{"id":1319,"date":"2016-10-13T10:19:16","date_gmt":"2016-10-13T08:19:16","guid":{"rendered":"http:\/\/www.supagro.fr\/wordpress\/modeleco\/?page_id=1319"},"modified":"2019-06-19T13:18:25","modified_gmt":"2019-06-19T11:18:25","slug":"activite-10-b-afficher-les-valeurs-duales","status":"publish","type":"page","link":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/auto-formation\/sequence1\/cours3-probleme-primal-probleme-dual\/lecon10\/activite-10-b-afficher-les-valeurs-duales\/","title":{"rendered":"Activity 10B : \u00ab Wheat\/maize \u00bb model \u2013 Displaying dual values"},"content":{"rendered":"

Length : around 15 minutes<\/u><\/h4>\n

The objective of this exercise is to display the dual values of equations in a results table which will be presented using the Display command. Consider the following statement of the modelled problem\u00a0:<\/p>\n

\u00a0<\/em>\u00ab\u00a0A given farm can grow two types of crop : wheat and maize. The area to be cultivated must be determined for each crop, knowing that :
\nThe objective of the farmer is to maximize his income.
\nWheat yields 450\u20ac per hectare, maize 1000\u20ac.
\nWheat requires 25 hours of labour per hectare and per year, and maize 50 hours.
\nThe farm area is 50 ha and the farmer can work 2000 hours a year.<\/strong><\/em><\/p>\n

But he can hire hourly workers who get paid 15\u20ac per hour.\u00a0\u00bb<\/strong><\/em><\/p>\n

Run the primal2.gms\u00a0model <\/em>(download it here\u00a0:\u00a0<\/em>primal2.zip<\/em><\/a>\u00a0or from the Model Library),\u00a0<\/em>and save it under a different name (for example <\/em>primal2_result.gms). Add the command lines in order to have the following display :<\/p>\n\n\n\n\n\n\n
<\/td>\nTOTAL<\/td>\nMARGINAL<\/td>\n<\/tr>\n
INCOME<\/td>\n42500<\/td>\n<\/td>\n<\/tr>\n
LAND<\/td>\n50<\/td>\n\u00a0250<\/td>\n<\/tr>\n
LABOUR<\/td>\n2000<\/td>\n15<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\"\"<\/a>\"solution\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Length : around 15 minutes The objective of this exercise is to display the dual values of equations in a results table which will be presented using the Display command. Consider the following statement of the modelled problem\u00a0: \u00a0\u00ab\u00a0A given Continue reading Activity 10B : \u00ab Wheat\/maize \u00bb model \u2013 Displaying dual values<\/span>→<\/span><\/a><\/p>\n","protected":false},"author":92,"featured_media":0,"parent":359,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1319","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/1319","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/users\/92"}],"replies":[{"embeddable":true,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/comments?post=1319"}],"version-history":[{"count":22,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/1319\/revisions"}],"predecessor-version":[{"id":4563,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/1319\/revisions\/4563"}],"up":[{"embeddable":true,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/359"}],"wp:attachment":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/media?parent=1319"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}