Hello everyone,
Does anyone have experience with calculating the arc tangent → arctan(x) for calculating an angle?
Because the function doesn’t seem to exist in the expression editor, do you have any good alternatives?
Many thanks in advance.
Kind regards
Paul
Hey @pwied -
This isn’t possible yet in the expression editor but I just wrote a feature request for this. In the meantime, I did create a custom widget that does exactly this:
It takes inputs:
Whenever the value of X changes, the widget will recalculate the value of the result variable.
In the example video above I show the widget itself visible on the app step, but it can be outside of the viewable area of the app and it will still execute.
customWidget-Trig Operations (1).json (3.0 KB)
Hope this helps,
Pete
Hi @Pete_Hartnett,
great widget.
I would consider, to also start calculating, when the opration changes (and x has a valid value).
That ensures, that you will never have a situation, where you can see a result, that does not fit to your inputs (changing operation after first result was delivered would lead to an unvalid combination on screen).
You could also clear the x value and the result after changing the operation but, I think thts less unser friendly.
Do you get my point?
What do you think?
Thank you very much for your support.
I think there was a small error in the javascript in the calculation of the atan: “res = Math.cos(x)” instead of “res = Math.atan(x)”.
Here is my further development of Pete’s custom widget: Changed calculation of atan and calculation of the result in degrees (instead of rad):
customWidget-Trig Operations.json (3.0 KB)
Many greetings
Paul
Good catch @pwied and @thorsten.langner -
Attached is a V2 of this app that fixes. It now runs the logic on changes to Operation or X and the atan issue is resolved.
customWidget-Trig Operations (1).json (3.0 KB)
I also updated the original post with this version
Pete