nikolai | python bot | Bot library

Currently I'm attempting to solve 4 coupled ODE's to stabilize an inverted pendulum on a cart. I have no problem doing it with ODEINT from Scipy, however, I can't make it work with a manual implementation. Most likely this is due to some weird data formatting done in the 'model' function in the code.

I have tried multiple things to no avail, thus I won't post my error codes, since they range from the size not fitting when adding all the calculated steps in the RK4 method.

My current code with ODEINT working is down below. What I'm asking is whether someone can help me, so that the function 'model' is properly made, so that I can implement the RK4 solver (which I can do for other ODE's without any problem).

is there a good way to create a dplyr pipeline with mutate extracting several columns from a function in a single step? For example, imagine that you have a dataframe like this:

is there an analog to SQL analytic so that one could do aggregation without collapsing rows? For example, I want to do a sum for each group without GROUP BY, in SQL I can do this:

following are my files for html, .ts and json . As json data was very extensive therefore i have just added a few states and their cities. my 1st dropdown is showing all states. Now I want to match my 1st dropdown's selected value of state with a key "state" in "cities" object in my json file so i can populate 2nd dropdown with cities relevant to that state. and I want to do this in function "getCitiesForSelectedState". please help me find solution for this.

//.ts file

I am trying to convert text column to array[text] column in table i have column entry like

['Nikolai Rimsky-Korsakov', 'Jascha Heifetz', 'Arpárd Sándor'] but this is one string or text format I want to convert it into a real array of a string so that I can access a particular name in the above column. I tried converting the type from this link by setting it to type to text[] but the column is just becoming one element of an array like this.

[ "['Nikolai Rimsky-Korsakov', 'Jascha Heifetz', 'Arpárd Sándor']" ]

But what I wanted is to type Array[text] for tat column to able to access particular names.

I have a dataset for credit card transaction.

I split this dataset by group using below code

I have the following graph:

Currently, I'm working on a calculator, that works similar to a 'real' calculator, when determining definite integrals.

Currently i can get it to work with functions such as

• sin(x)
• cos(x)
• e**x
• n*x**x

However, it won't accept math.sqrt(x) as a function in my code, where it simply states, that

I have method that sends an email and I want to make parametrize pytest test, but when I run my test it doesn't run and in logs it shows no tests ran. What's wrong with my test?

pytest scenario: