minimum

问题 I've got this matrix: a <- matrix(rnorm(1000 * 18, mean = 100, sd = sqrt(10)), 1000, 18) I would like to find the maximum and minimum value of every column and the maximum and minimum value of every row. 回答1: Figured it out. Minimum and maximum of every column: apply(a,2,min) apply(a,2,max) Minimum and maximum of every row: apply(a,1,min) apply(a,1,max) Found the information here http://www.personality-project.org/r/r.commands.html 回答2: See the matrixStats package. You can use colMins() ,

问题 I've got this matrix: a <- matrix(rnorm(1000 * 18, mean = 100, sd = sqrt(10)), 1000, 18) I would like to find the maximum and minimum value of every column and the maximum and minimum value of every row. 回答1: Figured it out. Minimum and maximum of every column: apply(a,2,min) apply(a,2,max) Minimum and maximum of every row: apply(a,1,min) apply(a,1,max) Found the information here http://www.personality-project.org/r/r.commands.html 回答2: See the matrixStats package. You can use colMins() ,

问题 I trying to get the minimum values from the any column contains "xx" in the column name. Below is my code: <?php $array = array( array( 'id' => 1, '10xx' => 14, '11xx' => 32, '12xx' => 4 ), array( 'id' => 2, '10xx' => 13, '11xx' => 36, '12xx' => 41 ) ); foreach($array as $item) { $lowestKey = ''; foreach($item as $key => $value) { if(strpos($key, 'xx') === 0) { if($lowestKey == '') { $lowestKey = $key; } else { if($value < $item[$lowestKey]) { $lowestKey = $key; } } } } echo 'lowest for id '

问题 I am working on a problem in Javascript. Finding common minimum value between two arrays. However, I have been told that this might not work on some values. What is the issue? function cmp(a, b) { return a - b; } function findMinimum(A, B) { var n = A.length; var m = B.length; A.sort(cmp); B.sort(cmp); var i = 0; for (var k = 0; k < n; k++) { if (i < m - 1 && B[i] < A[k]) i += 1; if (A[k] == B[i]) return A[k]; } return -1; } 回答1: Let's take, A = [ 1, 3, 5, 7] B = [ 0, 0, 1, 4, 6] and run

问题 I will preface this by saying it is homework. I am just looking for some pointers. I have been racking my brain with this one, and for the life of me i am just not getting it. We are asked to find the minimum element in a list. I know i need a sublist in here, but after that i am not sure. any pointers would be great. thanks. /** Find the minimum element in a list. * * @param t a list of integers * * @return the minimum element in the list */ public static int min(List<Integer> t) { if (t

问题 I have an array in this format: Array ( [0] => Array ( [id] => 117 [name] => Networking [count] => 16 ) [1] => Array ( [id] => 188 [name] => FTP [count] => 23 ) [2] => Array ( [id] => 189 [name] => Internet [count] => 48 ) ) Is there a good way to retrieve the minimum and maximum values of 'count'? I could do this using a few loops but I thought there may be a better way. 回答1: In contrast to what others have posted, you cannot use the min()/max() functions for this problem as these functions

问题 My site displays just like in need in IE and Opera, but in Firefox I can't get (via CSS) to have font sizes smaller than Firefox' default minimum-font-size. Of course I can go to Tools>Options and remove this value, but other users will see some of the elements displaced. I have tried using !important, but it doesn't work. And I can't substitute the text by images, they are dynamic fields. 回答1: Okay. I'm going to explain how you do this, but you need to know a few things first. 1. You shouldn

问题 in short: How to find min value in a list? (thanks for the advise kaarel) long story: I have created a weighted graph in amzi prolog and given 2 nodes, I am able to retrieve a list of paths. However, I need to find the minimum value in this path but am unable to traverse the list to do this. May I please seek your advise on how to determine the minimum value in the list? my code currently looks like this: arc(1,2). arc(2,3). arc(3,4). arc(3,5). arc(3,6). arc(2,5). arc(5,6). arc(2,6). path(X,Z

问题 I have a map and I want to find the minimum value (right-hand side) in the map. Here is how I did it: bool compare(std::pair<std::string ,int> i, pair<std::string, int> j) { return i.second < j.second; } //////////////////////////////////////////////////// std::map<std::string, int> mymap; mymap["key1"] = 50; mymap["key2"] = 20; mymap["key3"] = 100; std::pair<char, int> min = *min_element(mymap.begin(), mymap.end(), compare); std::cout << "min " << min.second<< " " << std::endl; The code

问题 How can I know the (row, column) index of the minimum of a numpy array/matrix? For example, if A = array([[1, 2], [3, 0]]) , I want to get (1, 1) Thanks! 回答1: Use unravel_index: numpy.unravel_index(A.argmin(), A.shape) 回答2: [Corrected typo] Another simple solution is ri, ci = A.argmin()//A.shape[1], A.argmin()%A.shape[1] As numpy.argmin returns the index reading in row-major order Yes, you are right, it was a typo, which worked for square matrix 来源： https://stackoverflow.com/questions/3230067