accumulate

问题 I have implemented a list of all prime numbers from a set amount. What I'm trying to do is hard to explain so I'll just show it with some hard code: euclst = [] euclst.append((primelst[0]) + 1) euclst.append((primelst[0] * primelst[1]) + 1) euclst.append((primelst[0] * primelst[1] * primelst[2]) + 1) .... So essentially I'm trying to take a single element in order from my prev list and multiplying it exponentially I guess and appending it to my other list. I realized that I could just do this

问题 This is really confusing me, I would appreciate if anyone could help me out. (EDIT: thought it was a templated problem, I was mistaken with this) I want to add multiple copies of the following class with gnu's parallelised accumulate algorithm (stored in #include <parallel/numeric> ) The class deliberately doesn't do much, I don't think this is a thread collision problem? template<class T> class NaturalParameters { public: typedef typename std::vector<T>::iterator iterator; NaturalParameters(

问题 Could someone please help me with this accumulate function accumulate ($sum: Repetition(objectId == getEventKey(), "VERY_LONG".equals(getRepType())); $count: count($sum); $count== $vlongCount) though the $count=10 and vlongcount=11 accumulate is still happening. is there any bug associted with accumulate function in Drools 回答1: $count:Number(intValue == $vlongCount) from accumulate(Repetition($sum: objectId == getEventKey(), "VERY_LONG".equals(getRepType())),$count: count($sum)) 来源： https:/

问题 I have a multimap defined by typedef std::pair<int, int> comp_buf_pair; //pair<comp_t, dij> typedef std::pair<int, comp_buf_pair> node_buf_pair; typedef std::multimap<int, comp_buf_pair> buf_map; //key=PE, value = pair<comp_t, dij> typedef buf_map::iterator It_buf; int summ (int x, int y) {return x+y;} int total_buf_size = 0; std::cout << "\nUpdated buffer values" << std::endl; for(It_buf it = bufsz_map.begin(); it!= bufsz_map.end(); ++it) { comp_buf_pair it1 = it->second; // max buffer size

问题 In a previous post column vector with row means -- with std::accumulate? I asked if it was possible, using STL functionality, to compute row means of a matrix vector< vector<double> > data ( rows, vector<double> ( columns ) ); The top answer by @benjaminlindley is not only just what I was looking for, it is a thing of beauty. Forever hopeful I thought it would be as easy to compute column means, so an STL equivalent of vector<double> colmeans( data[0].size() ); for ( int i=0; i<data.size(); i

问题 In an effort to be as lazy as possible I read in a matrix as vector< vector<double> > data ( rows, vector<double> ( columns ) ); and try to use as many STL goodies as I can. One thing I need to do next is to compute the row means. In C-style programming that would be vector<double> rowmeans( data.size() ); for ( int i=0; i<data.size(); i++ ) for ( int j=0; j<data[i].size(); j++ ) rowmeans[i] += data[i][j]/data[i].size(); In In C++, how to compute the mean of a vector of integers using a

问题 I was trying to use the accumulate function for vectors vector <double> A; double B = 0; A.reserve(100); for(itr = 0; itr < 210; itr++) { term1 = pow(r[itr], 12); term1 = 1/term1; term2 = pow(r[itr], 6); term2 = 2/term2; A.push_back(term1 - term2); } B = accumulate(A.begin(), A.end(), 0); however, I always got B = 0, while A had nonzero values 回答1: std::accumulate is a bit sneaky in the sense that the type of the result is the type of the initial value, and not the type of the container

问题 Say I have a simple input XML document like: <Amounts> <item> <Base>4750</Base> <Tax1>2800</Tax1> <Tax2>50</Tax2> </item> <item> <Base>4750</Base> <Tax1>2800</Tax1> <Tax2>50</Tax2> </item> </Amounts> And an XSLT as: <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output version="1.0" method="xml" omit-xml-declaration="yes" indent="yes"/> <xsl:template match="/"> <xsl:element name="MyTax"> <xsl:variable name="bf" select="sum(//item/Base)"/> <xsl:variable

问题 Edit: added some error checking code and found error '1282' is being thrown when I do glAccum(..) Edit2: I've tried the exact same code on a different computer, it works perfectly there. Edit3: 'Solution' ATI HD4xxx and up cards dont support accumulation buffers anymore :*( So it doesn't work on Windows 7 64bit with a HD4850 and up-to-date drivers It does work on Windows 7 32bit with an Intel series 4 IGP. (GL_ACCUM_RED_BITS = 16). I also tried it really really quick on a Linux based machine

问题 I have collection PurchaseOrder and nested array PurchaseOrderLines , in the PurchaseOrderLines I have two fields ReceivingQty and SendingQty . I want to calculate inventory trending(Group => ProductID , Date , TotalReceivingQty - TotalSendingQty ) Result should be something like this: ProductID | TotalQty | SeqTotal | Date 1 | 5 | 5 | 01-01 1 | -2 | (5-2)=3 | 01-02 1 | 10 | (3+10)=13| 01-03 1 | -5 | (13-5)=8 | 01-04 I've done this: db.PurchaseOrder.aggregate( [ { "$unwind":"