montecarlo | Using the Monte Carlo methods in problem solving | Reinforcement Learning library
kandi X-RAY | montecarlo Summary
kandi X-RAY | montecarlo Summary
While digging in my hard drive I found an old project that I developed during a math (statistics and probabilities) course of my BSc. The original code was written in Java, but since I've switched to Python I've decided to port it and get a sense about the feeling of porting an application from one programming language to another. It was actually a good experience. I've decided to publish the project just in case it is useful to somebody. It is called montecarlo because it demonstrates how to use the Monte Carlo methods in problem solving. Two different problems are solved. The first one is related with approximating the mathematical number π; the second calculates the probability of having N (where N is a variable) orders of faulty chips during a factory production.
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Top functions reviewed by kandi - BETA
- Calculate circle pi
- Electuct the number of chips in a given region
- Number of faulty orders
- Count the number of values in c
- Return a generator of the pair pairs
- Generate random list
- Count the number of production defaults
- Generate a production number
montecarlo Key Features
montecarlo Examples and Code Snippets
Lines of Code : 19License : Permissive (MIT License)
Copydef monte_carlo(n):
results = 0
for i in range(n):
flip_result = coin_flip()
results = results + flip_result
#Calculating probability value :
prob_value = results/(i+1)
#Append the pro Community Discussions
Trending Discussions on montecarlo
QUESTION
I plan to do a Monte Carlo Simulation, but the introduction on the AnyLogic page does not really help me. I want to vary one parameter via uniform(0,1) and run the model 1000 times and save the results in a excel sheet.
My idea was to have a variable called "durchlaufzeit" which takes the Model Time at the sink. So in the sink I say durchlaufzeit = Math.round(time()). Is this a right way to get the total delay time? Or is there any alternative to it?
The commands in the sink look like this:
So at the end of the Discrete Event Simulation I want to write the entire delay time of the simulation into my ExcelSheet ergebnisse. I have created a monte carlo experiment in the following way:
In my mind MonteCarlo should execute the code I have written into the sink. However, when I run Monte Carlo I have the following problems: If I comment out the problematic code snippets the MonteCarlo Experiment is executed but when I look at my Excel Sheet, there is no data written to it (from the code which is place on the sink). Where could I be mistaken?
...ANSWER
Answered 2022-Mar-16 at 04:16Here are my findings on your issues
The errors you experiencing in the default UI created for the Monte Carlo experiment are just due to shortcomings of the AnyLogic automatic UI creator.
I don't see any code where you write the
durchlaufzeitvalue to the excel sheetAre you sure you are closing the Excel sheet after the experiment? Have you completed the Tutorials and viewed the example model son using Excel files? https://anylogic.help/anylogic/connectivity/excel-file.html#excel-file
That said here is my suggestion:
If you want to run multi experiments, especially in parralele, you have to provide the file that you will be writing to, from out side the model. Else every instance of Main will create, and override the existing file created by other instances...
Thus you need a File object on Monte Carlo (or your normal experiment page) and a parameter on main to pass it to.
I would never use Excel, for various reasons, but rather use a text file. It is small, lightweight, easy to just write in the next line, can be opened in Excel and most importantly - it is thread safe.
So I would have this setup.
It is important to remember to close the text file.
For this simple test I have an event on Main that writes some random data to the textFile parameter on Main which is of type TextFile.
After running the Monte Carlo experiment for 10 iterations, I get 10 random numbers in the text file.
QUESTION
This post is a reference to this one R shiny - checkboxes and action button combination issue.
To summarize the previous post, I want my graphs to be displayed when I click on the "Go" button and updated ONLY when I click on the "Go' button. Currently, after having clicked on "Go" once, they get updated every time you touch the checkboxes. I got some great answers in the previous post but the example I posted ended up being a little too simple and so I'm having a hard time to reproduce the solutions for my current code.
In the MRE that follows (also from R SHINY - Conditional panel output shifted?), there are 3 conditions/functions (instead of 2). Also, the functions output a list of object (as opposed to 1 graph).
Here is the code:
...ANSWER
Answered 2022-Jan-25 at 07:16There is a lot of unnecessary repetition in your code. You can reduce it drastically by using eventReactive and directly pass it to the render* functions - without creating a separate output for each plot - this also avoids the need to use e.g. conditionalPanel or renderUI.
Please check the follwing
QUESTION
I have 2 checkboxes and 1 action button. When clicking on either of the checkboxes, a graph should output BUT only after clicking on the action button. The code I have bellow does this well already. My issue here is that once the action button has been clicked and the graph generated, unclicking the checkbox removes the graph. Similarly, clicking again generates a new graph without clicking on the action button. I would like for the graph to stay on the screen for as long as I dont click on the action button again. I imagine this has to do with "isolating" the checkboxes but Im not too sure how to do so.
