Assign string to set of constants

[dalbyoj]

I am trying to create a Labview that will allow me to enter the name of a string which will correspond to two constants of my choosing, a and b, which are numbers.

I can not find a solution to my problem, I do not want to find the equivalent of my string in numbers.

The string would be something like Helium. Inputing helium would correspond to a value of a=4 and b =2

I need to do this for 5 more string inputs with different a and b values.

Does anyone have any guidance as to where to find instructions on how to do this or maybe you even know the solution?

[apok]

---

@dalbyoj wrote:

I am trying to create a Labview that will allow me to enter the name of a string which will correspond to two constants of my choosing, a and b, which are numbers.

I can not find a solution to my problem, I do not want to find the equivalent of my string in numbers.

The string would be something like Helium. Inputing helium would correspond to a value of a=4 and b =2

I need to do this for 5 more string inputs with different a and b values.

Does anyone have any guidance as to where to find instructions on how to do this or maybe you even know the solution?

---

Welcome to the NI forums!  your problem can be easily solved in many different ways with LabVIEW ....   show us what you have done so far?

[dalbyoj]

It looks something like this, but I have not done it correctly. Currently I have no sub vi that works at all yet. I need where it says helium to be an input which corresponds to a string name. From that string name I need to find a way to import different a and b values. This is just a rough skeleton of where I am trying to get if I insert the a and b values as inputs. Does that make sense? 

I am in an introductory engineering course and we use labview to solve problems, but they do not want me to manually input the a and b every time. Rather I need to only input the Element name, Specfic Gas Volume, and Absolute Temperature.

[RavensFan]

Create either an enum or a ring control that has the names of your elements.

Create a 2-D array constant.  Column 0 is your A, column 1 is your B.  Each row represents an element from your enum or ring constant.

Wire the enum or ring constant to an Index Array for that array constant, you'll get a 1-D array for that corresponding row.  Then index array on that to break out the A value and B value.

[Drew_T · Accepted solution]

I illustrated RavensFan's explanation below.  However, I created an array of clusters instead of a 2D array to make things a bit more readable.

[dalbyoj]

Wow awesome you guys were a great help!!!

Now to get this thing to work output and calculate like it is supposed to, which I should be able to figure out from here with a little trial and error. Much appreciated!