intersection

问题 I have a scatterplot of experimentally obtained values and a line x=y, I wish to locate all points of intersection between the trend line and x=y, is there a method/function for doing so? There is no equation which approximates the trend line well enough to solve algebraically. Thank you for your help. 回答1: I feel deleting the only answer is a bit of a poor move, code from the workbook although although I feel the actual sheet explains it better. Code is from here: http://andypope.info/charts

问题 I get a full ellipse not the intersection between the two. What is wrong? <Canvas x:Name="mainCnavs"> <Ellipse x:Name="ellipse" Width="100" Height="50" Canvas.Top="100" Canvas.Left="300" Fill="Transparent" Stroke="Red" StrokeThickness="3"/> <Ellipse x:Name="ellipse1" Width="100" Height="50" Canvas.Top="100" Canvas.Left="250" Fill="Transparent" Stroke="Red" StrokeThickness="3"/> </Canvas> public partial class MainWindow : Window { CombinedGeometry g; Path p; public MainWindow() {

问题 I've made the same question elsewhere. Now I bring the data so you may try to reproduce the error. I just wanna see how much of a small area was deforested up to 1997. Small area is in setoresp.zip. Deforestation is in d97.zip. The files are here. Unzip them to the working directory, along with the code: # This script reads sectors of investigated cities and calculates the # deforestated area (up to 1997) for the first sector library(rgdal) library(rgeos) library(raster) setp <- readOGR(".",

问题 Suppose I am having the following paired-typed lists. I want to calculate the intersection of these lists to generate only the common words not the numbers . The lists are l1 = [('state', 3537), ('t', 2320), ('system', 2086), ('transition', 1882), ('φ', 1703), ('path', 1423), ('ϕ', 1310), ('formula', 1273), ('property', 1194), ('π', 1165), ('α', 1065), ('ctl', 1048), ('action', 1034), ('ψ', 881), ('finite', 845), ('model', 828), ('algorithm', 790), ('process', 734), ('checking', 701), (

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . Are multiple conditions, as in multiple if else statements needed for the intersection rectangles to be printed correctly? Step 3: Two rectangles intersect if they have an area in common Two rectangles do not overlap if they just touch （common edge, or common corner） Two rectangles intersect(as specified above

问题 Currently I am looking for an efficient algorithm to compute the intersection of two triangle meshes. I have searched over the internet, but haven't found valuable materials. The book Real-Time Collision Detection is a helpful book but is too complex for my task. I also found the post:Triangle to triangle collision detection in 3D. However I hope to find a detailed description about the algorithm. Regards Jogging 回答1: Well it depends on meshes size, testing each triangle in each mesh against

问题 I am having trouble using my custom set,MySet, using the basic function of union and intersecting. The program compiles without error but just returns an empty set. Anybody see where the problem is? public class MySet<E> extends TreeSet<E> { Set<E> set; public MySet(){ set = null; } public MySet(Set<E> set){ this.set = set; } public void union(Set<E> s){ set.addAll(s); } public void intersection(Set<E> s){ set.retainAll(s); } } Main method public class TestSet { public static void main(String

问题 I’m using Solr 4.3.0 with an up to date version of JTS and spatial4j. As field type in my schema.xml i’m using “location_rpt” like the description in the documentation. Documentation <field name="standort" type="location_rpt" indexed="true" stored="true" /> Now when my Application create a FilterQuery like this standort:"IsWithin (POLYGON((16.243972778320312 48.27016879304729, 16.411170959472656 48.268340583150504, 16.44275665283203 48.19058119922813, 16.32396697998047 48.15921534239267,16

问题 Does anyone have any C# algorithm for finding the point of intersection of the three planes (each plane is defined by three points: (x1,y1,z1) , (x2,y2,z2) , (x3,y3,z3) for each plane different). The plane defined by the equation: ax + by + cz + d = 0 , where: A = y1 (z2 - z3) + y2 (z3 - z1) + y3 (z1 - z2) B = z1 (x2 - x3) + z2 (x3 - x1) + z3 (x1 - x2) C = x1 (y2 - y3) + x2 (y3 - y1) + x3 (y1 - y2) D = -(x1 (y2 z3 - y3 z2) + x2 (y3 z1 - y1 z3) + x3 (y1 z2 - y2 z1)) Thank you very much! 回答1:

问题 In an application I am developing I have a number of lines represented by Latitude and Longitude values. I want to check if another line intersects any of these lines at any point. Say I have the line A-B I want to know if it intersects the line C-D at any point. The first and second examples above would lead to no intersection whereas the third example would. For my scenario the actual intersection point is not necassary for the application to function, so a simple yes/no to the intersection