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Cannot get integral function to work for two limits
Try this %Enthalpy datum conditions (Kelvin) Ti=(25+273.15); %Input temperature (Kelvin) T1=(183+273.15); %Output tem...

11 mesi fa | 0

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I have some errors in executing the following code, can anyone help me please?
You have no initial guesses for y(5) and y(7). And what about y(6)?

12 mesi fa | 0

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How can I plot a diagram with 12-15 different colors
Specify the colors with RGB triplets. doc Color

quasi un anno fa | 0

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This code give me an error of Index exceeds array bounds.
More like this? m=60; g=9.81; k=80; m_2=10; m_1=15; h=100; w=15; t=1:10:100; x = zeros(1,numel(t)); for i=1:numel(t) ...

quasi un anno fa | 0

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Why does MATLAB grader refuses to get my answer with the double integral evaluation problem?
As follows Oops! I did the sum incorrectly! Should have been like this: % box side length delta = 0.01; % mid box points...

circa un anno fa | 0

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initial condition vector longer than ODE vector?
Do it like this: a=2; b=5; % v0 is now set to 10 v0=10; % Using a,b to determine rest of variables R=10*a; C=0.0001...

circa un anno fa | 1

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Can some one fix this code? I am unable to understand this code? Though fixing one problem another problem is arising ! please help!
In the following line: G = (randn(Np,Mtot)+1j*randn(Np,Mtot))/sqrt(2); % When i=1, G is 1x20, but H is 20x2 so the following l...

circa un anno fa | 0

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Connect all dots I polarplot
Like this? r=[10:36:360 10]; r = r/360*2*pi; s=[5,3.5,5,4,4,3.5,4,4.2,4.7,4, 5]; polarplot(r,s,'-x')

circa un anno fa | 0

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I dont understand this error in line 653 and the end goal is to make a graph
Get rid of the gaps between Consibio and Cloud, and between Cloud and Datalog (In the file name and when calling it).

circa un anno fa | 0

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How can I solve the following PDE?
Try setting tau = T - t, so that dA/dt = -dA/dtau etc, and A(T) , B(T) become A(0), B(0). i.e. turn the boundary value problem ...

circa un anno fa | 0

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how to use ode45 to solve motion equation with Matrix
Does this help? %% Data M =[ 0.0210 0.0014 -0.0209 0 0 0 0 0 0.0014 ...

circa un anno fa | 1

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Subscript indices must either be real positive integers or logicals always show up. what should i do?
Well, this works, but you might want to check the correctness or otherwise of your mode_shape calculations (there are a lot of z...

circa un anno fa | 1

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incorrect number or types of inputs or outputs for function 'int'
Replace your power calculation with power = (1/T_0) * trapz(t,y.^2); Edited - Walter is correct.

circa un anno fa | 0

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Regula-falsi Method that keeps running
Brackets!! f = @(x) 2.^x - x.^2 - 2; % Function whose roots are desired xL = 4; xU = 5; % Initial guesses Tol = 1...

circa un anno fa | 0

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Trying to answer a math problem using newton's method but having problem in the function.
Matlab doesn't like implied multiplication (x ^ 2)z should be (x ^ 2)*z etc. Also, in Matlab log(x) is ln(x)

circa un anno fa | 0

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How to set multiple values of a threshold?
Here's one way: tolX1_4 = [1 1 1 1 1 -1 1 1 0 1 1 1 1 1 1 1 1 ...

circa un anno fa | 0

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Please help solve a system of differential equation
Here's a numerical approach: First manipulate the equations tspan = [0, 120]; ic = [80000, 0.001]; [t, xy] = ode45(@rate, ...

circa un anno fa | 0

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how ode solver works
doc ode45 Go to the References section. The two references listed will supply you with all you need to know about the ode solv...

circa un anno fa | 0

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Solve Differential Equation with initial conditions and function
Try modifying your if statement in Moment. Something like if x<a V =...; M = ...; elseif x>=a && x<L M = ... ...

circa un anno fa | 0

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problem in creating function file using ode45
Are you looking for something like this? (I might have misinterpreted your equations!) O=1; a=pi/2; g=9.81; L=100; tspan ...

circa un anno fa | 0

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how can eliminate negative data in erf function?
Should term2(i) = (sqrt(lemdaD)./(2.*e1(i))).*exp(-(v1(i).*sqrt_avgsnr - v2(i).* mu).^2./(2.*e1(i).^2)).*.... erf((e4(...

circa un anno fa | 0

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Why is my plot not showing for improved Euler method?
You need to keep track of each step. Your original simply overwrites the values of t and y at each step. dy=@(t,y) -(0.1/10^(1...

circa un anno fa | 1

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Why I couldn't plot this graph f=(@(x,y) (x.^2)+(x*y)+(y.^2)<=68200.^2/3);
This will give you the outline (I've assumed you want 68200^(2/3) rather than 68200^2/3) f=@(x,y) x.^2+x.*y+y.^2-68200.^(2/3); ...

circa un anno fa | 0

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I want to solve a simple "y=mx+c" with initial condition to find value of "m" and "c" but i am getting error by using following code. Any idea to tackle this kind of problem?
These are simple linear equations in m and c so set: X = [x(1) 1; x(2) 1]; Y = [y(1); y(2)]; and solve using X\Y to get m a...

circa un anno fa | 0

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I have been trying to code a solar pv module for 1 diode model, the following is my code, can someone tell me the mistake ive made and the correction to it pls.
Like this? Note: I've made kref positive to avoid the I's being complex. This might be completely incorrect!! Pmpp = 50; ...

circa un anno fa | 1

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Reorganization of data in matrix
Like this? M = [1 1 0.270588872500870 1 1 0.191034400222846 1 1 0.316821350897659 1 1 0.391794699189989 1 2...

circa un anno fa | 0

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LogLog Plot is Blank
Like this? (I've assumed you want log base 10 everywhere): %Paschen Curve Plotting for H2 p = 1.2; %Torr d = 20; %cm GamSE ...

circa un anno fa | 1

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How to combine multiple numbers into 1 number?
Do you mean R1 = 2; R2 = 4; Zr1 = [0 0 0]; R = R1*10^4+R2*10^3+Zr1(1)*10^2+Zr1(2)*10+Zr1(3) Alternatively: R1 = 2; R2 = 4; Z...

circa un anno fa | 0

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Runge Kutta Fourth order and Interpolation
Shouldn't f1 = @(z,r,ed,p11,m11) -(ed+p11)*z*m11.^3 *((r+1)./(((ed+p11)*(r.^2 +z.^2).^6) -(r/p11))) ./(2*pi*(r.^2 + z.^2)) ; ...

circa un anno fa | 0

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Newton Raphson method for a system of non-linear equations?
Here's a simple example for you to follow: % Functions f = @(x,y) x^2 + y - 5.94; % i.e. the equation is x^2+y=5.94 g = @(x,...

circa un anno fa | 0

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