n\r\n  out = xor(in,dim);\r\n\r\nend","test_suite":"%%\r\nx = [0 0 0 0 0 0 1 1 1 1 1 1;\r\n     0 0 0 1 1 1 0 0 0 1 1 1;\r\n     0 1 1 0 1 1 0 1 1 0 1 1;\r\n     0 1 0 1 0 1 0 1 0 1 0 1];\r\ny = [0 0 1 0 0 1 1 1 0 1 1 0];\r\nassert(isequal(arr_xor(x),y))\r\nassert(isequal(arr_xor(x'),zeros(1,4)))\r\n%%\r\nx = randi([0 1],4,12);\r\ny = x(1,:);\r\nfor k=2:4\r\n  y = xor(y,x(k,:));\r\nend\r\nassert(isequal(arr_xor(x),y))\r\n%% optional:\r\n% optional logical output\r\ntry\r\n  assert(islogical(arr_xor(randi([0 1],6,10))))\r\n  penalty = 0;\r\ncatch\r\n  disp('output is not logical, +15 points of penalty')\r\n  penalty = 15;\r\nend\r\n% optional - dim\r\nx = randi([0 1],10);\r\ntry\r\n  assert(isequal(arr_xor(x),arr_xor(x ,1)))\r\n  assert(isequal(arr_xor(x),arr_xor(x',2)'))\r\ncatch\r\n  disp('operating dimention not implemented. +15 points of penalty')\r\n  penalty = penalty+15;\r\nend\r\n% optional - correct for singular dimention\r\ntry\r\n  assert(isequal(arr_xor(1),1))\r\n  assert(isequal(arr_xor([0 0 1 1 0]),0))\r\n  assert(isequal(arr_xor([0;1;1;1;0]),1))\r\ncatch\r\n  disp('incorrect work for vectors, +10 points of penalty');\r\n  penalty=penalty+10;\r\nend\r\n% format conversion\r\ntry\r\n  assert(isequal(arr_xor(['MATLAB';'matlab']'),[0 0]))\r\ncatch\r\n  disp('no conversion from char, +2 points of penalty' )\r\n  penalty=penalty+2;\r\nend\r\ntry\r\n  assert(all(arr_xor(randi(5,5))))\r\n  assert(~any(arr_xor(randi(6,6))))\r\ncatch\r\n  disp('no conversion from double, +5 points of penalty' )\r\n  penalty=penalty+5;\r\nend\r\nfor l=1:4\r\n  stime(l)=tic;\r\n  for k=2:750\r\n    [~]=arr_xor(randi([0 1],k));\r\n  end\r\n  time(l)=toc(stime(l));\r\nend\r\ntime=min(time);\r\ndisp(['elapsed time is ' num2str(time*1000) ' ms.'])\r\n%score calculation\r\nt = mtree('arr_xor.m','-file');\r\nsize = length(t.nodesize);\r\nfeval(@assignin,'caller','score',size + penalty + round(time*5));\r\n","published":true,"deleted":false,"likes_count":3,"comments_count":0,"created_by":14358,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":57,"test_suite_updated_at":"2014-04-11T20:10:24.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2014-04-11T19:50:53.000Z","updated_at":"2026-04-03T02:47:52.000Z","published_at":"2014-04-11T20:00:15.000Z","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\u003eThere are in MATLAB logical functions such as \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"http://www.mathworks.co.uk/help/matlab/ref/and.html\\\"\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003eand\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003e,\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"http://www.mathworks.co.uk/help/matlab/ref/or.html\\\"\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003eor\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e, \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"http://www.mathworks.co.uk/help/matlab/ref/xor.html\\\"\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003exor\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\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:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003eAnd\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e has its matrix equivalent \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"http://www.mathworks.co.uk/help/matlab/ref/all.html\\\"\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003eall\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e, and so has\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003eor\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e its \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"http://www.mathworks.co.uk/help/matlab/ref/any.html\\\"\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003eany\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\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\u003eWrite a function which is array equivalent for exclusive-OR function\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:i/\u003e\u003c/w:rPr\u003e\u003cw:t\u003exor\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\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\u003eNote that your solution will be scored using its Cody size and complexity.