115 Discussion / Question Topics
Remove Filter  | I'm having the following difficultly: I have a table `rates` which contains the follow: -> id -> rate_from -> rate_to -> price A `user` can have many rates, and for an example: between 0 - 10 hours the `user` charges `10.00` an hour between 10 - 100 hours the `user` …  |
| | Hi all, I think I might have missed something, I have been away for sometime. I was visiting the site and noticed that I had access to area 51. But I don't seem to recall having any of the privileges mentioned in the description. Is this an error or has …  |
| | Assume that I have a vector: x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14] What I need to do is split this vector into block sizes of `blocksize` with an `overlap` `blocksize = 4` `overlap = 2` The result, would be a …  |
| | Hey DaniWeb *Never fear, Phorce is here!* I've completely stopped getting emails from you guys when a watched article has been read. I've clicked "Watch article" and everything but still nothing.. Checked my spam folder, nothing. Anyone else facing this issue?  |
| | I don't know why I'm having such a problem with this, basically, I want to have a Queue that is constantly running during the program called "Worker" this then works, however, every 10 seconds or so.. Another method called "Process" comes in and processes the data. Let's assume the following, … |
| | I have two threads, and, I want one thread to run for 10 seconds, and then have this thread stop, whilst another thread executes and then the first thread starts up again; this process is repeated. So e.g. from threading import Thread import sys import time class Worker(Thread): Listened = …  |
| | Loading DaniWeb today was very slow.. Been like it most of the day and I have just been able to get on. mhm. Anyone else?  |
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| | I believe there is a function which returns the max value for a double, however, I do not need this. I'm converting the following function: public void StaticCompress(short[] samples, float param) { for (int i = 0; i < samples.Length; i++) { int sign = (samples[i] < 0) ? -1 …  |
| | I might be a bit tired, but why does the following not work? class Signal { public: Signal() { } protected: std::vector<double> data; }; class Something : public Signal { public: Something() { data.resize(100); } }; class Parser : public Signal { public: Parser() { std::cout << this->data.size(); } }; … |
| | I basically have two classes: `Signal` and `Parser` they both have differences, however, they each share the data that `Signal` has. I want to incorperate Method Chaining into the class, so my classes (at the moment look like the following): class Signal { Signal() { } Signal& Parse() { return … |
| | Earlier today I could not sign in and it told me my username + password combonation wasn't right. But, I had not changed it? It worked after I re-set my password. Nothing changed on my account, so I don't think I've been "Hacked" Any ideas? P.S. now I'm getting a …  |
| | I'm working on a project that generates roughly between 13x512 values in which I compare at run-time. So the program outflow will be sort of as follows: - Program executes - Extracts (1) 12x512 - Extracts (2) 12x512 - Compares (1) to (2) - Extract (3) - Compares (3) to …  |
| | I'm attempting to implement the Factory Pattern. I have a class called "Window" which has a class member function which determines which object is being called and then assigns the particular object pointer. I have written the following code: class Hamming { public: Hamming() { } Hamming(int theSize) { // …  |
| | This came across me the other day, and it got me thinking. Let's assume I have a very quick question, for example, I had one the other day: > How much implementation can you actually put inside a constructor? For me, personally, I did not want to make a post … |
| | Sorry if this is hard to understand what I'm trying to do here, but, I do not know how to approach this. I am using method overloading in my constructors of a class, and I have multiple "Window" functions which are all classes that can be used and I need … |
| | Hello, I am having a few problems when trying to execute the a Makefile that will *hopefully* create a static library that I can use for future use. Here is my code below: #----------------------------------------------------------------------------- # Usage of make file #----------------------------------------------------------------------------- # Clean operation: # make -f MakeClient clean # # … |
