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Showing content with the highest reputation on 08/14/2020 in all areas
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I assumed that they knew how to calculate the distance and just needed some pointers on how to structure the algorithm in PHP.1 point
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Based on this page, the Euclidean distance function requires 2 points (p1, p2) so a function to calculate it would be something like this: function EuclideanDistance($p1x, $p1y, $p2x, $p2y) { return sqrt(pow($p1x - $p2x, 2) + pow($p1y - $p2y, 2)); }1 point
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1 and 2 would presumably be input from the web page. The rest would be something like: for ($m=1; $m<=$M; $m++) { for ($l=1; $l<=$L; $l++) { for ($j=1; $j<=$N; $j++) { #do calculation here storing it in a 2D array } # select minimum here (perhaps min() function) } } # use array sort # use PHP vector class # compute distance from vectors # echo results in desired format1 point
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Either you should not be GROUPing BY the confno, or you should not be GROUPing BY and instead be searching only for a particular confno, or you should be including more data in the form so it's obvious that those three boxes are for three different confno values.1 point
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