回答済み
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)'

4年弱前 | 0

回答済み
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...

4年弱前 | 0

回答済み
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)

4年弱前 | 2

回答済み
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)); ...

4年弱前 | 1

回答済み
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) %...

4年弱前 | 0

回答済み
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.

4年弱前 | 0

| 採用済み

回答済み
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 = @(...

4年弱前 | 0

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

4年弱前 | 0

回答済み
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,...

4年弱前 | 0

回答済み
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;

4年弱前 | 1

回答済み
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

4年弱前 | 0

回答済み
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 ...

約4年前 | 0

| 採用済み

回答済み
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...

約4年前 | 0

| 採用済み

回答済み
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; ...

約4年前 | 0

| 採用済み

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

約4年前 | 0

| 採用済み

回答済み
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...

約4年前 | 1

| 採用済み

回答済み
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!

約4年前 | 0

| 採用済み

回答済み
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...

約4年前 | 0

| 採用済み

回答済み
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-((...

約4年前 | 0

| 採用済み

回答済み
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...

約4年前 | 0

回答済み
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)); ...

約4年前 | 1

| 採用済み

回答済み
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)...

約4年前 | 0

回答済み
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...

約4年前 | 1

回答済み
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...

約4年前 | 0

| 採用済み

回答済み
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...

約4年前 | 0

回答済み
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...

約4年前 | 0

回答済み
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...

約4年前 | 1

回答済み
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...

約4年前 | 1

| 採用済み

回答済み
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).

約4年前 | 0

回答済み
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)=[]

約4年前 | 0