Matlab Derivative Of Data Math
For differentiation you can differentiate an array of data using gradient which uses a finite difference formula to calculate numerical derivatives.
Matlab derivative of data math. Y exp x cos x exp x sin x to find the derivative of g for a given value of x substitute x for the value using subs and return a numerical value using vpa. Increase number of data point to see if there are any difference. In its simplest form a function whose derivative we wish to compute is passed as an argument to the diff command. Find the derivative of g at x 2.
Derivative of a matrix in matlab. You can use the same technique to find the derivative of a matrix. Introduction to matlab derivative of function. If we have a matrix a having the following values.
Dydx diff y diff x. This article is focussed on understanding how matlab command diff can be used to calculate the derivative of a function. Y diff eps. Compare the data in a 2d array and or plot both the exact value of and the approximation in the same plot.
X sin 5 x diff a which will return. Y exp x cos x exp x sin x to find the derivative of g for a given value of x substitute x for the value using subs and return a numerical value using vpa. Matlab contains a variety of commands and functions with numerous utilities. Syms x a cos 4 x 3 x.
To calculate derivatives of functional expressions you must use the symbolic math toolbox. Approximate the derivative y with respect to x. Dydx diff eps. If you want dydx to be the same length as x and y so you can plot it against x zero pad the first value with eps.