\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":2281,"title":"Array ex-OR","description":"There are in MATLAB logical functions such as \r\n_\u003chttp://www.mathworks.co.uk/help/matlab/ref/and.html and\u003e,_ \r\n_\u003chttp://www.mathworks.co.uk/help/matlab/ref/or.html or\u003e_, \r\n_\u003chttp://www.mathworks.co.uk/help/matlab/ref/xor.html xor\u003e_.\r\n\r\n_And_ has its matrix equivalent \r\n_\u003chttp://www.mathworks.co.uk/help/matlab/ref/all.html all\u003e_, \r\nand so has _or_ its \r\n_\u003chttp://www.mathworks.co.uk/help/matlab/ref/any.html any\u003e_.\r\n\r\nWrite a function which is array equivalent for exclusive-OR function _xor_.\r\n\r\nNote that your solution will be scored using its Cody size and complexity.\r\n","description_html":"\u003cp\u003eThere are in MATLAB logical functions such as  \u003ci\u003e\u003ca href = \"http://www.mathworks.co.uk/help/matlab/ref/and.html\"\u003eand\u003c/a\u003e,\u003c/i\u003e  \u003ci\u003e\u003ca href = \"http://www.mathworks.co.uk/help/matlab/ref/or.html\"\u003eor\u003c/a\u003e\u003c/i\u003e,  \u003ci\u003e\u003ca href = \"http://www.mathworks.co.uk/help/matlab/ref/xor.html\"\u003exor\u003c/a\u003e\u003c/i\u003e.\u003c/p\u003e\u003cp\u003e\u003ci\u003eAnd\u003c/i\u003e has its matrix equivalent  \u003ci\u003e\u003ca href = \"http://www.mathworks.co.uk/help/matlab/ref/all.html\"\u003eall\u003c/a\u003e\u003c/i\u003e, \r\nand so has \u003ci\u003eor\u003c/i\u003e its  \u003ci\u003e\u003ca href = \"http://www.mathworks.co.uk/help/matlab/ref/any.html\"\u003eany\u003c/a\u003e\u003c/i\u003e.\u003c/p\u003e\u003cp\u003eWrite a function which is array equivalent for exclusive-OR function \u003ci\u003exor\u003c/i\u003e.\u003c/p\u003e\u003cp\u003eNote that your solution will be scored using its Cody size and complexity.\u003c/p\u003e","function_template":"function out = arr_xor(in) % (in,dim) ?\r\n\r\n  out = xor(in,dim);\r\n\r\nend","test_suite":"%%\r\nx = [0 0 0 0 0 0 1 1 1 1 1 1;\r\n     0 0 0 1 1 1 0 0 0 1 1 1;\r\n     0 1 1 0 1 1 0 1 1 0 1 1;\r\n     0 1 0 1 0 1 0 1 0 1 0 1];\r\ny = [0 0 1 0 0 1 1 1 0 1 1 0];\r\nassert(isequal(arr_xor(x),y))\r\nassert(isequal(arr_xor(x'),zeros(1,4)))\r\n%%\r\nx = randi([0 1],4,12);\r\ny = x(1,:);\r\nfor k=2:4\r\n  y = xor(y,x(k,:));\r\nend\r\nassert(isequal(arr_xor(x),y))\r\n%% optional:\r\n% optional logical output\r\ntry\r\n  assert(islogical(arr_xor(randi([0 1],6,10))))\r\n  penalty = 0;\r\ncatch\r\n  disp('output is not logical, +15 points of penalty')\r\n  penalty = 15;\r\nend\r\n% optional - dim\r\nx = randi([0 1],10);\r\ntry\r\n  assert(isequal(arr_xor(x),arr_xor(x ,1)))\r\n  assert(isequal(arr_xor(x),arr_xor(x',2)'))\r\ncatch\r\n  disp('operating dimention not implemented. +15 points of penalty')\r\n  penalty = penalty+15;\r\nend\r\n% optional - correct for singular dimention\r\ntry\r\n  assert(isequal(arr_xor(1),1))\r\n  assert(isequal(arr_xor([0 0 1 1 0]),0))\r\n  assert(isequal(arr_xor([0;1;1;1;0]),1))\r\ncatch\r\n  disp('incorrect work for vectors, +10 points of penalty');\r\n  penalty=penalty+10;\r\nend\r\n% format conversion\r\ntry\r\n  assert(isequal(arr_xor(['MATLAB';'matlab']'),[0 0]))\r\ncatch\r\n  disp('no conversion from char, +2 points of penalty' )\r\n  penalty=penalty+2;\r\nend\r\ntry\r\n  assert(all(arr_xor(randi(5,5))))\r\n  assert(~any(arr_xor(randi(6,6))))\r\ncatch\r\n  disp('no conversion from double, +5 points of penalty' )\r\n  penalty=penalty+5;\r\nend\r\nfor l=1:4\r\n  stime(l)=tic;\r\n  for k=2:750\r\n    [~]=arr_xor(randi([0 1],k));\r\n  end\r\n  time(l)=toc(stime(l));\r\nend\r\ntime=min(time);\r\ndisp(['elapsed time is ' num2str(time*1000) ' ms.'])\r\n%score calculation\r\nt = mtree('arr_xor.m','-file');\r\nsize = length(t.nodesize);\r\nfeval(@assignin,'caller','score',size + penalty + 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