k3 | action language providing open class mechanism to xtend/java | Build Tool library

I'm attempting to solve a set of equations related to biological processes. One equation (of about 5) is for a pharmacokinetic (PK) curve of the form C = Co(exp(k1*t)-exp(k2*t). The need is to simultaneously solve the derivative of this equation along with some enzyme binding equations and initial results where not as expected. After troubleshooting, realized that the PK derivative doesn't numerically integrate by itself, if k is negative using the desolve ode function. I've attempted every method (lsode, lsoda, etc) in the ode function, with no success. I've tried adjusting rtol, it doesn't resolve.

Is there an alternative to the deSolve ode function I should investigate? Or another way to get at this problem?

Below is the code with a simplified equation to demonstrate the problem. When k is negative, the integrated solution does not match the analytical result. When k is positive, results are as expected.

First Image, result with k=0.2: Analytical and Integrated results match when k is positive

Second Image, result with k=-0.2: Integrated result does not match analytical when k is negative

I have a dataframe with column grade which contains categorical values. My problem result in the fact, that the type of the values are float and not object.

I am trying to plot the phase space trajectories for the Hindmarsh-Rose model. I have implemented an RK4 integrator to solve the following set of equations:

The code that I have written so far is given below.

Given the xml:

i copy data from one datasheet to another. At the moment i'm inserting every new row in the target sheet above the last inserted line with

I am receiving a dataframe from an API that has data for some entities in the inital columns, and the later columns contain metadata for those entities. The data is proprietary so I cannot show it exactly, but the structure of dataframe is exactly like below:

I need some help converting the response of an XHR GET to a useable array (preferrably 2 arrays, but not strictly needed). I'm trying to get some data fra sql but I can't figure out how to decode/parse the response from my GET request into any form of useable array.

I'm sorry if this is a stupid question, but I'm new and trying to learn. I've tried both json_decode() in the php bit and JSON.parse() in the JS bit, but neither of those work (again, sorry, It's probably obvious why but this is tbh abit beyond my current capabilities)

Code snippets follow below:

GET response is a string and looks like example below (array.length of first section will always be static. array.length of second array will vary from 1->50ish)

Bit of a tricky question. I'm having the columns F:K with the numbers in Sheet1

Is there a excel formula to copy all the values from sheet 1 excluding blanks and display them in Column B in sheet2 .

The order of displaying them in sheet 2 in column B should be horizontal so if any values in F2;G2;H2;I2;J2;K2 F3;G3;H3;I3;J3;K3 and so on should be display in that order

Columns with the numbers

So the expected output in sheet2 should be as folow

Many thanks in advance

Could anyone help me to join two tables without common columns?

I have two tables:

Tab1

Tab2

The result of select should be:

How do I do that?