shoelace | Neural Learning to Rank using Chainer | Machine Learning library
kandi X-RAY | shoelace Summary
kandi X-RAY | shoelace Summary
:warning: This library has been deprecated and archived in favor of Shoelace is a neural Learning to Rank library using Chainer. The goal is to make it easy to do offline learning to rank experiments on annotated learning to rank data.
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shoelace Key Features
shoelace Examples and Code Snippets
Lines of Code : 2License : Strong Copyleft (CC BY-SA 4.0)
Copyx, y = np.array(testCoords).transpose() # Often, `.transpose()` is abbreviated as `.T`
def centroid(points):
if len(points) < 3:
raise ValueError('At least 3 points are required')
# https://en.wikipedia.org/wiki/Centroid#Of_a_polygon
# https://en.wikipedia.org/wiki/Shoelace_formula
# computation usdouble[][] coords = {{-0.708, 0.707, 0.309, -0.951, 0.587, -0.809},
{1, 0, 0, 1, -1, 0, 0, -1, 0.708, -0.708}};
double areaSum = 0;
List pts = new ArrayList<>();
for(int p=0; p poly = new ArrayList<>();
def getCorners(points):
maxPoint = np.max(points[:,0])
mayPoint = np.max(points[:,1])
minPoint = np.min(points[:,0])
miyPoint = np.min(points[:,1])
meanPoint = np.array([(maxPoint + minPoint)/2, (mayPoint + miyPoint)/2]shift_left <- function(x)c(x[-1],x[1])
shift_right <- function(x)c(x[length(x)],x[-length(x)])
a <- c(2, 3, 1, 2)
b <- c(4, -8, 2, 4)
1/2 * abs(sum(a * (shift_left(b) - shift_right(b))))
# [1] 7
Community Discussions
Trending Discussions on shoelace
QUESTION
I've been making a program in C++ that calculates the surface area of a polygon with a shoelace method. I've already checked in the main code and that part works fine. The problem appears when I try to put that same code into a class. This is the code for a header file:
...ANSWER
Answered 2021-Mar-31 at 19:11You are missing a semicolon at the end of the class definition.
This will trigger the error
QUESTION
I use styled-components each component from styled-components I pass in other components, in order to apply them, the problem is that my code looks ugly because every component style I pass in other components it looks like this
SideBarStyledComponents.js
...ANSWER
Answered 2021-Mar-17 at 09:51You should define all the styled components outside in a separate file (or multiple files). And then you should import those styled components directly within your component where you are going to use it.
Passing them as props is a bad practice.
For example you can create a file called 'StyledComponents.js' and export all your styled components.
QUESTION
I want to use a sidebar when following links using React Route but when I refresh the page the content disappears
Lesson.jsx
...ANSWER
Answered 2021-Jan-17 at 14:33I think its conditional rendering problems. Its works as asynchronously
QUESTION
I am using the select Shoelace-element for as agreement checkbox and need to check if it is checked or not. Chrome DevTools shows me the added class "switch--checked" to the label when the switch is checked. It is removed when unchecked.
I need to fire some events when the switch is checked and tried the jQuery hasClass function to do so. I have tried several classes next to the one below. None of it made my event trigger. Please help!
...ANSWER
Answered 2020-Aug-18 at 16:49If you get a reference to the element instance you will be able to read the checked property directly, as well as attach an event listener to get notified when the checked property changes:
QUESTION
I have a rather complicated problem. Suppose I have the shape below. You can think of the red dot as a person and the pointy shape inside the big polygon as an obstacle. My goal is to compute the total unblocked vision of the person inside the big polygon, which is the area of the polygon minus the red shaded area.
I want to write a function that takes in the coordinates of the person, the coordinates of the ordered vertices of the obstacle(s) and those of the ordered vertices of the big polygon, and returns the area of the unblocked vision.
I have tried multiple things, and I'm aware of the shoelace algorithm, but the only way that I can come up with is through monte carlo. Can I get a hint on a more intelligent and efficient way to compute the area in a closed-form way?
...ANSWER
Answered 2020-May-21 at 17:03The first task is to get the two extreme lines of sight from the person.
