I want to do something like this:syms x1 x2 h11 h12 h21 h22 x = [x1 x2] matrix = [h11 h12; h21 h22] And then create my function as:f(x, matrix) = ((2*matrix)^(-1/2))*(x'); But I must be doing something wrong because I get:Error using sym/cat>checkDimensio...
错误使用 sym>convertChar Character vectors and strings in the first argument can only specify a variable or number. To evaluate character vectors and strings representing symbolic expressions, use 'str2sym'. 出错sym>tomupad (第 1608 行) S = convertChar(x); 出错sym (第 400 行) S.s = tom...
I created a symbolic function in MATLAB R2021b using this script with the goal of solving an ODE. syms phi(x) lambda L eqn_x = diff(phi,x,2) == -lambda*phi; dphi = diff(phi,x); cond = [phi(0)==0, dphi(1)==0]; % this is the line where the problem starts d...
The result is a = 1/3 rats (a) Once youve created a symbolic expression, you might want to change it in some way; Perhaps you want to extract a portion of the expression to merge two expressions or evaluate the values expressed. There are many symbolic tools that can help with these...
You can substitute a symbolic variable with a numeric value by using the subs function. For example, evaluate the symbolic expression f at the point x = 1/3: syms x f = 2*x^2 - 3*x + 1; subs(f, 1/3) ans = 2/9 The subs function does not change the original expression f: ...
Substitute the variable A with another expression and evaluate the new function. Create a 2-by-2 symbolic matrix variable A. Create a symbolic matrix function f(A), keeping the existing definition of A in the workspace. Assign the polynomial expression of f(A). syms A 2 matrix syms f(...
attempts to find another symbolic expression,F, so thatdiff(F)=f. That is,int(f)returns the indefinite integral or antiderivative off(provided one exists in closed form). Similar to differentiation, int(f,v) uses the symbolic objectvas the variable of integration, rather than the variable det...
expression_indexIndexed accessindexvalIndexed access to arrays and tables without evaluationinfoPrints short informationlastAccess a previously computed objectresetRe-initialize a sessionunitPhysical unitsvalValue of an objectquitReserved wordshareCreate a unique data representationOperators and Elementary ...
.';yq=linspace(0.000,radiusField,mGrid).';[xq,yq]=meshgrid(xq,yq);[Exq,Eyq]=evaluate...
Substitute the variable A with another expression and evaluate the new function. Create a 2-by-2 symbolic matrix variable A. Create a symbolic matrix function f(A), keeping the existing definition of A in the workspace. Assign the polynomial expression of f(A). Get syms A 2 matrix ...