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why my code keeps showing not enough input argument when i try to publish?(get a ans and there is nothing about error but when I publish there it is
You had a couple of minor issues - see code below (which now works): [root,vals,numiters,ierr] = my_bisect(@(x) cos(x)-x , 0 ,1...

5 years ago | 0

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from Hz to radiant
Yes, though it would be more elegant to use 2*pi instead of 6.28.

5 years ago | 1

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Error in ODE45 when using ...................... >> [t,x] = ode45(@odefcn,tspan,[0 0]);
The first approach needs to be structured as follows: a=-1; b=-2; c=0; u=3; tspan = [0 20]; [t,x] = ode45(@odefcn,tspan,[0 0]...

5 years ago | 1

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how to find unknowns for series of input values?
Do you mean you want to find the values of x and y that satisfy 2*x*2 - 3*y*4 = 100? If so you should be aware that there are a...

5 years ago | 1

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Changing constant with timespan in ode45 solver
Make x a function of t and call it from the function defining the rate equations ode45 is calling..

5 years ago | 0

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Sorting and replacing data in matlab
Here's one way: A =[ 1, 0, 3, 4, 5, 6, 7, 8, 0, 0,15, 20, 10, 9]; c1 = 0.1; a = 0.01; ix = find(A>5); for i = 1:numel(ix) ...

5 years ago | 1

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I need HELP. Heat transfer ODE problem with bvp4c
Just upload the pdf as an attachment.

5 years ago | 0

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For loop running n times wont work
You have for n = .2:2 ... But then call [Tatm(n),Tsurf(n)] ... However, the indices to Tatm(n) etc must be integers, not 0....

5 years ago | 0

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Polar plot using polyfit
I'm somewhat confused by your question and don't understand the need for all the flip commands! However, does the following mee...

5 years ago | 0

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I need HELP. Heat transfer ODE problem with bvp4c
You have an initial condition problem rather than a boundary condition problem (where you know values at the start and end x val...

5 years ago | 1

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Computing terms of a sequence generated by a nonlinear difference equation
Must be the fact that you are using symbolic maths. Without that it's fast (as long as you specify a value for alpha of course)...

5 years ago | 0

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FitzHugh-Nagumo model
Like so: % Replace the following constants with your own values tspan = [0 1]; % start and end times v0 = 0; w0 = 0; % initi...

5 years ago | 1

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how to change graph size using quiver, fcontour and hold on
At the end type axis([0 10 0 10])

5 years ago | 1

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How to plot data with >2 dimensions?
Look at documentation on plot3

5 years ago | 0

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I want to make a recursive formula and execute two statements with the same variables at the same time
I'm obviously not understanding something here (not unusual!),. Doesn't the following do what you want: a = 1; b= 0; n = 5; ...

5 years ago | 0

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I want to make a recursive formula and execute two statements with the same variables at the same time
What about a temporary variable for b: ... bt = b; b = [a]; a = [a bt]; ...

5 years ago | 1

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How to plot an Explicit function with inseparable
having set values of Ibar you could find Pbar using function fzero. Like so: Ibar = 1:0.001:2; pbar = zeros(1,numel(Ibar)); ...

5 years ago | 0

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Can I have a title over a section of subplots?
Something like this perhaps x = 0:0.1:6; y1 = sin(x); y2 = sin(2*x); y3 = cos(x); y4 = cos(2*x); subplot(2,2,1) plot(x,y1...

5 years ago | 0

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Find five correct decimals of temp at x
How about using T1 = interp1(x,T,1); Use a finer mesh of x values if the result isn't satisfactory.

5 years ago | 0

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Correlation between two signals
I don't see why you shouldn't use a Pearson r correlation: A = a - mean(a); B = b - mean(b); r = A*B'/ (norm(A)*norm(B));

5 years ago | 0

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Euler Method System of ODE solving
Your function, f = @(t,y) ... has vector y with just three components, but you call it in your Euler routine with i = 4 ... y n...

5 years ago | 0

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I am trying to solve a 2nd order non linear differntial equation with 2 boundary conditions . Please help me write the code.
Here's one way of doing this (obviously, you need to replace my arbitrary constants with your proper values): % Data (replace ...

5 years ago | 1

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ode1 error Euler's method
Apart from the fact that you forgot to put "end" at the end of the function (the "end" of the "for" loop doesn't count), there i...

5 years ago | 0

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I am trying to apply the steps attached to the pdf file into my code
Your function starts with function d = my_det(A) but, nowhere within it is there any calculation of d, so the function doesn't...

5 years ago | 0

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the calculation of the eigenvector
You seem a little confused about eigenvalues and eigenvectors. The following code might provide some clarification: B = [0.606...

5 years ago | 1

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The roots for an equation containing tangent
If x*1.4 - atan(0.28*x)=37.5 is the equation then fixed point iteration will work. Rewrite the equation as x(n+1) = (37.5+atan...

5 years ago | 0

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Need to solve ode equation which are dependent
Your equations can be manipulated as follows Equations (1) and (2) can be solved directly as functions of z. Equations (3) a...

5 years ago | 1

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solving 2nd order nonlinear ode Numeric solution by using ode45
This is the basic structure for solving the ode. u0 = 2; v0 = 0; tspan = [0 5]; k = 1; a = 25; [t,U] = ode45(@odefn, ts...

5 years ago | 0

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how to solve the below equation where current solution is the initial condition for the next iteration
You can substitute your expression for u into your ode and rearrange to get dydt = ... in terms of parameters that don't have u ...

5 years ago | 0

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Putting multiple ODE equations into one script
In v = x(1); b = x(2); dvdt(1) = (ps.v_in - v(1)) - (ps.k .* ps.area .* ps.delta_P); dbdt(1) = (ps.b_in - b(1))/ps.tau; v a...

5 years ago | 0