Respondida
merge two matrices after odd rows
Here's one way: A=[1 1;1 1;1 1]; B=[2 3;4 5;6 7]; AB = [A B]'; C = reshape(AB,2,6)'

alrededor de 4 años hace | 0

Respondida
Hello, I am trying to solve the ODE but I have an error I do not understand how to solve. Would appreciate some help. Thank you!
Like this? %% ODE45_estimation % ------ Constants ------ % m = 1248.5; g = 9.81; W = m*g; S = 17.1; % ------ Time int...

alrededor de 4 años hace | 0

Respondida
plotting Solid of revolution of a function
How about: X = 0:0.1:pi; R = sin(X); [z,x,y] = cylinder(R); surf(x,y,z)

alrededor de 4 años hace | 2

Respondida
Split an array using specific points
Like this? Y = [5;2;3;6;7;9;5;5;6;3;8;7;74;9;63;47;10;3]; diiv = [5; 9; 15]; y1 = Y(1:diiv(1)); y2 = Y(diiv(1)+1:diiv(2)); ...

alrededor de 4 años hace | 1

Respondida
Algorithm for Fractional power calculation
How about using the Newton-Raphson algorithm. Here's the basic idea: % x^n = b % Let f(x) = x^n - b % dfdx(x) = n*x^(n-1) %...

alrededor de 4 años hace | 0

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Stochastic differential equation Gompertz plotting a graph
You have x(1) = 0, so log(x(1)) is -Inf, which means that subsequent values of x will be NaNs.

alrededor de 4 años hace | 0

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Respondida
Defining integration function in matlanb
Like this? % If Cp is a constant then the integral is just Cp*T % If it is a function of T, then define the function: Cp = @(...

alrededor de 4 años hace | 0

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Plotting and coding problems
More like this perhaps: T = 300:0.5:500; w = 0.224; Tc = 304.2; ...

alrededor de 4 años hace | 0

Respondida
I am getting error, "array indices must be positive or logical integer values". Please help
You need multiplication signs between n and (w1+k) in calculations of u and z: [X,Y] = meshgrid(-4:0.2:4); n=2; k=1; %n=1,...

alrededor de 4 años hace | 0

Respondida
Need help in finding all the solutions of non linear ellipse equations using Newtons Method using following code.
Check your Jacobian equations, especially the term: 2*x(1)+2*x(1)+4; I think this should be 2*x(1)+2*x(2)+4;

alrededor de 4 años hace | 1

Respondida
Displayin command just once for the n number of iterations
What about if k == 0 disp("Hello World!") elseif k == 480 disp("Bye Bye World!") end

alrededor de 4 años hace | 0

Respondida
Index in position 1 is invalid. Array indices must be positive integers or logical values.
In line V(i,j+1) = ((1-2*s-k).*V (i,j))+ (s.*(V (i-1,j) + V (i+1,j))) - (k.*(Rm.*Iinj+Vrest)); you have V (i-1,j). When i is ...

alrededor de 4 años hace | 0

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Respondida
What is the way of solving the noise added differential equations in matlab?
Try to avoid the (mis)use of global! %% ----------------INPUT PARAMETERS--------------------------- f=0.33; alpha=0.5; w0=sqrt...

alrededor de 4 años hace | 0

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Respondida
Unable to perform assignment because the left and right sides have a different number of elements.
Like this? clear %Vmax values for each reaction step v1=0.01:0.01:2; v2=1; %Km values for each reaction step K1=1; K2=1; ...

alrededor de 4 años hace | 0

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Respondida
How do I create a stacked plot like attached figure using subplot command ?
Try help stackedplot

alrededor de 4 años hace | 0

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Second order equations. Cauchy task
More like this: % Write equations as follows: % dudx = v u(0)=-1 % dvdx = -v/4-6u v(0)=0 % % Then you hav...

alrededor de 4 años hace | 1

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Respondida
Runge Kutta 3 ODE
You can't have t(i)=t(0)+i*h; indices must be a positive integer - you have t(0), Matlab doesn't like this!

alrededor de 4 años hace | 0

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Respondida
Why it is saying this? Index in position 2 is invalid. Array indices must be positive integers or logical values. Error in Homework (line 21) surf(x,y,F(i,j))
Like this x=[-5:5]; y=[-5:5]; for i=1:numel(x) for j=1:numel(y) if (x(i)>=0)&&(y(j)>=0) F(i,j)=2.*x(i)+y(j)^2; en...

alrededor de 4 años hace | 0

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Respondida
Definite integral with parameter
You could try something like this: a = 0.043478; q = 100; % Ha W = 40; t = 4; c = @(x,Fa )(5.*x.^2-Fa.*x)./(((a.*x+q).*W-((...

alrededor de 4 años hace | 0

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Respondida
Integration of a joint pdf with for loop?
When k = 1and i = 1 then k-i = 0, therefore the second index in fun(i,k-i) is 0, but indices must be positive integers in Matlab...

alrededor de 4 años hace | 0

Respondida
How would you I write a matlab function for theta that represents the 2nd order differential of the torque equation?
Does this help? % Theta seems to have two components, so: D(theta) = [p1+p2+2*p3*cos(theta(2)) p2+p3*cos(theta(2)); ...

alrededor de 4 años hace | 1

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Respondida
Error message with arrays
You only need h = [2:20:220]; t_a = 293; q_flux = 800; n = length(h); y = q_flux./h+t_a; i = i+1; plot(h,y)...

alrededor de 4 años hace | 0

Respondida
How to solve two coupled differential equations using ode45.
"Why is my previous code is not working properly by treating the problem to be a DAE." I don't know! "Also I noticed you wrote...

más de 4 años hace | 1

Respondida
Multiple Anonym Function return wrong values
Here's one solution: C = [4622 5480 18923]*1e-12; U = [454e3 454e3-20e3 20e3].*sqrt(2); W = Energy(C,U); disp(W) function W...

más de 4 años hace | 0

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Respondida
Hi, is it possible to have variables in an ode45 that varies according to another function?
Put something like [T, p, rho, speedsound] = atmos(height); immediately after height = x(1); in function dynameqn. Not sur...

más de 4 años hace | 0

Respondida
root finding and plot of graph
Are you looking for something like this? hi = 1e-6; lo = 1e-9; n = 500; dt = (hi-lo)/n; t3 = lo:dt:hi; y = f(t3); subplo...

más de 4 años hace | 0

Respondida
Calculator result and MATLAB result are different
Have you checked that both are using degrees, or both radians? The Matlab as you've written it is using radians (use sind(24) a...

más de 4 años hace | 1

Respondida
How can I rotate a set of points by an angle around its origin?
Do you mean like this? ITM = [461400.0758 617474.3059 461400.8069 617475.4609 461400.8069 617475.4609 461402.3069 617477.633...

más de 4 años hace | 1

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Respondida
Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.
Try replacing x(4) = Velocities(3608.9,5249.3); by x(4,:) = Velocities(3608.9,5249.3); Same for x(5).

más de 4 años hace | 0

Respondida
Removing zeros from matrix
Like this? A = [1 2 3 4 5 6; 1 2 3 4 5 6; 1 2 3 4 5 0; 1 2 3 4 0 0; 1 2 3 0 0 0]; B = A'; B=B(:); B(B==0)=[]

más de 4 años hace | 0