The OPAL Discussion Forum

["Frey Matthias (PSI)" <matthias.frey AT psi.ch>]

Dear Bettina

> Does anybody know how to run this?

That's true, the sampler does not accept string input. Since there are only 3 possibilities you could do an if-else in the tmpl-file and

sample an integer.

> Are changes to the sampler software necessary?

Yes. But I think it would be a small change.

Best,

Matthias

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Von: opal-request AT lists.psi.ch [opal-request AT lists.psi.ch]" im Auftrag von "Kuske, Bettina [bettina.kuske AT helmholtz-berlin.de]
Gesendet: Donnerstag, 11. Juli 2019 13:22
An: opal AT lists.psi.ch
Betreff: [Opal] sampler input

Dear all,

 

I would like to use the sampler for our gun / diagnostic line.

As the cathode position and field flatness are ambiguous, I need to

vary also the gun fieldfile.

 

Lower/Upperbounds accept only numbers, not strings.

I cannot skip these parameters, nor enter ‘dummy’ numbers 1 to 3

while reading the 3 filenames from a file.

 

Using something like 1:“filename“, leads to a ‚1‘ in the input, the string is ignored.

 

To try different filenames is essential for these studies.

Does anybody know how to run this?

Are changes to the sampler software necessary?

 

I greatly appreciate your help!

 

Bettina

 

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