Is there a way the user can change the equation in the formular node from the front panel on the fly, dynamically?

Is there a way the user can change the equation in the formular node from the front panel on the fly, dynamically?

Sorry, I don't think so. That would be pretty cool if you could create a property node for a formula node and then enter a formula on the front panel and use it to update the formula. But you can't create a property node for a formula node and the only way of modifying the formula is by typing it into the formula node on the diagram. And you can't modify a diagram of a running VI.
You could create a VI which is only a formula node with the maximum number of inputs and outputs you expect. Have a button on the calling VI to Edit Formula. When the button is pressed, use a VI server to display the front panel on the formula VI, display a dialog box telling the user how to display the diagram of the formula VI, then stop the calling VI. (You can't edit a sub-VI while t
he calling VI is running). The user will then need to rerun the calling VI to use the new formula.
You might be able to do something by calling MatLab or something like that to get an interactive formula window.

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