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plotting, no graph appears
@Patrick Monst Because you forgot the 'dot' when dividing corresponding elements in the x vector. x = 0:0.01:1; y = (0.5*(1-x...

4 years ago | 0

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given the aeeay of angles an = pi/n,n=2,3,...,9.generete a script that computes cos an and display the results as
@Mrunal Shah If you don't want to use the For loop approach, then try this: n = 2:1:9 A = [n; cos(pi./n)]; fprintf('%s %10s\...

4 years ago | 0

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How do i get a direction field plot?
Hi @Tuân Nguyen Because there are two equilibrium points and , I think it should look like this. [T, P] = meshgrid(0:6e3/14:6...

4 years ago | 2

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How to design PI controllers within Maltab?
Hi @Kyle Ramphal If the result from the PID Tuner app can be admitted as the design solution, then just do so to directly obtai...

4 years ago | 1

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How to solve and graph a second order nonlinear differential equation?
Hi @Parcher Not exactly sure what you are tring to solve, but this worth a try, although it may not be the exact solution that ...

4 years ago | 0

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How to solve an equation with two variables?
@Enver Kocaman The surface has singularities because there are conditions that cause , (division-by-zero). The surface shows a...

4 years ago | 0

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How to add my IQ samples in Simulink as input data?
Hi @raya alhajri You can load data from MAT file into Simulink model using the "From File" Block directly: https://www.mathwor...

4 years ago | 0

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how to collect similar equation and find all of them
@wlat hamad Have you checked if the collect() function works for your case? https://www.mathworks.com/help/symbolic/sym.collec...

4 years ago | 1

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Answered
Print value of correlation to a plot displaying two functions
@Loriann Chevalier Perhaps like this? v = corr(y1,y2,'Type','Kendall'); txt = ['Corr = ', num2str(v)]; text(4, 0.5, txt)

4 years ago | 0

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How to do an elimination procedure to represent the solution (matrix)
Can you show the slides and elimination formulas? Otherwise, I think this elimination procedure: A = [1 -2 1; 0 2 -8; ...

4 years ago | 2

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How to plot two vectors at the same time
@Jonas Morgner, Do you mean llke this? v1 = [1 -2 -5 6]; v2 = -100 : .1 : 100; y = polyval(v1, v2); plot(v2, y)

4 years ago | 2

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Answered
In the fraction formed by the symbolic variable "s", the coefficient is too large and shows as “Inf”, which cannot separate the numerator and denominator. How to simplify it？
@梦雪王, Have you tried this? sympref('FloatingPointOutput', true) It should display the expression in floating-point format.

4 years ago | 1

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Using ‘surf’ plot the surface f (x, y) =x(x^2+y^2).
I guess it's here: z=x.*(x.^2 + y.^2);

4 years ago | 1

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Evaluate the expression 𝑦 = 4𝑥3 + 6𝑥2 + 𝑥 + 1 using MATLAB for 𝑥 = 2.
@Muhammad Kashif This is very strictly based how you displayed the equation. x = 2; y = 4*x*3 + 6*x*2 + x + 1 Mostly likel...

4 years ago | 0

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Evaluate (3-4i)(-4+3i) in MATLAB.
@Muhammad Kashif You will need a Alphanumeric Keyboard lets the user type in Latin alphabet, numeric characters, and mathemati...

4 years ago | 1

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Problem with designing MPC
Hi @Marcin Pilzak Because you need to have the MPC object in the Workspace. And this is how you create a basic one: Plant = tf...

4 years ago | 0

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How to find steady state solution of recatti equation
@shahin sharafi You can find the solution for x with the Implicit algebraic Riccati equation solver: [X, K, L] = icare(A_Star,...

4 years ago | 0

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how to save variables in a for loop
@ADNAN KIRAL for x =1:5 y(x) = x*x; end disp(y)

4 years ago | 1

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How to calculate rise time, settling time, and overshoot based on real data measurements
Hi @Konvictus177 The rise time, settling time, and percentage overshoot can directly obtained from measured step response data....

4 years ago | 1

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Solving a non linear ODE with unknown parameter
Hi @khaoula Oueslati This governing equations are given and you have acquired the data. The objective is want to find . ...

4 years ago | 0

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What is this symbol?
@hyun woo ryu It's a Selector. https://www.mathworks.com/help/simulink/slref/selector.html

4 years ago | 1

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Solve equation by fzeros
@Hoang Vu Huy The fzero requires initial guess. Pick the initial value that is closest to the root: fzero(@(x) x - 4*sin(x), p...

4 years ago | 1

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How do I print the solution equation from an ode solver
@Alex Monserrat Use the text() function: tspan = [0 5]; y0 = 0; [t, y] = ode45(@(t,y) 2*t, tspan, y0); % disp([t, y]); plo...

4 years ago | 1

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Answered
How to get area under the fit attained by Curve Fitting tool?
Hi @Anik Mukhopadhyay You can check if this works: t = linspace(0, 270, 10); T = [30 32 34.5 38.6 40 42 42.5 42.5 42 41.5]; ...

4 years ago | 0

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Finding the value of the below curve
Hi @Amy Topaz Since the curves are arctangent functions, the max values can be found at the boundary, in this case, that is a11...

4 years ago | 0

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how to solve Energy balance equation
@kashif kamal You can use this sample and assign known values to the parameters in the Energy balance equation. % Constants V...

4 years ago | 1

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does anyone has the Matlab code for photovoltaic maximum power point tracking using simulated annealing algorithm?
Hi @Shema If you are looking for the Maximum Power Point Tracking model, then you can find many sample MPPT models in FileExcha...

4 years ago | 1

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Rearrange an equation to solve for a different variable
@Brian Kirkland If the explicit solution cannot be found, then it is probably a transcendental equation, just like this one: ....

4 years ago | 0

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Hi, I have a problem understanding the use of odetovectorfield for converting syms variables into a vector for ODE45 input.
Hi @liouville In order to use odeToVectorField() effectively, the highest-order derivatives must appear linearly, and in your s...

4 years ago | 1

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Answered
Getting a solution for two coupled nonlinear differential equations
@sardar peysin Please check if this works out for your study: A = 1.0; B = 1.0; fun = @(t, x)[-A*x(1)*x(2)^4; % 1st OD...

4 years ago | 4

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