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I want to plot the vector field on F=x i+ j
Do you mean like this? [x,y] = meshgrid(-3:.15:3,-3:.15:3); Fx = x; Fy = ones(size(y)); %%%%%%%%%%% figure; quiver(x,y,Fx,F...

ongeveer een jaar ago | 0

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i have two set of data for temperature measurements which vary depends on each other. the variation may be divided into three portions. how can we seperate these portions
Here's a possible way (assumes the data is already in the workspace): dT2 = gradient(T2); minval = min(dT2(Time<2.5)); ix = f...

ongeveer een jaar ago | 0

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How to surf very small values keeping the same ratio?
Multiply them all by 1e4.

ongeveer een jaar ago | 0

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whats preventing my code from generating the proper results
I don't know anythng about the physics of your scenario, but are you sure you are calculating NLOS_LOWER_BOUND correctly? The f...

ongeveer een jaar ago | 0

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Finding the optimal solution for a data with two variables
Here's a possible approach (I've used relative errors as the values of the two columns are an order of magnitude different): % ...

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Using loop to sum value of an array and summation
Here's one way: J=[1 2 3 4 5 6 1 2 3 4 5 6]; step = 3; ix = 1:step:numel(J); for i = 1:numel(ix) p(i) = sum(J(ix(i)...

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Solving a system of inequalities using an eigenfunction and if, else.
Your function needs to be more like this, for example. Set values of x outside the function, call the function with these value...

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Почему появилась ошибка?
Seems overcomplicated for a numerical solution! How about simply f = @(x) x - 5 - 1/3*cos(2*x+1) + 2*x./(2+x.^2); g = @(x) x ...

ongeveer een jaar ago | 0

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How to write 2D heat conduction exact solution for Inf n?
Your term sinh(n*pi*x/L) should be sin(n*pi*x/L). See the following code (which can be made more efficient!): L = 1; H = 2; ...

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Help with Riccati equation
You haven't defined B (in the function definition)

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How to create a time function and make a line rotate at a certain angular speed?
Do you mean something like this? r2_length = 2; tend = 10; % s dt = 0.1; t = 0:dt:tend; omega = 1; % rad/s theta = omega*t...

ongeveer een jaar ago | 0

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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...

ongeveer een jaar ago | 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)?

meer dan een jaar ago | 0

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

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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) ...

meer dan een jaar ago | 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...

meer dan een jaar ago | 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...

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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...

meer dan een jaar ago | 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')

meer dan een jaar ago | 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).

meer dan een jaar ago | 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 ...

meer dan een jaar ago | 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 ...

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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...

meer dan een jaar ago | 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.

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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...

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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)

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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 ...

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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, ...

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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...

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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 = ... ...

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