The OPAL Discussion Forum

["Adelmann Andreas (PSI)" <andreas.adelmann AT psi.ch>]

Hi Simon

REAL VECTOR rf_settings = {10.1,11.1};

REAL a = rf_settings[1];

REAL b = rf_settings[2];

VALUE, a;

VALUE, b;

VALUE, {rf_settings[1]};

this works fine. OPAL uses the FORTRAN indexing, i.e. we start with 1 not 0.

You also need { } around the vector variable.

Cheers A

------
Dr. sc. math. Andreas (Andy) Adelmann
Head a.i. Labor for Scientific Computing and Modelling 
Paul Scherrer Institut OHSA/ CH-5232 Villigen PSI
Phone Office: xx41 56 310 42 33 Fax: xx41 56 310 31 91
Zoom ID: 470-582-4086 Password: AdA
-------------------------------------------------------
Friday: ETH HPK G 28   +41 44 633 3076
============================================
The more exotic, the more abstract the knowledge, 
the more profound will be its consequences.
Leon Lederman 
============================================

On 8 Aug 2020, at 12:37, Simon Friederich <sifriede AT uni-mainz.de> wrote:

Hello Joachem and Andreas,

Thank you for your replies. Yes, I've figured out, that I missed "vector" in the array declaration.

But I still can't access single elements:

...
OPAL> This is OPAL (Object Oriented Parallel Accelerator Library) Version 2.3.0
OPAL>             git rev. 788bd1b6cec32045efe14a8754ff1b169aab3565
...

OPAL> 
==>REAL vector myvector = {1,2,3};
    1 REAL vector myvector = {1,2,3};
==>VALUE, myvector[0];
    2 VALUE, myvector[0];
Error> 
Error> *** Parse error detected by function "OpalParser::parseEnd()"
Error> *** in line 2 of file "standard input" before token "[":
Error>     VALUE,MYVECTOR[0];
Error>                    ^
Error>     Syntax error (maybe missing comma or semicolon ? )

I'm I missing something here?

Best regards,

Simon

Am 07.08.2020 um 15:40 schrieb Snuverink Jochem (PSI):

Dear Simon,

 

As Christof wrote in the bug report, the correct syntax is “REAL VECTOR= {};

I am not aware of the option of 2D-arrays.

 

So perhaps then:

 

REAL VECTOR volts = {7.5, 8.0, 8.5, 9.0, 9.5};

REAL VECTOR lags = {239.32815,... };

pb1: RFCAVITY, ...., VOLT = volts[0] * 1e-3, LAG = lags[0] * PI / 180, ...;

 

Note that you can also do:

 

REAL VECTOR volts = {7.5, 8.0, 8.5, 9.0, 9.5} * 1e-3; // in MV

REAL VECTOR lags = {239.32815,... } * PI / 180; // in rads

 

pb1: RFCAVITY, ...., VOLT = volts[0], LAG = lags[0], ...;

 

Best wishes,

Jochem

 

From: opal-request AT lists.psi.ch <opal-request AT lists.psi.ch> On Behalf Of Adelmann Andreas (PSI)
Sent: Freitag, 7. August 2020 08:33
To: Simon Friederich <sifriede AT uni-mainz.de>
Cc: opal AT lists.psi.ch
Subject: Re: [Opal] Arrays and tables

 

Dear Simon, indeed it seams that he array feature is broken. 

Even a one dimensional real array does not work. I will file a bug report.

Thanks for reporting! 

 

Cheers A

------
Dr. sc. math. Andreas (Andy) Adelmann
Head a.i. Labor for Scientific Computing and Modelling 
Paul Scherrer Institut OHSA/ CH-5232 Villigen PSI
Phone Office: xx41 56 310 42 33 Fax: xx41 56 310 31 91
Zoom ID: 470-582-4086 Password: AdA
-------------------------------------------------------
Friday: ETH HPK G 28   +41 44 633 3076
============================================
The more exotic, the more abstract the knowledge, 
the more profound will be its consequences.
Leon Lederman 
============================================

On 5 Aug 2020, at 11:44, Simon Friederich <sifriede AT uni-mainz.de> wrote:

 

Dear OPAL-Team,

I have a set of configuration parameters for an RFCAVITY element:

volt   lag
7.5    239.328125
8.0    239.2578125
8.5    239.18359375
9.0    239.08984375
9.5    239.01953125

I tried but failed to get the correctly needed syntax: 
Can I use an array or table somehow like this?

REAL rf_settings = {
{7.5, 239.328125}, 
{8.0, 239.2578125}, 
{8.5, 239.18359375}, 
{9.0, 239.08984375}, 
{9.5, 239.01953125}, 
};

And then use (e.g. setting 0):

pb1: RFCAVITY,...,VOLT=rf_settings[0][0]*1e-3, LAG=rf_settings[0][1]*PI/180,...;

Thank you very much in advance!

Best regards
Simon

-- 

-----------------------------------

Dr. Simon Friederich

Helmholtz-Institut Mainz

Kollaboration B/ACID

Johannes Gutenberg-Universität Mainz

Staudingerweg 18

55128 Mainz, Deutschland

Tel.: +49 (0)6131 39-23160

E-Mail: sifriede AT uni-mainz.de

----------------------------------------

 

-- 
-----------------------------------
Dr. Simon Friederich
Helmholtz-Institut Mainz
Kollaboration B/ACID
Johannes Gutenberg-Universität Mainz
Staudingerweg 18
55128 Mainz, Deutschland

Tel.: +49 (0)6131 39-23160
E-Mail: sifriede AT uni-mainz.de
----------------------------------------