Answered

How can I reshape single column vector list into equally sized matrix columns

s = mod(26599,512); n = 26599 - s; m = n/512; R = horzcat(reshape(sample_test(1:n),512,m),vertcat(sample_test(n+1:end),NaN(51...

How can I reshape single column vector list into equally sized matrix columns

s = mod(26599,512); n = 26599 - s; m = n/512; R = horzcat(reshape(sample_test(1:n),512,m),vertcat(sample_test(n+1:end),NaN(51...

10 Tage ago | 0

Answered

Solving a discrete logarithm problem returns a 0x1 sym or Unable to find explicit solution

Brute force: x = 0:24; y = uint64(6.^x); d = mod(y,11); x = x(d==2)

Solving a discrete logarithm problem returns a 0x1 sym or Unable to find explicit solution

Brute force: x = 0:24; y = uint64(6.^x); d = mod(y,11); x = x(d==2)

10 Tage ago | 0

Answered

Why do I receive this error when using cumsum: "Invalid data type. First input argument must be numeric or logical." ?

Try this: function main file_name = 'sample_test.txt'; H = dfaedit(file_name,1,1,1) end function [H]=dfaedit(file_...

Why do I receive this error when using cumsum: "Invalid data type. First input argument must be numeric or logical." ?

Try this: function main file_name = 'sample_test.txt'; H = dfaedit(file_name,1,1,1) end function [H]=dfaedit(file_...

11 Tage ago | 0

Answered

How can you change the bounds used by a solver with each iteration?

Use "fmincon" instead of "lsqnonlin" and change the bounds in "nonlcon".

How can you change the bounds used by a solver with each iteration?

Use "fmincon" instead of "lsqnonlin" and change the bounds in "nonlcon".

11 Tage ago | 0

Answered

How to plot the graph of y=ax+b?

x=0:0.1:50; y=53.5*x-1354.5; plot(x,y)

How to plot the graph of y=ax+b?

x=0:0.1:50; y=53.5*x-1354.5; plot(x,y)

11 Tage ago | 0

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Answered

Storing function outputs to an array so they can be plotted

A = 1:20; H_l = 2*(A+1); Sig_Lambda = 1*10^-9; I = A.*H_l*Sig_Lambda; plot(Lambda,I) works if Lambda is a sorted 1x20 ve...

Storing function outputs to an array so they can be plotted

A = 1:20; H_l = 2*(A+1); Sig_Lambda = 1*10^-9; I = A.*H_l*Sig_Lambda; plot(Lambda,I) works if Lambda is a sorted 1x20 ve...

11 Tage ago | 1

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Answered

how can i make a general matrix?

function main L = [1 2 0.1 0.2 0.02; ... 1 4 0.05 0.2 0.02; ... 1 5 0.08 0.3 0.03; ... 2 3 0.05 0.25 0.03; ... ...

how can i make a general matrix?

function main L = [1 2 0.1 0.2 0.02; ... 1 4 0.05 0.2 0.02; ... 1 5 0.08 0.3 0.03; ... 2 3 0.05 0.25 0.03; ... ...

11 Tage ago | 1

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Answered

Remove Zeros Matrix on 3D Matrix

function main val = rand(2,3,4) val(:,:,3) = [] end

Remove Zeros Matrix on 3D Matrix

function main val = rand(2,3,4) val(:,:,3) = [] end

11 Tage ago | 0

Answered

Plot the Poisson CDF with the Standard Normal Distribution CDF

I suspect the graphics shows that the arithmetic mean of normalized independent Poisson random variables converges in distributi...

Plot the Poisson CDF with the Standard Normal Distribution CDF

I suspect the graphics shows that the arithmetic mean of normalized independent Poisson random variables converges in distributi...

11 Tage ago | 0

Answered

how can i change the dimension of the matrix?

You must first decide where you want element (i,j,k) of the old matrix be placed in the new matrix. But usually MATLAB's "resha...

how can i change the dimension of the matrix?

You must first decide where you want element (i,j,k) of the old matrix be placed in the new matrix. But usually MATLAB's "resha...

