equation | Automatically create a calculator tool | Apps library

I have a mathematical expression given as a String and I have to extract all the variables which are identified as a letter, possibly followed by a number (e.g x or x0). It works for simple expressions but if I try it with a more complicated equation I pick also numbers which I don't want since my goal is to determinate if the two equations use the same variables.

I am trying the equatiomatic package to plot my lmer model.

I'm trying to write an abbreviate function like so:

I'd like to plot the circle described by the equation |z - 1| = 1 for complex z. I expected the following to work:

I've been reading a lot of stack overflow lately, and I 'd like to thank everyone who's active here for their contributions. This community has helped me a lot in my learning python!

I am trying to put together a pretty simple name generator program, in which every time you press a button in the tkinter GUI a new name is generated into a label widget.

The generator works with the random module picking words from pre-compiled lists and putting them together in combinations, the structures of which are defined in the function 'generate_name'.

I've gotten the program to work fine in console, but I can't figure out how to get it to work with tkinter.

I'm hoping to build a tkinter GUI where you press a button and the output of the 'generate_name' will be displayed on a tkinter label. However, I can't seem to achieve this, and I can only get the output of the function to be displayed in the console.

I've read many posts related to similar problems but I just can't seem to get my head around this. I've tried many alternative approaches to this, and although I have been able to get the outputs of simpler functions to be displayed, e.g. ones where you do simple math equations with variables, I simply can't get the randomly generated name to appear anywhere but the console.

Hopefully I've been able to articulate my problem clearly.

Here is a simplified version of the code I'm working on:

I am writing some code that takes an array of shapes and finds the average of the array. The concept itself is quite simple but I am having problems. What I did to try to implement the method to find the average is that I used a for loop to add all the values of the array together and then I divided the sum with the number of items in the array. Although I understand how to do this clearly, for some reason I am getting problems. For the equation where I continuously add the previous sum to the new sum, the array gives me an error that says "Expression expected". I am not sure on what that means so I used the IDE fix and it created a new private object for me at the top of the class. Then it gives me another error, it says "Array type expected, java.lang.Object" I was unsure so I decided to import the lang.Object into the file but the error remained the same. How can I fix this?

This is my code below:

I need to compute tf.Variable gradients in a class method, but use those gradients to update the variables at a later time, in a different method. I can do this when not using the @tf.function decorator, but I get the TypeError: An op outside of the function building code is being passed a "Graph" tensor error when using @tf.function. I've searched for understanding on this error and how to resolve it, but have come up short.

Just FYI if you're curious, I want to do this because I have variables that are in numerous different equations. Rather than trying to create a single equation that relates all the variables, it is easier (less computationally costly) to keep them separate, compute the gradients at a moment in time for each of those equations, and then incrementally apply the updates. I recognize that these two approaches are not mathematically identical.

Here is my code (a minimal example), followed by the results and error message. Note that when gradients are computed and used to update variables in a single method, .iterate(), there is no error.

I have a function 'get_number(code, attribute)' that outputs a specific section of a code that is associated with a specific piece of information. But I'm not sure how I would use this function within 'print_description(code)' so I can get the specific section of the code when the function only has one return.

Under the 'print_description(code)' docstring, I want to replace those equations 'get_number(code, attribute)'

I want to add a constraint in gams that sums over a variable that takes indices with a shifting gap between them. For example, I have a set of hour (h) in the year. My variable is g(h). My desired equations are: