Use List box to change variable in Formula

[Bwilliams]

I know this is a basic issue but for some reason, I can not get it to work properly for me.  I have a list box that has options for Q1, Q2, Q3. I want users to select which option they wish to run(Q1 or Q2 or Q3) and based on the user's selections the variable will change to the selection in the formula tool. 

So if user select Q1 all the variable will be Q1 in the formula tool

From the image i want the variable to be users selections. 

[grazitti_sapna]

@Bwilliams, try something like this.

Output

Attaching the sample workflow.

I hope this helps!

Thanks!

[DataNath]

@Bwilliams if you just want the user to make a single selection, I'd recommend using a dropdown instead of a list box. How is your Action tool configured? I'd imagine that's the most likely cause. Are you making sure to only update the specific part of your expression, like so?

[Bwilliams]

@grazitti_sapna  thanks this was helpful, didn't resolve my issue but give me another idea on how it can be done. however, how can the output shown in the app output be also shown in the browse tool.

[grazitti_sapna]

@Bwilliams, will it be possible for you to share a sample dataset and the workflow that you are trying to implement so that I can make amendments to the same?

Thanks!