max

问题 Weird behavior (bug??) in numpy. Contrary to the docs, the following code gives a RuntimeWarning: invalid value encountered in fmax a = np.random.uniform(0.1, 0.4, (5, 5)) b = np.random.uniform(0, 3.5, (5, 5)) b[0, 0] = np.nan c = np.fmax(a, b) # Same problem with c = np.maximum(a, b) I'm stuck as I need these NaNs in my arrays and now my functions stop in iPython with this damn warning (ok, they really don't stop but it's rather annoying) EDIT : numpy 1.6.1 ipython 0.13.1 回答1: I get the same

问题 I'm trying to combine the GROUP BY function with a MAX in oracle. I read a lot of docs around, try to figure out how to format my request by Oracle always returns: ORA-00979: "not a group by expression" Here is my request: SELECT A.T_ID, B.T, MAX(A.V) FROM bdd.LOG A, bdd.T_B B WHERE B.T_ID = A.T_ID GROUP BY A.T_ID HAVING MAX(A.V) < '1.00'; Any tips ? EDIT It seems to got some tricky part with the datatype of my fields. T_ID is VARCHAR2 A.V is VARCHAR2 B.T is CLOB 回答1: I'm very familiar with

问题 I compiled this code at home on my mac w/ xcode and there was no provblem. I compile it at school with g++ on linux and I get these errors: :‘numeric_limits’ is not a member of std :expected primary-expression before ‘>’ token :no matching function for call to ‘max()’ #include <iostream> #include <cstdlib> using namespace std; int GetIntegerInput(int lower, int upper) { int integer = -1; do { cin >> integer; cin.clear(); cin.ignore(std::numeric_limits<streamsize>::max(), '\n'); //errors here

问题 My question is related to this other discussion. I'm trying to implement that algorithm using the dynamic program into a recursive call. Problem statement: Job j starts at sj , finishes at fj ,and has weight or value vj . Two jobs compatible if they don't overlap. Goal: find maximum weight subset of mutually compatible jobs. The solution proposed by books is to use a solution table to store all suproblems which will be reused when needed during a recursive o iterative call. The steps to solve

问题 (This is a related question, but there are difference with my case that makes me doubt my understanding of it). I have this class: class MyOwnClass { public: int score; Specialcustomtype val1; double index; private: }; and a vector of MyOwnClass vector<MyOwnClass> MySuperVector(20); Having some code that set values to the fields of MyOwnClass, I want to find which MyOwnClass in the vector has the field score with the highest value. In an answer from the related questions : #include <algorithm

问题 This can be a really simple question. I am using Spark 1.6 with scala var DF=hivecontext.sql("select name from myTable") val name_max_len =DF.agg(max(length($"name"))) // did not work println(name_max_len) How can I get max length? 回答1: You should collect result: import org.apache.spark.sql.functions.max val df = Seq("foo", "bar", "foobar").toDF("name") df.agg(max(length($"name"))).as[Int].first // res0: Int = 6 来源： https://stackoverflow.com/questions/41270204/how-to-get-max-length-of-string

问题 This can be a really simple question. I am using Spark 1.6 with scala var DF=hivecontext.sql("select name from myTable") val name_max_len =DF.agg(max(length($"name"))) // did not work println(name_max_len) How can I get max length? 回答1: You should collect result: import org.apache.spark.sql.functions.max val df = Seq("foo", "bar", "foobar").toDF("name") df.agg(max(length($"name"))).as[Int].first // res0: Int = 6 来源： https://stackoverflow.com/questions/41270204/how-to-get-max-length-of-string

问题 So I am running a PHP script on my godaddy (don't hate me) virtual server which I am expecting to take around 5 minutes to finish executing. The script is CURLing pages but never holds more than 1 page at a time (it is done in a loop reusing the same variable). I modified my php5.ini file to the following: max_execution_time = 600 max_input_time = 120 memory_limit = 64M I verified through phpinfo that the ini file changes had taken effect, however I am getting an Apache 500 error after 120

问题 Using C# and Linq how would i return the List<....> with the largest size / count? 回答1: It sounds as if you have n Lists, and you wish to single out the one with the largest count. Try this: List<int> ints1 = new List<int> { 10, 20, 30 }; List<int> ints2 = new List<int> { 1, 2, 3, 4 }; List<int> ints3 = new List<int> { 100, 200 }; var listWithMost = (new List<List<int>> { ints1, ints2, ints3 }) .OrderByDescending(x => x.Count()) .Take(1); You now have the List with the most number of elements

问题 Using C# and Linq how would i return the List<....> with the largest size / count? 回答1: It sounds as if you have n Lists, and you wish to single out the one with the largest count. Try this: List<int> ints1 = new List<int> { 10, 20, 30 }; List<int> ints2 = new List<int> { 1, 2, 3, 4 }; List<int> ints3 = new List<int> { 100, 200 }; var listWithMost = (new List<List<int>> { ints1, ints2, ints3 }) .OrderByDescending(x => x.Count()) .Take(1); You now have the List with the most number of elements