| | So basically, I'm working on a project that can require both arrays and vectors to be passed through in order to calculate the final outcome. Now, I'm using the constructor to calculate the values and I need to know whether or not it is possible to change the datatype of … |
| | I have not visited PHP/MYSQLI for some time now, and, need some guidance on the following problem: I'm trying to retrive all the data from the given week and just in that week. My table looks like the following: id int(11) type varchar(255) week datetime And as a test data … |
| | Hey guys! Just a quick question really: What happened to the spell check when you write in the forum posts? It seems to have gone for me D: even though I recieive the feature in other forums (no names) it's just annoying sometimes because I have to concentrate really hard … |
| | Hello, I have a question. I'm not sure I am using the right terms or anything here, but, I have seen people develop their "projects" (classes etc..) and then creating a .dll file (or .lib) and then importing the files when they need them. But I cannot seem to get … |
| | Hello, I don't want to look like I am following other forums, but, wouldn't it be a good idea for users (with a certain amount of rep) to have basic moderation tools, or, atleast the ability to edit posts by users and: 1) The person who posted can accept this … |
| | Hey, I have a function in C that I am trying to convert over to C++. I have done everything, apart from this line: memcpy(mel[i],&temp[melstart[i]],mellength[i]*sizeof(double)); I need a way of copying the elements in temp[melstart[i]] over to a vector of doubles.. Here is the C code: void Setup_Mel(int fft_size, int … |
| | Hello, So basically, I am trying to create a system based on the Singleton Pattern and I'm confused. If I have an Animal class, as well as a Cat class which is derived from Animal and then using a Singleton class will create a single object of which-ever class has …  |
| | Hey, I might be having a blonde moment but here goes.. I'm trying to split a massive 1D vector into blocks at different places (If that makes sense), it should basically go like this: 0 201 401 601 801 .. .. .., 57201 2 202 402 602 .. .. .. … |
| | Hello, having a weird problem and wondering if someone can help me.. Basically, I'm trying to read in a .wav file, and I have read in the header information and that's all fine, it's just the data.. Here is the code: bool Wav::readHeader(ifstream &file) { file.read(this->chunkId, 4); file.read(reinterpret_cast<char*>(&this->chunkSize), 4); file.read(this->format, … |
| | Hello, I'm just wondering whether or not, it is possible to get the vector Dimensions without them being set? Basically, I'm converting some matlab code and there's a function size(VECTOR) which get's the dimentions of the vector being passed. For example: #include <iostream> #include <vector> using namespace std; int main(int …  |
| | Hello, I'm trying to read the header information of a .wav file and I'm kind of stuck. Basically, the header information is located at different offsets in the file. So for example: (0-4) = ChunkID (4-8) = ChunkSize (8-12) = Format .. .. .. .. .. .. From this: https://ccrma.stanford.edu/courses/422/projects/WaveFormat/ …  |
| | Hello, wondering if someone can help me. I'm working with a .wav file, and, I need to collect the header information. The header contains (roughly, 20 bits/bytes) before the actual data. And, each of this data is contained at different locations in the file. I need to read a particular … |
| | Hello, I'm trying to write the Cooley Turkey algorithm for an FFT. Now, The algorithm works well, but, only for 2 numbers - Nothing else. For example, I have used an online FFT calculated, entered the same data and got the same results. Here is the code for the algorithm: … |
| | Hello, I'm wondering if anyone knows if there is a specific way or a library that allows me to read in an audio file in which I can then manipulate and get the different frequencies? I'm basically trying to make an application that uses an FFT for the audio signals …  |
| | Hello, wondering if someone can help me quickly.. Basically, I have created a array to store all the data in a text file. The pointer of the array is sent to a function, which then populates it. Here is the code: void Data(char* theData) { ifstream txtFile(inputFile.c_str()); if(!txtFile.is_open()) { cerr … |
| | Hello, I'm trying to develop an algorithm/program that calculates the distance between two points. These values are stored inside a 1D array, which, acts as a 2D array (I think you know what I mean!) The values are: 150 50 15 20 The calculation should therefore be: d = √(150 … |
