{"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":55415,"title":"3D Plots and Colorbars","description":"Use the matrices X, Y, and Z provided in the function template to create a surface plot. Add a colorbar to the surface plot and label its y-axis  \"Here is a colorbar\". Your function should return the figure handle as output.\r\n","description_html":"\u003cdiv style = \"text-align: start; line-height: 20.4333px; min-height: 0px; white-space: normal; color: rgb(0, 0, 0); font-family: Menlo, Monaco, Consolas, monospace; font-style: normal; font-size: 14px; font-weight: 400; text-decoration: rgb(0, 0, 0); white-space: normal; \"\u003e\u003cdiv style=\"block-size: 72px; display: block; min-width: 0px; padding-block-start: 0px; padding-top: 0px; perspective-origin: 407px 36px; transform-origin: 407px 36px; vertical-align: baseline; \"\u003e\u003cdiv style=\"block-size: 42px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; perspective-origin: 384px 21px; text-align: left; transform-origin: 384px 21px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 379.5px 8px; transform-origin: 379.5px 8px; unicode-bidi: normal; \"\u003e\u003cspan style=\"\"\u003eUse the matrices X, Y, and Z provided in the function template to create a surface plot. Add a colorbar to the surface plot and label its y-axis  \"Here is a colorbar\". Your function should return the figure handle as output.\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv style=\"block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; perspective-origin: 384px 10.5px; text-align: left; transform-origin: 384px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 8px; transform-origin: 0px 8px; unicode-bidi: normal; \"\u003e\u003cspan style=\"\"\u003e\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003c/div\u003e\u003c/div\u003e","function_template":"function f = myfunction\r\n   f = figure; % gets the figure handle\r\n   [X,Y,Z] = sphere(20);\r\n\r\n\r\nend","test_suite":"%% Check surface plot\r\nf = myfunction;\r\ns__ = findobj(f,'Type','surface');\r\nassert( ~isempty(s__) )\r\n%% Check XData\r\nf = myfunction;\r\n[X,Y,Z] = sphere(20);\r\ns__ = findobj(f,'Type','surface');\r\nassert(isequaln(X(:),s__.XData(:)))\r\n%% Check YData\r\nf = myfunction;\r\n[X,Y,Z] = sphere(20);\r\ns__ = findobj(f,'Type','surface');\r\nassert(isequaln(Y(:),s__.YData(:)))\r\n%% Check ZData\r\nf = myfunction;\r\n[X,Y,Z] = sphere(20);\r\ns__ = findobj(f,'Type','surface');\r\nassert(isequaln(Z(:),s__.ZData(:)))\r\n%%\r\nf = myfunction;\r\nassert(isequal(f.Children(1).Type,'colorbar'))\r\n%%\r\nf = myfunction;\r\nassert(isequal(f.Children(1).Label.String,\"Here is a colorbar\"))","published":true,"deleted":false,"likes_count":4,"comments_count":2,"created_by":140016,"edited_by":287,"edited_at":"2022-10-10T14:36:25.000Z","deleted_by":null,"deleted_at":null,"solvers_count":259,"test_suite_updated_at":"2022-10-10T14:26:00.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2022-09-02T17:46:13.000Z","updated_at":"2026-05-08T12:47:39.000Z","published_at":"2022-10-10T14:26:00.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"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\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eUse the matrices X, Y, and Z provided in the function template to create a surface plot. Add a colorbar to the surface plot and label its y-axis  \\\"Here is a colorbar\\\". Your function should return the figure handle as output.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\",\"relationship\":null}],\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"target\":\"/matlab/document.xml\",\"relationshipId\":\"rId1\"}]}"}],"problem_search":{"problems":[{"id":55415,"title":"3D Plots and Colorbars","description":"Use the matrices X, Y, and Z provided in the function template to create a surface plot. Add a colorbar to the surface plot and label its y-axis  \"Here is a colorbar\". Your function should return the figure handle as output.\r\n","description_html":"\u003cdiv style = \"text-align: start; line-height: 20.4333px; min-height: 0px; white-space: normal; color: rgb(0, 0, 0); font-family: Menlo, Monaco, Consolas, monospace; font-style: normal; font-size: 14px; font-weight: 400; text-decoration: rgb(0, 0, 0); white-space: normal; \"\u003e\u003cdiv style=\"block-size: 72px; display: block; min-width: 0px; padding-block-start: 0px; padding-top: 0px; perspective-origin: 407px 36px; transform-origin: 407px 36px; vertical-align: baseline; \"\u003e\u003cdiv style=\"block-size: 42px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; perspective-origin: 384px 21px; text-align: left; transform-origin: 384px 21px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 379.5px 8px; transform-origin: 379.5px 8px; unicode-bidi: normal; \"\u003e\u003cspan style=\"\"\u003eUse the matrices X, Y, and Z provided in the function template to create a surface plot. Add a colorbar to the surface plot and label its y-axis  \"Here is a colorbar\". Your function should return the figure handle as output.\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv style=\"block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; perspective-origin: 384px 10.5px; text-align: left; transform-origin: 384px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 8px; transform-origin: 0px 8px; unicode-bidi: normal; \"\u003e\u003cspan style=\"\"\u003e\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003c/div\u003e\u003c/div\u003e","function_template":"function f = myfunction\r\n   f = figure; % gets the figure handle\r\n   [X,Y,Z] = sphere(20);\r\n\r\n\r\nend","test_suite":"%% Check surface plot\r\nf = myfunction;\r\ns__ = findobj(f,'Type','surface');\r\nassert( ~isempty(s__) )\r\n%% Check XData\r\nf = myfunction;\r\n[X,Y,Z] = sphere(20);\r\ns__ = findobj(f,'Type','surface');\r\nassert(isequaln(X(:),s__.XData(:)))\r\n%% Check YData\r\nf = myfunction;\r\n[X,Y,Z] = sphere(20);\r\ns__ = findobj(f,'Type','surface');\r\nassert(isequaln(Y(:),s__.YData(:)))\r\n%% Check ZData\r\nf = myfunction;\r\n[X,Y,Z] = sphere(20);\r\ns__ = findobj(f,'Type','surface');\r\nassert(isequaln(Z(:),s__.ZData(:)))\r\n%%\r\nf = myfunction;\r\nassert(isequal(f.Children(1).Type,'colorbar'))\r\n%%\r\nf = myfunction;\r\nassert(isequal(f.Children(1).Label.String,\"Here is a colorbar\"))","published":true,"deleted":false,"likes_count":4,"comments_count":2,"created_by":140016,"edited_by":287,"edited_at":"2022-10-10T14:36:25.000Z","deleted_by":null,"deleted_at":null,"solvers_count":259,"test_suite_updated_at":"2022-10-10T14:26:00.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2022-09-02T17:46:13.000Z","updated_at":"2026-05-08T12:47:39.000Z","published_at":"2022-10-10T14:26:00.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"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\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eUse the matrices X, Y, and Z provided in the function template to create a surface plot. 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