distance

问题 I want to calculate the driving distance between two locations [the user's specified locations], before user starts the driving. I used many formulas and getDistanceFrom in CLLocation also, but I am not able to get the perfect the driving distance between those locations. There is much difference in actual and calculated distance. Please help me to calculate the driving distance between two locations. How can I use Google Maps API to calculate the driving distance ? I have already use the

问题 I have many points and I want to build distance matrix i.e. distance of every point with all of other points but I want to don't use from loop because take too time... Is a better way for building this matrix? this is my loop: for a setl with size: 10000x3 this method take a lot of my time :( for i=1:size(setl,1) for j=1:size(setl,1) dist = sqrt((xl(i)-xl(j))^2+(yl(i)-yl(j))^2+... (zl(i)-zl(j))^2); distanceMatrix(i,j) = dist; end end 回答1: How about using some linear algebra? The distance of

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 4 years ago . How to calculate the driving distance ? I'm unable to find a working example, can anybody help me ? Thank you. EDIT: More info: I have two text inputs to type the cities. On change I just want to display/update the distance in another div. 回答1: What you want is the Distance Matrix API. That is, if you are really

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 4 years ago . How to calculate the driving distance ? I'm unable to find a working example, can anybody help me ? Thank you. EDIT: More info: I have two text inputs to type the cities. On change I just want to display/update the distance in another div. 回答1: What you want is the Distance Matrix API. That is, if you are really

问题 I got a distance matrix with the following steps: x <- read.table(textConnection(' t0 t1 t2 aaa 0 1 0 bbb 1 0 1 ccc 1 1 1 ddd 1 1 0 ' ), header=TRUE) As such x is a data frame with column and row headers t0 t1 t2 aaa 0 1 0 bbb 1 0 1 ccc 1 1 1 ddd 1 1 0 require(vegan) d <- vegdist(x, method="jaccard") The distance matrix d is obtained as follows: aaa bbb ccc bbb 1.0000000 ccc 0.6666667 0.3333333 ddd 0.5000000 0.6666667 0.3333333 By typing str(d), I found it is not a ordinary table nor csv

问题 I'm building an application based around finding a "convenient meeting point" given a set of locations. Currently I'm defining "convenient" as "minimising the total travel distance". This is a different problem from finding the centroid as illustrated by the following example (using cartesian coordinates rather than latitude and longitude for convenience): A is at (0,0) B is at (0,0) C is at (0,12) The location of minimum total travel for these points is at (0,0) with total travel distance of

问题 Im looking for an algorithm to be used in a racing game Im making. The map/level/track is randomly generated so I need to find two locations, start and goal, that makes use of the most of the map. The algorithm is to work inside a two dimensional space From each point, one can only traverse to the next point in four directions; up, down, left, right Points can only be either blocked or nonblocked, only nonblocked points can be traversed Regarding the calculation of distance, it should not be

问题 I am trying to count the amount of elements read by std::cin by using std::distance for the constructor argument of a vector in advance, like so: // Gives correct amount, but now can't use to put into vector int size = std::distance(std::istream_iterator<std::string>(std::cin), std::istream_iterator<std::string>()); std::vector v(size); // Already read from stream std::copy(...); Obviously I can complete this in one step with std::copy , but that would require setting a size beforehand. My

问题 Can anyone please help. I just need a simple script. I have a form posted to another page. two formfields are: fromaddress and toaddress The only thing I need is a script that shows me the distance in km and the time it takes using google maps. I have found dozens of scripts but I cannot get it working. The map is already there with this code which seems to work perfect. <script type="text/javascript" src="//maps.googleapis.com/maps/api/js?key=AIzaSyDdDwV6_l5n2bS3gM6NBCla3RFLtIFc_HE&sensor

问题 I intend to find a distance metric between two colours in HSV space. Suppose that each colour element has 3 components: hue, saturation, and value. Hue is ranged between 0 to 360, saturation is ranged between 0 to 1, and value is ranged between 0 to 255. Also hue has a circular property, for example, 359 in hue is closer to 0 in hue value than 10 in hue. Can anyone provide a good metric to calculate the distance between 2 colour element in HSV space here? 回答1: First a short warning: Computing