Difference: ForumOpsRes0005 (1 vs. 5)

Revision 52019-06-07 - TWikiGuest

Line: 1 to 1

META TOPICPARENT	name="ForumOpsRes"

Discussion Forum » OpsRes Web »

Data Fitting Problem

Line: 32 to 32

META FORM	name="DiscussionTopicForm"
FORM FIELD Title	Title	Data Fitting Problem
FORM FIELD Forum	Forum	ForumOpsRes

Changed:

<
<

META FILEATTACHMENT	attachment="latexf4bf89b6a18f5d813f930d36d660c02c.png" attr="h" comment="" date="1206874083" name="latexf4bf89b6a18f5d813f930d36d660c02c.png" stream="GLOB(0xac8c824)" tmpFilename="latexf4bf89b6a18f5d813f930d36d660c02c.png" user="MichaelOSullivan" version="1"
META FILEATTACHMENT	attachment="latex16198c0c89565daccb5444739f82d925.png" attr="h" comment="" date="1206874083" name="latex16198c0c89565daccb5444739f82d925.png" stream="GLOB(0xa9ccc48)" tmpFilename="latex16198c0c89565daccb5444739f82d925.png" user="MichaelOSullivan" version="1"

>
>

META FILEATTACHMENT	attachment="latex327437a642e8e8ee04f70c18f25b6834.png" attr="h" comment="" date="1559870891" name="latex327437a642e8e8ee04f70c18f25b6834.png" user="BaseUserMapping_666" version="1"
META FILEATTACHMENT	attachment="latex1bb6432509eec6eb357f7a6f0c795b24.png" attr="h" comment="" date="1559870891" name="latex1bb6432509eec6eb357f7a6f0c795b24.png" user="BaseUserMapping_666" version="1"

Revision 42008-04-01 - MichaelOSullivan

Line: 1 to 1

META TOPICPARENT	name="ForumOpsRes"

Discussion Forum » OpsRes Web »

Data Fitting Problem

Line: 22 to 22

How do we evaluate a function in AMPL, for the objective function?

-- TWikiGuest - 31 Mar 2008

Added:

>
>

-- MichaelOSullivan - 01 Apr 2008

<--/commentPlugin-->

META FORM	name="DiscussionTopicForm"

Revision 32008-03-31 - TWikiGuest

Line: 1 to 1

META TOPICPARENT	name="ForumOpsRes"

Discussion Forum » OpsRes Web »

Data Fitting Problem

Line: 17 to 17

For some of the model functions you will need to add constraints to make sure that the solutions stay feasible, e.g., $x - b \geq 0$ (or some small value such as $1^{-10}$ ).

-- MichaelOSullivan - 30 Mar 2008

Added:

>
>

How do we evaluate a function in AMPL, for the objective function?

-- TWikiGuest - 31 Mar 2008

<--/commentPlugin-->

META FORM	name="DiscussionTopicForm"

Revision 22008-03-30 - MichaelOSullivan

Line: 1 to 1

META TOPICPARENT	name="ForumOpsRes"

Discussion Forum » OpsRes Web »

Data Fitting Problem

Line: 7 to 7

If I use starting values for a, b and c, how will I know that the solution is a global optimum?

-- TWikiGuest - 29 Mar 2008

Added:

>
>

You won't without doing a good investigation of the objective function. However, you should try several different starting points too see if you come up with different local minima.

-- MichaelOSullivan - 30 Mar 2008

For some of the model functions you will need to add constraints to make sure that the solutions stay feasible, e.g., $x - b \geq 0$ (or some small value such as $1^{-10}$ ).

-- MichaelOSullivan - 30 Mar 2008

<--/commentPlugin-->

META FORM	name="DiscussionTopicForm"
FORM FIELD Title	Title	Data Fitting Problem
FORM FIELD Forum	Forum	ForumOpsRes

Added:

>
>

META FILEATTACHMENT	attachment="latexf4bf89b6a18f5d813f930d36d660c02c.png" attr="h" comment="" date="1206874083" name="latexf4bf89b6a18f5d813f930d36d660c02c.png" stream="GLOB(0xac8c824)" tmpFilename="latexf4bf89b6a18f5d813f930d36d660c02c.png" user="MichaelOSullivan" version="1"
META FILEATTACHMENT	attachment="latex16198c0c89565daccb5444739f82d925.png" attr="h" comment="" date="1206874083" name="latex16198c0c89565daccb5444739f82d925.png" stream="GLOB(0xa9ccc48)" tmpFilename="latex16198c0c89565daccb5444739f82d925.png" user="MichaelOSullivan" version="1"

Revision 12008-03-29 - TWikiGuest

Line: 1 to 1

Added:

>
>

META TOPICPARENT	name="ForumOpsRes"

Discussion Forum » OpsRes Web »

Data Fitting Problem

If I use starting values for a, b and c, how will I know that the solution is a global optimum?

-- TWikiGuest - 29 Mar 2008

<--/commentPlugin-->

META FORM	name="DiscussionTopicForm"
FORM FIELD Title	Title	Data Fitting Problem
FORM FIELD Forum	Forum	ForumOpsRes

View topic | History: r5 < r4 < r3 < r2 | More topic actions...