I am looking for a method to compute a derivate using a discrete and fast method. Since now I do not know the type of equation I have, I am looking for discrete methods analog to the ones that we can find for the integral such as, the Euler method. Thanks a lot. ...
Trivial using a for loop or each_with_index, just wondering if there was a better way of doing it using Ruby syntax. I need to create a new array that is the derivative of the source array, eg: for(int i = 1; i < oldArray.length; i++) { newArray[i] = oldArray[i] - oldArray[i-1] } ...
I have a program in SimMechanics that uses 6 derivative blocks (du/dt). It takes about 24 hours to do 10 secs of simulation. Is there any way to reduce the calculation time of the Simulink derivative blocks? ...
To follow up my previous question, I’ve delve a bit more into the “financial derivative trading” world in trying to understand what is means for programmers and how it is like working as a programmer in that environment. I’ve seen positions like “Front Office” programmer positions and “Back Office” programmer positions, I wonder what the...
I'm writing program in Python and I need to find the derivative of a function (a function expressed as string). For example: x^2+3*x Its derivative is: 2*x+3 Are there any scripts available, or is there something helpful you can tell me? ...
Hello all, im trying to finish up my junit testing for finding the derivative of a polynomial method and im having some trouble making it work. here is the method: public Polynomial derivative() { MyDouble a = new MyDouble(0); MyDouble b = this.a.add(this.a); MyDouble c = this.b; Polynomial poly = new Polynomial (a, b, c); ...
Let us assume you can represent a program as mathematical function, that's possible. How does the program representation of the first derivative of that function look like? Is there a way to transform a program to its "derivative" form, and does this make sense at all? ...
Hi! I'm interested in building a derivative calculator. I've racked my brains over solving the problem, but I haven't found a right solution at all. May you have a hint how to start? Thanks I'm sorry! I clearly want to make symbolic differentiation. Let's say you have the function f(x) = x^3 + 2x^2 + x I want to display the derivative...
Hi, I am using D to get derivatives of a function. However, R does not simplify the expression when returning the derivative. I need to figure out if a function has a derivative that can be expressed generically. Is there some way in R to simplify the expression? > D(expression(sqrt(1 - x^2)), 'x') -(0.5 * (2 * x * (1 - x^2)^-0.5)) > D(...
I would like to ask if some one can explain to me what are the differences of syntax-directed tangent-linear code and adjoint code. It is related to derivation of code with a compiler. I understand that they are different ways to make the derivations of the mathematical equations in a program, but, I don't know exactly how to interpre...
Savitzky-Golay smoothing filter can be used to calculate the coefficients so as to calculate the smoothed y-values by applying the coefficients to the adjacent values. The smoothed curve looks great. According to the papers, the coefficients can also be used to calculate the derivatives up to 5th order. The coefficients calculation para...