How to save /adjoint/observable/evaluate result to scheme variable?

ProBioticum · December 19, 2018, 13:40

I have an observable ld(lift drag ratio) which I'm calculating through scheme script by which is calling command /adjoint/observable/evaluate.

The result is printed to TUI console.

Code:

Observable name: ld
Observable Value (undefined): 2.6054044

But I need to get that same calculation result into some variable in scheme script so the next statement could read that variable and operate with it.

For example the scheme script should look like this:

Code:

1. apply command  /adjoint/observable/evaluate
2. save that ld value to scheme variable
3. do something next with that variable

How can I save that calculation result into scheme variable?

AlexanderZ · December 19, 2018, 23:44

try to use following command

Code:

(rpgetvar 'monitor/lift)

what output do you have?

best regards

ProBioticum · January 6, 2019, 05:57

Code:

(rpgetvar 'monitor/lift)

Gives result

Code:

()

AlexanderZ · January 7, 2019, 01:44

you may get lift/drag coef value using following command

Code:

(car (cdr (car (rpgetvar 'adjoint/multiobjective-data ))))

create your own rpvar variable

Code:

	(define (make-new-rpvar name default type)
	(if (not (rp-var-object name))
	(rp-var-define name default type #f)))
(make-new-rpvar 'my_lift/drag 0.0 'real)

set your variable equal to computated ld ratio

Code:

(rpsetvar 'my_lift/drag (car (cdr (car (rpgetvar 'adjoint/multiobjective-data )))))

check

Code:

(rpgetvar 'my_lift/drag)

now you can use it in scheme as well as in UDF

best regards

ProBioticum · May 10, 2019, 17:07

Thank you for your contribution. The solution you proposed worked for the observable `ld`. How would I get values of other observables (lift, drag, le_moment)?

riccardo.frezza · October 8, 2019, 08:55

Hi, I'm new in using the scheme language and I need to get the "pressure-drop" observable into a variable in scheme script. Did you find a different solution? With (rpgetvar 'adjoint/multiobjective-data) it shows me the pressure-drop observable value. Adjoint/multiobjective-data isn't a TUI command. Where can I find those commands?

December 19, 2018, 13:40	How to save /adjoint/observable/evaluate result to scheme variable?	#1
ProBioticum New Member Join Date: Dec 2018 Posts: 3 Rep Power: 7	I have an observable ld(lift drag ratio) which I'm calculating through scheme script by which is calling command /adjoint/observable/evaluate. The result is printed to TUI console. Code: Observable name: ld Observable Value (undefined): 2.6054044 But I need to get that same calculation result into some variable in scheme script so the next statement could read that variable and operate with it. For example the scheme script should look like this: Code: 1. apply command /adjoint/observable/evaluate 2. save that ld value to scheme variable 3. do something next with that variable How can I save that calculation result into scheme variable?

December 19, 2018, 23:44		#2
AlexanderZ Senior Member Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34	try to use following command Code: (rpgetvar 'monitor/lift) what output do you have? best regards

January 6, 2019, 05:57		#3
ProBioticum New Member Join Date: Dec 2018 Posts: 3 Rep Power: 7	Code: (rpgetvar 'monitor/lift) Gives result Code: ()

January 7, 2019, 01:44		#4
AlexanderZ Senior Member Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34	you may get lift/drag coef value using following command Code: (car (cdr (car (rpgetvar 'adjoint/multiobjective-data )))) create your own rpvar variable Code: (define (make-new-rpvar name default type) (if (not (rp-var-object name)) (rp-var-define name default type #f))) (make-new-rpvar 'my_lift/drag 0.0 'real) set your variable equal to computated ld ratio Code: (rpsetvar 'my_lift/drag (car (cdr (car (rpgetvar 'adjoint/multiobjective-data ))))) check Code: (rpgetvar 'my_lift/drag) now you can use it in scheme as well as in UDF best regards riccardo.frezza likes this.

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May 10, 2019, 17:07		#5
ProBioticum New Member Join Date: Dec 2018 Posts: 3 Rep Power: 7	Thank you for your contribution. The solution you proposed worked for the observable `ld`. How would I get values of other observables (lift, drag, le_moment)?

October 8, 2019, 08:55		#6
riccardo.frezza New Member Riccardo Frezza Join Date: Dec 2018 Posts: 12 Rep Power: 7	Hi, I'm new in using the scheme language and I need to get the "pressure-drop" observable into a variable in scheme script. Did you find a different solution? With (rpgetvar 'adjoint/multiobjective-data) it shows me the pressure-drop observable value. Adjoint/multiobjective-data isn't a TUI command. Where can I find those commands?