how to find frf in matlab?
287961
frf = modalfrf( x , y , fs , window ) estimates a matrix of frequency response functions, frf , from the excitation signals, x , and the response signals, y , all sampled at a rate fs . The output, frf , is an H1 estimate computed using Welch's method with window to window the signals.
348533
['To find for the magnitude and direction of a resultant force when doing vector addition is to find first for the x and y components of the vectors to be added. ... ', '-x-axis. ... ', 'F1 = 5.6 newtons eastward; F2 = 12 newtons 30 degrees west of north; F3 = 9.4 newtons 60 degrees south of west.', 'F1 is eastward hence it is 0 degrees.']
1074434
for x, where F(x) is a function that returns a vector value. x is a vector or a matrix; see Matrix Arguments. x = fsolve( fun , x0 ) starts at x0 and tries to solve the equations fun(x) = 0, an array of zeros.
1331321
['t=0:.1:10;', 'y1=sin(t); % say f1.', 'y2=exp(t); %f2.', 'intersection=find(y1==y2);']
1264800
We can write this principle in equation form as: FB = ρf Vf g. where FB is the buoyant force, ρf is the density of the displaced fluid, Vf is the volume of the displaced fluid, and g is the acceleration due to gravity, 9.8 m/s2.
193080
['Graph the function in a viewing window that contains the zeros of the function. ... ', 'Press [2nd][TRACE] to access the Calculate menu.', 'Press [2] to select the zero option.']
1316819
['dy = y0-y1 ; % error.', 'abs_dy = abs(y0-y1) ; % absolute error.', 'relerr = abs(y0-y1)./y0 ; % relative error.', 'pererr = abs(y0-y1)./y0*100 ; % percentage error.', 'mean_err = mean(abs(y0-y1)) ; % mean absolute error.', 'MSE = mean((y0-y1).^2) ; % Mean square error.']
34913
['Average Velocity. va = (v1 + v0) / 2 (1) ... ', 'Final Velocity. v1 = v0 + a t                   (2) ... ', 'Distance Traveled. s = (v0 + v1) t / 2 (3) ... ', 'Acceleration. a = (v1 - v0) / t (4) ... ', 'Example - Accelerating Motorcycle.']
950003
Równanie stycznej do wykresu funkcji. ... Wtedy styczna do wykresu funkcji f w punkcie (x0,f(x0)) wyraża się wzorem: y−f(x0)=f′(x0)(x−x0).
998028
['Use online converters.', 'Use the formula: a. RCF = (rpm)2 × 1.118 × 10-5 × r. b. ... ', 'Use a nomogram (nomograph).', 'Use Beckman Coulter rotors speed converters here.']
98335
To find FV, you must first identify PV, the interest rate, and the number of periods from the present to the future. The interest rate and the number of periods must have consistent units. If one period is one year, the interest rate must be X% per year, and vis versa.
798303
['State the null hypothesis and the alternate hypothesis.', 'Calculate the F value. ... ', 'Find the F Statistic (the critical value for this test). ... ', 'Support or Reject the Null Hypothesis.']
158974
['example. R = rref( A ) returns the reduced row echelon form of A using Gauss-Jordan elimination with partial pivoting.', 'R = rref( A , tol ) specifies a pivot tolerance that the algorithm uses to determine negligible columns.', '[ R , p ] = rref( A ) also returns the nonzero pivots p .']
994608
['lb = 0; % Set a lower bound for the function.', 'ub = 2*pi; % Set an upper bound for the function.', 'x = NaN*ones(100,1); % Initializes x.', 'starting_points=linspace(0,2*pi,100);', 'for i=1:100.', "% Look for the zeros in the function's current window.", 'x(i)=fzero(@(x)sin(10*x), starting_points(i));', 'end.']
770557
['ceil() :- This function returns the smallest integral value greater than the number. ... ', 'floor() :- This function returns the greatest integral value smaller than the number. ... ', 'fabs() :- This function returns the absolute value of the number.', 'factorial() :- This function returns the factorial of the number.']
547288
['z = (x – μ) / (σ / √n)', '= (70 – 65) / (3.5/√50) = 5 / 0.495 = 10.1.']
651165
['h = the Plank constant 6.63 x 10-34 J s.', 'f = the frequency of the incident light in hertz (Hz)', '&phi = the work function in joules (J)', 'Ek = the maximum kinetic energy of the emitted electrons in joules (J)']