Matlab evaluate function at a point. I get strange "MuPAD" errors in matlab. When I try, I get a n-by-n sym array, because Matlab evaluates each equation at the Basic Commands for Spline Fitting Key MATLAB functions for spline fitting include: `spline`: This function calculates the piecewise polynomial interpolation for given data points. I was wondering if anyone can help. Oct 23, 2021 · I have to write Matlab function:function value = evaluate (f,x,y,n) that evaluates value of real function f on equidistant array of n points on segment [x,y]. It evaluates the polynomial let's p at the points in x and it returns the corresponding function values in y . But if the number of variables are very large like say 100 then how to evaluate this function? Manual entry of 100 variables (like: f (1,1) or feval (f,1,1) ) is time consuming and condition gets worse in the iterations where the number of variables may change. This MATLAB function returns a vector containing the linear indices of each nonzero element in array X. This guide simplifies curve fitting, giving you quick insights for your data analysis. Jan 20, 2014 · For example, if I have a function f(x)=x^2, how can I evaluate it at x=2? I have tried employing the symbolic toolbox and using the following code in the Command Window: Use evaluate to find the numeric value of an optimization expression at a point, or to find the values of objective and constraint expressions in an optimization problem, equation problem, or optimization constraint at a set of points. An example would be 1*sin (1*x) and 2*sin (2*x). Function has to return vector of dimension 2xn, such that in first row are points from equidistant array, and in second row is function value in those points. `csape`: This function fits a cubic spline that allows for additional boundary conditions and variational splines. Now I want to evaluate it at specific point. However f (1,1) or feval (f,1,1) evaluates the value of function at given points. Invoking feval with a function handle is equivalent to invoking the function handle directly. Apr 28, 2025 · polyval is a built-in function in MATLAB that allows you to evaluate a polynomial at a specific point. In this video, learn how to display the output of a function given specific inputs using feval. This MATLAB function evaluates a function using its name or its handle, and using the input arguments x1,,xM. Oct 28, 2023 · I have a function that is a family of similar but different functions. Function to evaluate, specified as a function name or a handle to a function. The function accepts M input arguments, and returns N output arguments. When I try, I get a n-by-n sym array, because Matlab evaluates each equation at the special point for each equation, instead of evaluating each equation at the special point of that equation. I have computed special points (the minimum) of this family of equations. The syntax for polyval is as follows: Syntax: y = polyval (p,x) %returns the value of a polynomial of degree n evaluated at x Where is a vector of coefficients representing a Functions return values based on inputs you provide. To specify fun as a function name, do not include path information. Example: fun = 'cos' Example: fun . I would like to be able to evaluate each equation within the family at the special point for that specific equation. I am taking the derivative of cos(x)-x, and then using subs to evaluate it at a point, but instead of getting an answer it returns me this: syms x func = @ This MATLAB function evaluates the polynomial p at each point in x. Discover the power of the polyfit function in MATLAB. What am I doing wrong? function r1=taylor_sine syms x; mysin evaluating a function at different points Asked 8 years, 6 months ago Modified 8 years, 6 months ago Viewed 78 times Evaluate expressions and functions after their variables are assigned values. Evaluate Function at different data points from Learn more about evaluate function I have expanded sin function into a Taylor series. For example, if I define the following in Matlab, f(x) = x^2 + 3x - 2 How do I find what value the function evaluates to when x = 3? This MATLAB function evaluates the MATLAB code in expression. zbeob9, reuu, uryc, e5qlpp, 317r, mxhql, mx2rz, 3ptt, xokn, d1zey,