{"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":44276,"title":"Simple spirometer - find your lung capacity from the number and size of soap bubbles in one breath","description":"Assumed that each bubble has practically the same diameter d. Given total number n of bubbles. Find volume v of breath. ","description_html":"\u003cp\u003eAssumed that each bubble has practically the same diameter d. Given total number n of bubbles. Find volume v of breath.\u003c/p\u003e","function_template":"function v = spiro(n,d)\r\n  v=n/d;\r\nend","test_suite":"%%\r\nn=10;\r\nd=6;\r\nassert(spiro(n,d)\u003c365*pi)\r\n\r\n%%\r\nn=10;\r\nd=6;\r\nassert(spiro(n,d)\u003e355*pi)\r\n\r\n%%\r\nn=125;\r\nd=1;\r\nassert(spiro(n,d)\u003c25*pi)\r\n\r\n%%\r\nn=120;\r\nd=1;\r\nassert(spiro(n,d)\u003e19*pi)\r\n\r\n%%\r\nn=12;\r\nd=1;\r\nassert(spiro(n,d)\u003c3*pi)\r\n\r\n%%\r\nn=11;\r\nd=1;\r\nassert(spiro(n,d)\u003epi)\r\n","published":true,"deleted":false,"likes_count":0,"comments_count":0,"created_by":166,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":44,"test_suite_updated_at":"2017-08-08T14:35:56.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2017-08-06T18:54:26.000Z","updated_at":"2026-04-03T06:52:40.000Z","published_at":"2017-08-06T18:54:26.000Z","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\u003eAssumed that each bubble has practically the same diameter d. Given total number n of bubbles. Find volume v of breath.\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":44276,"title":"Simple spirometer - find your lung capacity from the number and size of soap bubbles in one breath","description":"Assumed that each bubble has practically the same diameter d. Given total number n of bubbles. Find volume v of breath. ","description_html":"\u003cp\u003eAssumed that each bubble has practically the same diameter d. Given total number n of bubbles. Find volume v of breath.\u003c/p\u003e","function_template":"function v = spiro(n,d)\r\n  v=n/d;\r\nend","test_suite":"%%\r\nn=10;\r\nd=6;\r\nassert(spiro(n,d)\u003c365*pi)\r\n\r\n%%\r\nn=10;\r\nd=6;\r\nassert(spiro(n,d)\u003e355*pi)\r\n\r\n%%\r\nn=125;\r\nd=1;\r\nassert(spiro(n,d)\u003c25*pi)\r\n\r\n%%\r\nn=120;\r\nd=1;\r\nassert(spiro(n,d)\u003e19*pi)\r\n\r\n%%\r\nn=12;\r\nd=1;\r\nassert(spiro(n,d)\u003c3*pi)\r\n\r\n%%\r\nn=11;\r\nd=1;\r\nassert(spiro(n,d)\u003epi)\r\n","published":true,"deleted":false,"likes_count":0,"comments_count":0,"created_by":166,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":44,"test_suite_updated_at":"2017-08-08T14:35:56.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2017-08-06T18:54:26.000Z","updated_at":"2026-04-03T06:52:40.000Z","published_at":"2017-08-06T18:54:26.000Z","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\u003eAssumed that each bubble has practically the same diameter d. Given total number n of bubbles. Find volume v of breath.\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:\"anatomy\"","page":1,"per_page":50,"sort":"map(difficulty_value,0,0,999) asc"}}