A simple brute-force checking. I doubt there's a better method, unless you need this calculation at each frame. (See (a) below).
Calculate the angle (relative to X-axis, or whatever) of the line person-to-obstacle_vertex for every vertex.
Find the lowest and highest values. This can be tricky if the obstacle may somehow warp around the person.
So yo can calculate the angle of each pair of sight lines (combinatory issue), an get that with maximum angle. For this job use the Dot-Product.
The second task is to get the area of the shaded region.
You need to get the two intersections of the sight lines and the outer polygon. And then build a list of vertices of the polygon between the two intersections. Add these intersections to that list.
The area can be calculated as the sum of area of triangles, those from the person to each edge (two points in that list). While you have all coordinates, an easier way is to use the Shoelace Algorithm.
(a) If the obstacle has thousands of vertices and the person moves continuosly I'd try to reduce the number of pairs to check. You can mantain a list of shown/hidden vertices, and when the person moves check the last two used vertices and their neighbours, until you get a new couple of ending vertices.
QUESTION
I have a question regarding the edges of an orthogonal polygon. My goal is to decide whether an edge is a top edge (this means the interior of the polygon lies below), a bottom edge (this means the interior of the polygon lies above), a right edge (interior of the polygon is left) or a left edge (interior of the polygon is right).
I have the coordinates of the polygon and sorted them counterclockwise (as this is the usual recommended way).
I wrote some code to calculate the interior of the polygon in Java.
[...]
...ANSWER
Answered 2020-Apr-05 at 15:51If I've understood your question correctly (a diagram would help) you can get the position (TOP, BOTTOM, LEFT, RIGHT) of each edge relative to a simple (no self-intersections), orthogonal polygon by comparing the ordering of the x (for horizontal) or y (for vertical) coordinates.
Obviously the ordering of the points matters, so for a counter-clockwise polygon you could use something like this:
QUESTION
I am new to flask-alchemy. I want to filter a SQL query on the values of a LOC_CODE column. I made db.session.query(schools).filter_by(LOC_CODE='X270').first(). But the compiler returns:
ANSWER
Answered 2019-Dec-23 at 06:37I was able to get past your first error by running these commands from the python console first, then starting up the flask application. This creates the database that is used by your code in the given example. If you have an existing database you will need to change the URI to where it is at. The URI you are using is the one that will be created by using this command. I would look over the Flask-SQLAlchemy documentation to see how to connect to an existing database if desired.
QUESTION
I am in the process of transforming a traditional loop to a foreach loop for solving the shoelace formula problem in R; however, I am not getting the right accumulation with the foreach loop.
ANSWER
Answered 2019-Oct-19 at 06:15foreach is returning the last calculated expression, as in regular functions.
So, you can do:
QUESTION
Suppose I know 700 different values of x as well as another 700 different values of y coordinates. Every 7 points from my coordinates can construct a polygon. I can easily pick any formula (here I have used shoelace formula) to calculate the area of any polygon. But it's really tough to calculate area of each polygon in this way, is there any good way by which I can calculate the area of all polygon (for this case the total number of polygon is 100) at a time, e.g. by using any iteration.
A simple code is shown below:
...ANSWER
Answered 2019-Aug-15 at 10:46Here's a vectorized way to get polygon areas for all -
QUESTION
I am new to react, I am got stuck with the use of react router links, I don't know what I am doing wrong, hopefully I might get answer here.
I have developed screen, which has a appbar and a drawer which open on click of an icon present in the appbar. this part is working fine. On drawer, I have three links, on click of each link, I want to load other screen on right side of drawer menu. I tried to do it by using react routes here but I got stuck with issues like: You should not use Link outside a Router - Stack Overflow,
I tried to understand answers mentioned for below issue on stackoverflow but was not able to get it correctly. Can you help me how can I use link in ListItems
Below is my code:
index.js
...ANSWER
Answered 2019-Jan-28 at 19:08In MainComponent you are rendering DrawerMenu outside of your Router. You are enclosing your routes in the Router tag, but all react-router Link elements must also be within a router. DrawerMenu uses Link -- thus the error.
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Install shoelace
You can use shoelace 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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