11 Tage ago | 0

Answered

how to calculate a difference of function with any parameter

function main h = 1e-6; xleft = -pi; xright = pi; n = 200; dx = (xright-xleft)/n; x = xleft:dx:xright; chan...

how to calculate a difference of function with any parameter

function main h = 1e-6; xleft = -pi; xright = pi; n = 200; dx = (xright-xleft)/n; x = xleft:dx:xright; chan...

11 Tage ago | 0

Answered

Hi, I have an optimization question that should be solved with the constraints which are written. λ is a constant greater than one and ρ is total power budget that we have.

Solution is simple: rho1 = rho, rho2 = 0.

Hi, I have an optimization question that should be solved with the constraints which are written. λ is a constant greater than one and ρ is total power budget that we have.

Solution is simple: rho1 = rho, rho2 = 0.

11 Tage ago | 0

Answered

the projected distances between the line and edge A

You will have to check for correctness: % Project p1 on plane ABC (gives point p1-proj) Mat = [(B-A)*(B-A).' , (B-A)*(C-A).';(...

the projected distances between the line and edge A

You will have to check for correctness: % Project p1 on plane ABC (gives point p1-proj) Mat = [(B-A)*(B-A).' , (B-A)*(C-A).';(...

13 Tage ago | 0

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Answered

Coding a system of differential equations

Numerically solving the original system will make difficulties because of the singularity at t=0 for y. So let's first rewrite ...

Coding a system of differential equations

Numerically solving the original system will make difficulties because of the singularity at t=0 for y. So let's first rewrite ...

14 Tage ago | 0

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Answered

Product of vector elements where the vector has a large size

Product_V = exp(sum(log(V(1,:)))/numel(V))

Product of vector elements where the vector has a large size

Product_V = exp(sum(log(V(1,:)))/numel(V))

14 Tage ago | 0

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Answered

The output of ode45 does not make much sense

function main n0 = 1.0; %assume value for n(0) epsilonmax0 = 10; %assume value for epsilonmax x0 = ...

The output of ode45 does not make much sense

function main n0 = 1.0; %assume value for n(0) epsilonmax0 = 10; %assume value for epsilonmax x0 = ...

16 Tage ago | 0

Answered

Runge kutta 4 probelm

function main g = 9.81; m = 71; k = 1000; l_0 = 8; tstart = 0.0; tend = 10.0; h = 0.01; T = (tstart:h:te...

Runge kutta 4 probelm

function main g = 9.81; m = 71; k = 1000; l_0 = 8; tstart = 0.0; tend = 10.0; h = 0.01; T = (tstart:h:te...

17 Tage ago | 1

Answered

One of the constant input variable need to be changed based on previous step's output in ODE, Can anyone kindly help?

Either you insert some delay elements (PT1 or similar) or you have to solve a delay differential equation (e.g. using dde23).

One of the constant input variable need to be changed based on previous step's output in ODE, Can anyone kindly help?

Either you insert some delay elements (PT1 or similar) or you have to solve a delay differential equation (e.g. using dde23).

17 Tage ago | 0

Answered

Given an equation and data points, find the best fit coefficients of the equation

x = 0:5; y = [1 3 9 27 81 243]; A = [ones(6,1),exp(x.')]; b = y.'; a = A\b; f = @(x) a(1)+a(2)*exp(x); plot(...

Given an equation and data points, find the best fit coefficients of the equation

x = 0:5; y = [1 3 9 27 81 243]; A = [ones(6,1),exp(x.')]; b = y.'; a = A\b; f = @(x) a(1)+a(2)*exp(x); plot(...

17 Tage ago | 0

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Answered

Why is ySol(t) = Dsolve(ode,cond) wrong? What should it be instead?

syms Cs t y(t) ode = diff(y,t) == 40*Cs-40/280*y; cond = y(0) == Cs; ySol(t) = dsolve(ode,cond); ysol_num = subst(ySol,Cs,C)...

Why is ySol(t) = Dsolve(ode,cond) wrong? What should it be instead?

syms Cs t y(t) ode = diff(y,t) == 40*Cs-40/280*y; cond = y(0) == Cs; ySol(t) = dsolve(ode,cond); ysol_num = subst(ySol,Cs,C)...

18 Tage ago | 1

Answered

Utilizing the Euler Method

In the if-statement in Flight.m, set x3 to x(3,i-1) and calculate the other variables x4,x5,f,u1,u2,u3,V_ver,C_D,Cl and p only f...

