chao | 🍏 This is my toy lisp implementation | Interpreter library
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This is my toy lisp implementation
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QUESTION
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
...ANSWER
Answered 2021-Apr-30 at 15:49The initial value should be
QUESTION
I have an html tag as a string. If 'md' is included in the class attribute in this tag, I want to select it and get the expression in the tag.
Example:
'(expression)
is first selector
- Class attribute included
md
is second selector - At the same time, the tag should not be empty.
I mean, I need a regex that starts with and ends with
and gives tag with
md
in class attribute, but I couldn't get out of it.
What I did is trying to select those with direct md attribute, but this is wrong. Also problem with nested tag ones as well.
...ANSWER
Answered 2021-May-29 at 11:49If you have no parser or dom available and can only get the parts from the string with a pattern, you might get away with:
QUESTION
I'm implementing Kube-monkey in my dev Kubernetes cluster, and can see that the PODs are getting terminated every 30 seconds.
Could someone please help me to set POD termination interval in Kube-monkey(Chaos Monkey for Kubernetes clusters) to some other time?
I tried setting interval
parameter in the kube-monkey yaml file (as below) to terminate the PODs every 5 minutes, but doesn't work.
ANSWER
Answered 2021-May-21 at 04:22If you see the official helm chart values.yaml there is no interval key. since you have kept schedule_immediate_kill :
TRUE default kill time will be 30S
https://github.com/asobti/kube-monkey/blob/master/helm/kubemonkey/values.yaml
you can change the interval time using schedule_delay
QUESTION
like my title said I struggle with this though below is a example
...ANSWER
Answered 2021-May-31 at 08:25You could take a function which removes the object at the given index.
The function takes the removed array, takes the object at start and gets the id
then it loops from the index until the end and updates all id
properties.
QUESTION
Am building a movies App where i have list of posters loaded using TMDB using infinite_scroll_pagination 3.0.1+1 library. First set of data loads good but after scrolling and before loading second set of data i get the following Exception.
...ANSWER
Answered 2021-May-30 at 10:18In Result
object with ID 385687 you have a property backdrop_path
being null. Adjust your Result
object and make the property nullable:
String? backdropPath;
QUESTION
hope you're all fine.
That's my first question, so I'm sorry if something's not right about it.
I'm studying numerical stability and chaoticity of some dynamical systems, more specifically, about the Circular Restricted Three Body Problem (CR3BP), defined by the set of 3 second order differential equations. After transforming those three second order differential equations in six first order differential equations as seen here i can finally finally work with them numerically using scipy's ODEINT. Here's an example of an orbit integrated for T = 2^10 with n = 2^18 points (np.linspace(1, 2^10, 2^18)) and here's a bit of my code for this, the main function to be integrated:
...ANSWER
Answered 2021-May-28 at 07:13This is probably due to the step size control being also influenced by the rapidly growing v
vector. Either by regulating step sizes rapidly down due to stiffness, or more likely, due to increasing the step size to match the dominant components, thus becoming unsuitable for an exact integration of the original trajectory. This rapid growth is the reason that Lyapunov exponents were introduced, as they capture this growth in nicely bounded numbers.
What you can do is to split up the integration into smaller chunks and normalize the v
vector at the start of each chunk. One would have to experiment on how long it takes until the v
component unduly dominates the step size control. As the coupling is purely multiplicative, the dynamic theoretically is linear. So it could also help if you scale the initial v
to have norm 1e-100
.
First however check what error tolerances you use. Setting them narrower also tends to stabilize the computation. You might also get some progress be setting the maximal step size hmax
to half or so of the external step.
Or you could do the Lyapunov exponent computation like I explored in https://scicomp.stackexchange.com/questions/36013/numerical-computation-of-lyapunov-exponent. This approach however increases a system of dimension n
by the n x n
matrix of eigen/singular vectors and the n
products of exponents times time.
QUESTION
I asked a question yesterday about how to turn a JSON file into a dataframe, but I was asking the wrong question
I have a JSON file that looks like the below
There are two levels of keys (some times repeating and other times not)
...ANSWER
Answered 2021-May-25 at 12:39Use nested list comprehension with append dict to values of nested ditionaries and pass to DataFrame
constructor:
QUESTION
I have a nest JSON file that looks like the below (first 2 of many objects):
...ANSWER
Answered 2021-May-25 at 06:37I'd suggest a list-comprehension
that reads your dict
:
QUESTION
I have basically created 2 Xmls. one where the user enters the phone number and then on pressing a button it goes to the OTP verification screen. But the issue here is that I am not receiving any OTP from Firebase, but after 5 sec I get a toast message that the verification failed. How could it fail if I haven't even got the message. I also tried putting another number so that I can enter the code manually. But Firebase isn't sending me the OTP.
BASIC IMPLEMENTATION --- click Forgot Password -> Ask for Mobile Num ->Verify Otp ->Reset Password->Login Page
P.S I have enabled the phone authentication in Firebase.
OtpActivity.java
...ANSWER
Answered 2021-May-22 at 06:56Add Country code (+91 for India) before the user phone number. It will Work.
QUESTION
I'm new to Django, and today when I tried to run a website with a database, I have encountered this error. I have searched for all solutions on StackOverflow and Django documents, but I can not fix it.
This is the problem that similar to me, but it doesn't work.
I want to create a link that moves user from user.html in user to index.html in citizens
Here is my project structure. I'm sorry because I can't attach an image, so I will try to explain it in easiest way.
[MYPROJECT]
->manage.py
->citizens (folder)
-->templates (inside this folder I have citizen.html, index.html, layout.html)
-->admin.py
-->models.py
-->tests.py
-->urls.py
-->views.py
->myproject (folder)
-->setting.py
-->urls.py
-->etc that I think not important
->user (folder)
-->templates (inside this folder I have login.html, user.html, layout.html)
-->urls.py
-->views.py
-->etc that I think not important
As you can see, I have user.html inside templates folder of user, and index.html inside templates folder of citizens.
Here is my code:
index.html inside citizens
...ANSWER
Answered 2021-May-12 at 13:16You have tried to use {% url 'citizen:citizens/' %}
here the part before :
(citizen
) is a url namespace and the part after it (citizens
) is the url name. But you haven't used any namespace, and neither do you have a url name as citizens
.
You can add a namespace in citizens.urls
by specifying app_name
:
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