Answered
Find the work done for the force 𝐹⃗(x,y,z)= yz𝑖⃗ + xz 𝑗⃗ + (xy+2z) 𝑘⃗⃗ along the line segment from (1,0,-2) to (4,6,3)
https://www.youtube.com/watch?v=2OFvYo5aWXg

4 years ago | 0

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Answered
How I can determine the intersection point of two projectile
Set x1 = x2 and y1 = y2 for an intersection point of the two curves. You'll get xinter= (tan(theta2)-tan(theta1))/(g/(2*(v2*co...

4 years ago | 1

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Answered
how to write this in matlab?
result = sin(pi/2)^2 + tan(3*pi^2)

4 years ago | 0

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Answered
How to find a proper algorithm to solve this optimal control problem?
This should give you a start: %Optimal advertising expenditure in monopoly %% Constants p = 100; a = 0; b = 0.07; c = 0.04...

4 years ago | 0

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Answered
Need solution for this error
First get a fid to open your file: fid = fopen( filename )

4 years ago | 0

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Solving coupled Partial Differential Equations using method of Lines
For the pdepe version, better use function [pl,ql,pr,qr] = pdex2bc(zl,Cl,zr,Cr,t) Cin =[1 1 0 0]; % inital concentrations ...

4 years ago | 2

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Answered
Derivative of a function with constants
syms x a b c f = x*e^x*(a*x^2+b*x+c); df = diff(f,x)

4 years ago | 0

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I want to find the five unknown of a system of five nonlinear equations. Thank you !
function main x0 = rand(5,1); x = fsolve(@fun,x0) end function res = fun(x) k1 = x(1); k2 = x(2); k3 = x(3); k4 = x(4); ...

4 years ago | 0

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Errors while trying to setup equation for root finding.
function main a0 = 1; a = fzero(@fun,a0) end function res = fun(a) z_pdo = ...; k_pdo = ...; z_water = ...; ...

4 years ago | 0

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Why my graph is not the same as paper!!
clear all rlength =10; %meter dx = 0.0001; Numdata = rlength/dx; %constant value Cpf=0.707; %kcal/kg.K Cpg=0.719; %kcal/kg...

4 years ago | 1

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Answered
If I have 512 matrices (entries of each matrix is looping modulo 2), how the multiplication syntax for those 512*512 matrices ?
m = 9; justRows = dec2bin(0:2^m-1)-'0'; for i = 1:size(justRows,1) A = reshape(justRows(i,:),[3,3]); M{i} = A; end

4 years ago | 0

Answered
solve four variables 1111
function main A = input('1,2;3,5'); B = input('8,-1;3,7'); C = input('2,6;8,4'); a1=A(1,1); a2=A(1,2); a3=A...

4 years ago | 1

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using mat2cell
C = mat2cell(M.',ones(1,10)); % M is your 1001x10 numerical matrix

4 years ago | 0

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using runge kutta RK2 on matlab
function main f = @(x,y) 5-50*y; a = 0; b = 1; n = 100; h = (b-a)/n; y(1) = 0; i = 0; for x= a:h:b-h ...

4 years ago | 1

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How do I loop a fucntion over matrix columns and store the results in a column?
If R is your matrix: [m,n] = size(R); H = zeros(n,1); for i = 1:n r = R(:,i); H(i) = dfaedit(r ); end

4 years ago | 0

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Answered
Script matlab calculate vectors
syms a b c A = [a b c]; B = [-2 1 -4]; C = [1 3 2]; result = [5*a+6 3*b-2 -4*c+1]; AB = cross(A,B); AC = cross(A,C); S = ...

4 years ago | 0

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Answered
Using temperature and pressure data to estimate antoine coefficients for glycerol
antoine = @(b,T) 10.^( b(1) + b(2)./(T+b(3))); beta0 = [3.93737,1411.531,-200.566]; beta = nlinfit(T,p,antoine,beta0)

4 years ago | 1

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Find the value of x when the first derivative is equal to 0
x = -pi/2:0.01:pi/2; y = cos(x); dydx = diff(y)./diff(x); [~,idx] = min(dydx.^2); xmin = (x(idx+1)+x(idx))/2 xmin is the po...

4 years ago | 0

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Answered
How to calculate numerical integral with more than 3 variables in Matlab? ( > integral3 )
Which method is best-suited depends on the specific problem. Maybe https://de.mathworks.com/matlabcentral/fileexchange/47919-i...

4 years ago | 0

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Answered
MATLAB 2010 code not working in MATLAB2012a ?
The filename must be "testingfile.m" not "TestingFile.m" Or your function must be renamed in function [z,w] = TestingFi...

4 years ago | 1

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Function inside a for loop
An array of function handles is not possible. Instead, you should define s41_0 = @(a,T) a.*s_CO2(T) and evaluate it as val41...

4 years ago | 1

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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...

4 years ago | 0

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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)

4 years 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_...

4 years ago | 0

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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".

4 years ago | 0

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How to plot the graph of y=ax+b?
x=0:0.1:50; y=53.5*x-1354.5; plot(x,y)

4 years 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...

4 years 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; ... ...

4 years ago | 1

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Answered
Remove Zeros Matrix on 3D Matrix
function main val = rand(2,3,4) val(:,:,3) = [] end

4 years ago | 0

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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...

4 years ago | 0