As a side note, imagine there was a third function generating a plot in my server when clicking on the action button (regardless of the checkboxes). Is there a way to code my "showmodal, removemodal" such that the pop up stays while all functions are running (instead of only during the first function)?
Here is my code
...ANSWER
Answered 2022-Jan-22 at 06:58The modal is working well, because both functions take so little time to run it creates de sensation than is there less than it should be. We can show this by adding a sys.sleep to simulate a long calculation.
Regarding the checkboxes, using conditionalPanel will hide or show the plots independently of the presence of isolate inside the server. A workaround is just to return NULL when the checkbox is not clicked.
QUESTION
This post is related to R shiny - Checkbox and conditional panels issues. I have here managed to create an MRE of the problem.
To sum it up again, when clicking on the second checkbox OR the first and second checkbox at the same time, the data frame output is shifted... I would like it to be displayed at the same position as it is when you click on the first checkbox.
...ANSWER
Answered 2022-Jan-24 at 03:25Use of renderUI() should help you. Try this
QUESTION
I am doing monte-carlo-integration of a rectangle that contains rectangle/s inside the enclosing rectangle. I want to find out the area of rectangle that is not covered by any of embedded rectangle.
Below are the class of rectangle and the montecarlo integration. I need help in checking whether a point is inside a given rectangle (def inside(...)). I get the error
...ANSWER
Answered 2021-Oct-26 at 20:25Main issue:
- Method inside when used by method area expects a list of rectangles
- Method inside when used inside unittests such as testInsideRectBorderline1Y, expects a single rectange.
- Modified method inside so it takes one or more rectangles
Code
File rectangle.py
QUESTION
I am developing a Quotes app as a beginner Practice project in flutter. I have multiple pages in my app. Right now I want to create an icon button which will perform as a bookmark (Mark as favourite) for the user.And in the app bar there will be a favourite option where the user can find those marked page number.Local databse seems too confusing to me.How can i use Hive for that problem.
...ANSWER
Answered 2021-Oct-19 at 09:51To bookmark or add favorites you need to persist the quotes. For that, you need to add these two packages https://pub.dev/packages/hive and https://pub.dev/packages/hive_flutter. What you are asking is for the whole code so I suggest you go through this easy documentation for hive implementation. https://docs.hivedb.dev/#/README
For a quick overview refer to this code.
After initializing await Hive.initFlutter(); and opening a box await Hive.openBox('testBox'); in main().
Make a box reference in your respective class then add the value box.put('key', 'Value'); Hive stores data in key-value pairs.
QUESTION
I am developing a Quotes app as a beginner in flutter.I have multiple page in my app.Right now i want to create an icon button which will perform as a bookmark(Mark as fabourite) for the user.So i added the flutter fabourite button in my app.Initially it stays white and when i touch it ,it becomes red,which i wants.But when i move to another page and get back to the previous one(Where the fabourite icon was added) the button become white...I want it to stay red unles the user touch it again.I just want it to be used as an marked as fabourite icon...What can i do now?
...ANSWER
Answered 2021-Oct-06 at 16:44The issue is that you are not storing the state of the _isFavorite anywhere, that's what we use StatefulWidget for, is to keep track of state (and changes to it)
At the start of your class, declare a bool to track this value in:
QUESTION
I am deeveloping a Quotes app as a beginner in flutter.So i was using image and text both to make those Quotes aesthetically more appealing.Right now i want to add a simple Number in the bottom left corner of my app.Its for showing the user which page they are Right now,whatever i was doing it was showing me error.Kindly help if possible.[Here p1(),p2() etc are the some of the page i created]
...ANSWER
Answered 2021-Oct-05 at 07:04Wrap The Widget in Align widget
QUESTION
I have a Julia program which runs some montecarlo simulations. To do this, I set a seed before calling the function that generates my random values. This function can be called from different parts of my program, and the problem is that I am not generating same random values if I call the function from different parts of my program.
My question is: In order to obtain the same reproducible results, do I have to call this function always from the same part of the program? Maybe this questions is more computer science related than language programming itself.
I thought of seeding inside the function with an increasing index but I still do not get same results.
...ANSWER
Answered 2021-Sep-24 at 07:29it is easier to have randomness according to which are your needs if you pass to your function a RNG (random number generator) object as parameter.
For example:
QUESTION
Im developing a quotes app as a beginner in flutter.I had used a stack widget to use both image and text in the center of my screen.And added "pageview widget" to have multiple page in my app.But the problem im facing is,whenever im trying to swipe the page,image get swiped but the text stayed the same.I mean the fist page "Text", still showing in the middle of 2nd page.Moreover i cant drag to the next page while touching the letter,its only being done via touching above or under the letter.I just wants to have a simple multipage app with text and image. How can i solve this Problem?
...ANSWER
Answered 2021-Sep-17 at 13:02Try putting Stack inside PageView children.
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Install montecarlo
You can use montecarlo like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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