topic The value must be a vector-optimizer question in Mathcad

The value must be a vector-optimizer question

DanJoffe — Thu, 03 May 2018 19:47:23 GMT

When I try to use the optimizer, I often get this error complaint "value must be a vector" in the optimization step. But I don't know what it's really complaining about. Can someone help?

The value must be a vector-optimizer question

StuartBruff — Thu, 07 Jan 2010 08:00:00 GMT

On 1/7/2010 2:15:48 PM, djoffe wrote:
== When I try to use the optimizer, I often get this error complaint "value must be a vector" in the optimization step. But I don't know what it's really complaining about.

You've applied the vectorize operator to optfun - which in turn applies to each argument, including p & z. This means that optfun calls gammamod with scalar p & z, whereas gammamod expects them to be vectors; hence the complaint as gammamod tries to take the indices of p & z.

Stuart

The value must be a vector-optimizer question

DanJoffe — Thu, 07 Jan 2010 08:00:00 GMT

Thanks...I pulled the vectorize off the left hand side in the minerr...the optimization took off running quite happily to a great answer.

Thanks again...

The value must be a vector-optimizer question

ptc-1368288 — Sun, 10 Jan 2010 08:00:00 GMT

On 1/7/2010 5:20:12 PM, djoffe wrote:
>Thanks...I pulled the
>vectorize off the left hand
>side in the minerr...the
>optimization took off running
>quite happily to a great
>answer.
>
>Thanks again...
______________________________

You mean everything is OK ?
Don't understand from quick reading.

jmG