[Tarantino]

Hello all

I want to do a simple math in TUI as the following:

(define a pick-a-real "report surface-integrals volume-flow-rate bc1 ,,")
(define b pick-a-real "report surface-integrals volume-flow-rate bc2 ,,")

(- a b)

and I got this error:

Error: - (subtract): invalid argument [1]: wrong type [not a number]
Error Object: #[compound-procedure]


I tried also:

(rpsetvar 'x (pick-a-real "report surface-integrals volume-flow-rate bc1 ,,"))
(rpsetvar 'y (pick-a-real "report surface-integrals volume-flow-rate bc2 ,,"))

(- x y)

and I got this error:

Error: eval: unbound variable
Error Object: x

Anyone know what is the problem and how can I fix it?
Thanks.

[AlexanderZ]

Hello,
you may try this approach

(define (make-new-rpvar name default type)
	(if (not (rp-var-object name))
	(rp-var-define name default type #f)))  ; function for creation new variables
(make-new-rpvar 'x 0.0 'real) ;define new variable x
(rpsetvar 'x (pick-a-real "report surface-integrals volume-flow-rate p ,,")) ; set x value
(rpgetvar 'x) ; get x value

Hope it works.

Best regards

[Tarantino]

Originally Posted by AlexanderZ

Hello,
you may try this approach

(define (make-new-rpvar name default type)
	(if (not (rp-var-object name))
	(rp-var-define name default type #f)))  ; function for creation new variables
(make-new-rpvar 'x 0.0 'real) ;define new variable x
(rpsetvar 'x (pick-a-real "report surface-integrals volume-flow-rate p ,,")) ; set x value
(rpgetvar 'x) ; get x value

Hope it works.

Best regards

Hi, thanks for your reply.
I think you misunderstood my question.
I successfully define the variables, but cannot do the math on those variables!
You explain how ca I define variable "x" and assign the volume flow rate of a BC to it. There is no problem in this section.
However, how to add a number to "x" for instance. Why
(+ x 2) won't work!

[AlexanderZ]

Originally Posted by Tarantino

Hi, thanks for your reply.
I think you misunderstood my question.
I successfully define the variables, but cannot do the math on those variables!
You explain how ca I define variable "x" and assign the volume flow rate of a BC to it. There is no problem in this section.
However, how to add a number to "x" for instance. Why
(+ x 2) won't work!

If you want for instance x+2 you may use this expression

(rpsetvar 'x (+ (rpgetvar 'x) 2))
(rpgetvar 'x)

you will see x+2 in console output.

Best regards

[Tarantino]

Originally Posted by AlexanderZ

If you want for instance x+2 you may use this expression

(rpsetvar 'x (+ (rpgetvar 'x) 2))
(rpgetvar 'x)

you will see x+2 in console output.

Best regards

This works fine.
Thank you so much.