| | Hello, I'm building an application in PHP and when outputting HTML tags, it shows the tags.. So for example: <?php echo "<b>Hello world</b>"; ?> I would expect Hello world to be in bold.. But no, I get: <b>Hello world</b> as the output Any ideas please? |
| | Hello, I'm having a weird problem with some PHP when outputting some HTML. For example: echo "<h1>There are errors!</h1>"; foreach($errors AS $error) { echo $error . '\n'; } exit(); I want the output to actually show the text in H1 style, however the output is like this: <h1>There are errors!</h1> …  |
| | Hello, I'm trying to convert some code from BASIC to C++.. But, I'm stuck on a particular part.. REM CREATE A MATRIX C WITH (COS(DN) , -SIN(DN)) : DIM C(NE, NS, 2) FOR N = 0 TO NE / 2 FOR E = 0 TO NE - 1 DC = … |
| | Hello, I'm currently working on a project that basically reads some text and then performs basic Lexical Analysis on the text. I'm having a slight problem with overloading methods. So for example, I have a method that can read in the words from a txt file and another method which … |
| | Hello, I'm looking for some advice (NOT CODING) on a project I'm hoping to start.. Basically, I'm hoping to develop some shell commands that work a tiny bit like Github (if you are familular with it).. The language that I want to use is C++.. Could anyone offer any advice …  |
| | Hello, I'm going to be working on Lexical Analysis, but, both in Words / Characters as well as Integer values. The application will also allow input from both Text files, as well as passing the data through arrays, or variables. The Numeric analysis will be different from the Lexical Analysis … |
| | Hello, I'm working on an image-gallery type application and I have got the images to work, in that the gallery works and the image changes at the particular interval. BUT, I need a way to stop the images changing when you mouse over the event. Here is what I have … |
| | Hello, Quick question.. I'm trying to get the mean of a matrix (vector) now before I created a function that did it but I thought that it isn't really an effective way of coding. I've been looking at the accumulate function online and wanted to ask if this would work: … |
| | Hello, I have this matrix: 0 0 1 0 0 0 1 0 1 1 1 0 0 1 0 0 and I need to print out the block with the coords: (2,1) so in this case: 1 0 1 0 I have tried this: for(int i=minRow; (i < 2); … |
| | Hello, I'm trying to determine where a small matrix would fit inside a big matrix.. But, the small matrix is not in the big matrix so I need to see how simular they are.. The one with the lowest value, is the best fit.. So my difference function is this: … |
| | This may sound really noobish, and I'm probably missing something really stupid.. But, I'm trying to calculate the differences between matrices, and the one with the smallest value (result) is the matching number.. But, for some reason my algorithm seems to be missing the smallest number and I can't figure …  |
| | Hello, I have been reading an article on comparing data, and have been given this code: for(i = 0; i < matrix1W; i++) { for(j = 0; j < matrix2H; j++) { diffSum += abs(matrix2->pData[(row+j)*backW+(col+i)] - marix1->pData[j*matrix2+i]); } } Now it works when using arrays, but, I'm using vectors, is … |
| | Hello, I have 2 vectors, and I'm trying to search/scan the first vector for the second vector. Let's say I have this vector/Matrix: M1 = 0 1 1 0 0 1 1 1 1 0 1 1 0 0 0 1 M2 = 0 1 0 1 Then I will … |
| | Hello, I'm having trouble with something.. I have a vector of doubles and I need to convert the vector to an unsigned char so then I can write the contents to a text file. I can do this when reading the data from a text file, just not from a …  |
| | Hello, I'm trying to split a matrix (512x512) into blocks of (16x16).. Now I have managed to complete this for a small matrix (4x4) but when I try to implement it using the 512x512 it fails and doesn't produce enough blocks for the entire matrix. Here is the code on … |
| | Hey, I'm doing a project and on the last little piece. It involved taking 2 matrices, splitting them into blocks and then checking whether the blocks are simular or not. If the blocks wasn't simular, then swap them /or/ create a new Matrix that holds the values of the second … |
| | Hello, I need to store the cooridants of a vector, for example: If the vector was: 0 1 0 1 0 0 1 0 1 0 0 1 1 1 1 0 0 0 0 0 And this vector is then split into blocks, I need to store the the …  |
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