Utilizing the Euler Method

In the if-statement in Flight.m, set x3 to x(3,i-1) and calculate the other variables x4,x5,f,u1,u2,u3,V_ver,C_D,Cl and p only f...

18 Tage ago | 0

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Answered

Anisotropic f coefficient for PDE solving

Maybe page 2-79 under http://uk.mathworks.com/help/pdf_doc/pde/pde.pdf ?

Anisotropic f coefficient for PDE solving

Maybe page 2-79 under http://uk.mathworks.com/help/pdf_doc/pde/pde.pdf ?

19 Tage ago | 0

Answered

how to solve this motion equation?

function main y0 = [0 pi/2 0 pi/2]; %[y1 y2 y3 y4]=[theta1 theta1dot theta2 theta2dot] tspan = [0 144*pi]; [T,Y] = ode...

how to solve this motion equation?

function main y0 = [0 pi/2 0 pi/2]; %[y1 y2 y3 y4]=[theta1 theta1dot theta2 theta2dot] tspan = [0 144*pi]; [T,Y] = ode...

19 Tage ago | 0

Answered

How can I solve this differential equation?

function main %% defining parameter P = [80;120;100;80;120;80;120;100;80;120;80;80;100;120;100]; % Pressure, bar T = [8...

How can I solve this differential equation?

function main %% defining parameter P = [80;120;100;80;120;80;120;100;80;120;80;80;100;120;100]; % Pressure, bar T = [8...

19 Tage ago | 0

Answered

Solve a system of ODEs with varying coefficients

function dyds_x = xcomp(sx, yx, s, kappa, tau) kappax = interp1(s,kappa,sx); taux = interp1(s,tau,sx); dyds_x = zeros(3,1);...

Solve a system of ODEs with varying coefficients

function dyds_x = xcomp(sx, yx, s, kappa, tau) kappax = interp1(s,kappa,sx); taux = interp1(s,tau,sx); dyds_x = zeros(3,1);...

19 Tage ago | 0

Answered

Euler and FD method

function main v=10^4; % cm/s D=2; %cm c=0.099; %cm^-1 b=0.097; %cm^-1 dx=1; %cm Diffrence for x dt=0.248; a=50; %cm ...

Euler and FD method

function main v=10^4; % cm/s D=2; %cm c=0.099; %cm^-1 b=0.097; %cm^-1 dx=1; %cm Diffrence for x dt=0.248; a=50; %cm ...

20 Tage ago | 0

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Answered

Problems with the application of Newton's method

function main %UNTITLED Summary of this function goes here % Detailed explanation goes here x0 = 20; maxiter = 200; tol =...

Problems with the application of Newton's method

function main %UNTITLED Summary of this function goes here % Detailed explanation goes here x0 = 20; maxiter = 200; tol =...

21 Tage ago | 1

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Answered

select a range of coefficients of a polynme

What do you mean by "gives me coefficient from 1" ? If you want to suppress the coefficient of x1^5, use c = coeffs(Polynome)...

select a range of coefficients of a polynme

What do you mean by "gives me coefficient from 1" ? If you want to suppress the coefficient of x1^5, use c = coeffs(Polynome)...

21 Tage ago | 0

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Answered

How to write the linear equations in the form of matrix

If you want it fast, you will have to define the matrix once by hand. Number the unknowns U1 = u_{0,0}, U2 = u_{0,1},...,U(N+1...

How to write the linear equations in the form of matrix

If you want it fast, you will have to define the matrix once by hand. Number the unknowns U1 = u_{0,0}, U2 = u_{0,1},...,U(N+1...

21 Tage ago | 0

Answered

Solving a system of ODEs whose coefficients are piecewise functions

function main T = []; Z = []; z0=[0.001 0.001]; tspan1 = [-10 -1]; iflag = 1; [t,z] = ode45(@(t,z) systode(t,z...

Solving a system of ODEs whose coefficients are piecewise functions

function main T = []; Z = []; z0=[0.001 0.001]; tspan1 = [-10 -1]; iflag = 1; [t,z] = ode45(@(t,z) systode(t,z...

22 Tage ago | 0

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