# eigenvectors created by numpy.linalg.eig have dots instead of data

I want to calculate complex eigenvectors (Psi functions for shrodinger equation) for 20k*20k matrices, but always gets smth like this: [ 2.99009782e-09 -1.12381299e-08 -2.82346868e-08 …, 6.20967928e-34 -4.80675528e-34 -3.84848719e-35] [ 4.07337553e-08 -1.45976681e-07 -3.47961439e-07 …, 7.43558322e-34 -5.74815572e-34 -4.61317607e-35] [ 5.51921102e-07 -1.88491289e-06 -4.26000711e-06 …, 9.29535407e-34 -7.15304083e-34 -5.78846547e-35] As I understand it just replaces part of data with dots,… Read More eigenvectors created by numpy.linalg.eig have dots instead of data

# Cumulative product for each element over x days in pandas DataFrame

I try to calculate for each element in a Dataframe df1 the cumulative product over x days (for example 3). Is there an efficient way to do that? So far, I only know to generate a normal cumulative product over the rows, without fixing the lookback period to x days (=df2). For example: 2022-01-02 ID1:… Read More Cumulative product for each element over x days in pandas DataFrame

# Why can't my conditional detect an empty char?

I’m trying to create "String Array Count" function. How does it it work? The loop is going to stop if the char is empty, then the length is going to show. The error is, empty char conditional didn’t detect empty char. The result is infinite while loop. Edit : I want the result of my… Read More Why can't my conditional detect an empty char?

# Which should we choose between Effect and Either as a return type of our business services?

With the arrival of Arrow 1.1.x we got the new Effect class. Up to now, my business classes returned Either to model the effect of returning an error or a value, e.g.: @Service class CreateDepartmentUseCaseImpl( private val createDepartmentsDrivenPort: CreateDepartmentsDrivenPort, private val getDepartmentByCodeDrivenPort: GetDepartmentByCodeDrivenPort ) : CreateDepartmentUseCase { override suspend fun execute(param: Department): Either<DomainError, Department> =… Read More Which should we choose between Effect and Either as a return type of our business services?

# does the filter with new date() accept format other than yyyy-mm-dd?

I have a response from mydatepicker in the following format { "isRange":false, "singleDate":{ "date":{ "year":2022, "month":5, "day":13 }, "jsDate":"2022-05-13T03:00:00.000Z", "formatted":"13-05-2022", "epoc":1652410800 }, "dateRange":null } I have a filter that uses the new date(), but it seems that it doesn’t accept it accepting the date in the value dd-mm-yyyy and I would need to display it… Read More does the filter with new date() accept format other than yyyy-mm-dd?

# TensorFlow optimisation during running model speed up Predict

I want to disable a computation of several filters during Predict call with Tensorflow 2 and Keras. Do i have to modify the source code of Tensorflow to achieve that ? >Solution : Short answer: No, you don’t have to modify the Tensorflow source code. Long answer with example detailled here.

# Java, computing the following formula

I am trying the write the formula in the image using Java. However, I get the wrong output. This is what I am so far for the computation. Assume Input is: Loan Amount = 50000 and Length = 3 year.My output is currently "676.08" for ‘Monthly Payment’ and "25661.0" for "Total Interest Payment" ‘Monthly payment’… Read More Java, computing the following formula