![]() ![]() The angle AOB formed by A (Shanghai), O (Center of Earth), and B (New York) in the figure below (borrowed from: link, just to give an idea ) is acos(-0.28) = 1.86 radians, or in degrees: 1.86/3.14*180 = 106.6 °. = -0.28 -> this output is a value from -1 to 1 The sin and cos functions take latitudes and longitudes input in radians in most softwares. ![]() The distance in kilometers is calculated using the Spherical Law of Cosines :ĭ = acos( sin(lat1)*sin(lat2) + cos(lat1)* cos (lat2)* cos (long2-long1) ) * 6371 (km) bbnam.bf: Estimate Bayes Factors for the bbnam.ībnam: Butts' (Hierarchical) Bayesian Network Accuracy Model.As well as how the distances between geological points were calculated Calculating the distance between two points on the earth is fundamental to calculate all the measurements mentioned in earlier posts.betweenness: Compute the Betweenness Centrality Scores of Network.bicomponent.dist: Calculate the Bicomponents of a Graph.blockmodel: Generate Blockmodels Based on Partitions of Network Positions.blockmodel.expand: Generate a Graph (or Stack) from a Given Blockmodel Using.bonpow: Find Bonacich Power Centrality Scores of Network Positions. stepgeodist creates a specification of a recipe step that will calculate the distance between points on a map to a reference location.brokerage: Perform a Gould-Fernandez Brokerage Analysis.centralgraph: Find the Central Graph of a Labeled Graph Stack.centralization: Find the Centralization of a Given Network, for Some Measure.This interface is provided for cases where computational efficiency is important, and will generally provide faster results than the main function. clique.census: Compute Cycle Census Information. An alternative interface to the main geodist function that directly accepts inputs as individual vectors of coordinates, rather than the matrix or ame inputs of the main function.closeness: Compute the Closeness Centrality Scores of Network Positions.coleman: Coleman's High School Friendship Data.component.dist: Calculate the Component Size Distribution of a Graph.components: Find the Number of (Maximal) Components Within a Given Graph.connectedness: Compute Graph Connectedness Scores.consensus: Estimate a Consensus Structure from Multiple Observations.cugtest: Perform Conditional Uniform Graph (CUG) Hypothesis Tests for.cug.test: Univariate Conditional Uniform Graph Tests.This R-package allows the calculation of distances that are contrained by frontiers, islands, mountains, Distances are calculated from a raster grid of the area. cutpoints: Identify the Cutpoints of a Graph or Digraph. GeoDist: Constrained distance calculation and associated geotools.degree: Compute the Degree Centrality Scores of Network Positions. ![]() diag.remove: Remove the Diagonals of Adjacency Matrices in a Graph Stack.dyad.census: Compute a Holland and Leinhardt MAN Dyad Census.efficiency: Compute Graph Efficiency Scores.ego.extract: Extract Egocentric Networks from Complete Network Data.equiv.clust: Find Clusters of Positions Based on an Equivalence Relation.eval.edgeperturbation: Compute the Effects of Single-Edge Perturbations on.evcent: Find Eigenvector Centrality Scores of Network Positions.event2dichot: Convert an Observed Event Matrix to a Dichotomous matrix.flowbet: Calculate Flow Betweenness Scores of Network Positions.Gplot3d: Three-Dimensional Visualization of Graphs.gplot: Two-Dimensional Visualization of Graphs.gliop: Return a Binary Operation on GLI Values Computed on Two.gilschmidt: Compute the Gil-Schmidt Power Index.geodist: Fund the Numbers and Lengths of Geodesics Among Nodes in a.otstats: Plot Various Graph Statistics Over a Network MDS.otdiff: Plot Differences in Graph-level Statistics Against.gcov: Find the Covariance(s) Between Two or More Labeled Graphs.gcor: Find the (Product-Moment) Correlation Between Two or : Get Central Graphs Associated with Graph : Plot Statistics Associated with Graph Clusters.gapply: Apply Functions Over Vertex Neighborhoods.
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