addition

问题 I have two matrices I want to sum based on their row and column names. The matrices will not necessarily have all rows and columns in common - some may be missing from either matrix. For example, consider two matrices A and B: A= B= a b c d a c d e v 1 1 1 0 v 0 0 0 1 w 1 1 0 1 w 0 0 1 0 x 1 0 1 1 y 0 1 0 0 y 0 1 1 1 z 1 0 0 0 Column e is missing from matrix A and column b is missing from matrix B. Row z is missing from matrix A and row x is missing from matrix B. The summed table I'm looking

问题 Recently, in R2016b a feature was added to MATLAB, which is causing a lot of headaches in the school where I teach. Nowadays formulae, which traditionally would be considered illegal or at least shady maths are executed successfully: [1, 2] + [3, 4]' -> [4, 5; 5, 6] [1, 2]' + [3, 4, 5] -> [4, 5, 6; 5, 6, 7] So adding a row vector to a column vector is treated as an addition of two matrices one can get from repeating the vectors up to the "suitable" dimensions. In older versions this would

问题 I'm new in Delphi. For a project required by my company, I need to translate some code from our existing C++ classes to Delphi. Some of these classes are templates, such as: template <class T> struct APoint { T m_X; T m_Y; virtual void Add(T value); }; template <class T> void APoint<T>::Add(T value) { m_X += value; m_Y += value; } I use it e.g. with this code APoint<float> pt; pt.m_X = 2.0f; pt.m_Y = 4.0f; pt.Add(5.0f); and this works well. Now I need to write equivalent code for Delphi. I

问题 I'm new in Delphi. For a project required by my company, I need to translate some code from our existing C++ classes to Delphi. Some of these classes are templates, such as: template <class T> struct APoint { T m_X; T m_Y; virtual void Add(T value); }; template <class T> void APoint<T>::Add(T value) { m_X += value; m_Y += value; } I use it e.g. with this code APoint<float> pt; pt.m_X = 2.0f; pt.m_Y = 4.0f; pt.Add(5.0f); and this works well. Now I need to write equivalent code for Delphi. I

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: python - decimal place issues with floats Python float equality weirdness In the code below I have the variable percentage which is a float. I have it set up so that the if number reaches 10,000 , percentage is suppose to go up by .01 . # Tries to find a number that when squared and 5%'ed is still a square. import math print("Script has started:\n") percentage = .1 number = 1 while number != -1: number = number

问题 I would like to do an update by doing a simple addition on Sequelize. table: id || data 1 || 10 sample: db.table.update({ data : 1 }, { where: { id: 1 }}); after this query id || data 1 || 11 I know it's a simple question, but I could not find the solution. Which operator can I add and subtract? Thank you 回答1: Here it is : db.table.update({ field: Sequelize.literal('data + 1') }, { where: { id: 1 }})) OR User.findById(1).then(user => { // -----> First Way return user.increment('my-integer

问题 Through my javascript library, I end up with a string that represents a number. Now I want to preform an addition on that number without it doing a string concatenation instead. The solution is easy ( How do I add an integer value with javascript (jquery) to a value that's returning a string?, How to make an addition instead of a concatenation) if your number is always in integer. However my string could be a float or an integer, and at the time of the addition, and I don't know which it will

问题 This question already has answers here : Closed 9 years ago . Possible Duplicate: Is JavaScript’s Math broken? Why does JS screw up this simple math? console.log(.1 + .2) // 0.3000000000000004 console.log(.3 + .6) // 0.8999999999999999 The first example is greater than the correct result, while the second is less. ???!! How do you fix this? Do you have to always convert decimals into integers before performing operations? Do I only have to worry about adding (* and / don't appear to have the

问题 Does anyone know how to add 2 binary numbers, entered as binary, in Java? For example, 1010 + 10 = 1100 . 回答1: Use Integer.parseInt(String, int radix). public static String addBinary(){ // The two input Strings, containing the binary representation of the two values: String input0 = "1010"; String input1 = "10"; // Use as radix 2 because it's binary int number0 = Integer.parseInt(input0, 2); int number1 = Integer.parseInt(input1, 2); int sum = number0 + number1; return Integer.toBinaryString

问题 I am trying to add 2 char arrays in cuda, but nothing is working. I tried to use: char temp[32]; strcpy(temp, my_array); strcat(temp, my_array_2); When I used this in kernel - I am getting error : calling a __host__ function("strcpy") from a __global__ function("Process") is not allowed After this, I tried to use these functions in host, not in kernel - no error,but after addition I am getting strange symbols like ĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶĶ . So, how I can add two ( or more ) char