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Shadow on xy plane of line in plot3?
use surfc function but you need a grid in x and y directions

etwa 4 Jahre vor | 0

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Least squares regression to find coefficients
one solution is: [length(x) sum(x); sum(x) sum(x.^2)]\[sum(y) ; sum(x.*y)]

etwa 4 Jahre vor | 0

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How to plot this eqaution
t=0:.001:1.0; s4 = cos(80*pi*t-10*pi).*(t>0.5 && t<=1.0);

etwa 4 Jahre vor | 1

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how can we solve non-linear equations like this via MATLAB, I am trying to solve it by using following program but it shows error, shown below in the pic? Thanks in advance.
eqns = [2*u + v == 0, u - v == 1]; S = solve(eqns,[u v]) clear syms a1 a2 a3 a4 eqn1 = cos(a1)+cos(a2)+ cos(a3)+ cos(a4) ==3...

etwa 4 Jahre vor | 0

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Why is there a difference in the error when using "syms approach" and "@(x) approach" while defining functions in MATLAB?
Method 2 is an approximate method for finding the derivative of a function

etwa 4 Jahre vor | 0

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how can we solve non-linear equations like this via MATLAB, I am trying to solve it by using following program but it shows error, shown below in the pic? Thanks in advance.
You have used cos function and your equations are not linear.

etwa 4 Jahre vor | 0

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Writing data into a text file - fprintf
You should use variables like ReactionTime as global Use this code after the function definition: global ReactionTime cd Use ...

etwa 4 Jahre vor | 0

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How to generate a matrix with assigned probability?
% x is the probability of 1 % m rows and n columns A=binornd(1,x,n,m)'; % another random matrix A=binornd(1,x,n,m)';

etwa 4 Jahre vor | 1

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Index from one vector to different sized vector
% v1 the first vector % v2 the matrix [~, ~, i2] = intersect(v1, v2(:,1)); newMatrix = v2(t2,:);

etwa 4 Jahre vor | 0

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Roll a 6-sided die until you have rolled a total of 25 6's.
find(cumsum(randi(6,1,1000)==6)==25,1)

etwa 4 Jahre vor | 0

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calling a function in a different script.
One solution is that you can use this command at the top of the files that use 'r' global r; Just after function definition...

etwa 4 Jahre vor | 0

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Why does my code output answers in log?
Use double(solve([1000000==300*((((1+0.08/12)^(n+1)/(0.08/12)-1)))])) to solve this financial problem (interest rate)

etwa 4 Jahre vor | 1

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How to return an array to single value?
The size of x is different from G and Tamb

etwa 4 Jahre vor | 0

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Plotting functions using loop
lambda=1; gamma1=0.3; n=0:1:15; P1 = (lambda.^n)./(lambda+gamma1).^(n+1)); plot(n, P1);

etwa 4 Jahre vor | 0

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Negative indexing of an array
There is no non-positive indexing in Matlab. you can use x(end) for the last member, x(end-1) the member before the last membe...

etwa 4 Jahre vor | 0

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How i can write this in matlab in optimized form using intermediate variables????
sy = sin(y); asy = abs(sy); xt = x + tan(y); xtn = x + log(abs(tan(y))); tx = 2*x+sy^2; ot =1/3; R1 = abs(x)*xt/(50*x^2+as...

etwa 4 Jahre vor | 0

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How i can write this in matlab??? x=-1.75*10^-3; y=3.1*pi;
R1 = abs(x).*(x+tan(y))./(50*x.^2+abs(sin(y))).^(1/3)+(5*x.^2+abs(sin(y))).^2.2./(x.^2 .* (x+tan(y)).^4); R2 = sinh(sqrt(2*x+(s...

etwa 4 Jahre vor | 1

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Number of odd numbers in an array
function n = myNOdds(x) n = sum(mod(x,2)==1); end

etwa 4 Jahre vor | 1

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Output of a for loop
You can use this code: %%Acting Forces on the beam and position F2=(-4); x2=0.4; L=1; %Constant EI Assumed 100 kN.m^2 (fr...

etwa 4 Jahre vor | 0

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I'm trying to get a vector from a loop without doing the linspace function
vector = zeros(1,5); j = 1; for i = 0:1.25:5; vector(j) = i; j = j+ 1; end disp(vector)

etwa 4 Jahre vor | 0

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Graph line not showing
Several issues in your code: 1- it has only one point (use plot(x, y) ) 2- The angle should be in radians not degrees. For ang...

etwa 4 Jahre vor | 0

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How do I write the following in matlab ?
H1 = (x.*(1+x.^2).*(1+2*x).^2).^2.3 ./ log(abs(cot(y))) + (log(abs(cot(y)))-x) ./(x.*(1+x.^2).*(1+2*x).^2); R2 = sinh(sqrt(2*x+...

etwa 4 Jahre vor | 0

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Can you help me write the following in matlab ?
H1 = (x*(1+x^2)*(1+2*x)^2)^2.3 / -log(abs(tan(y))) + (-log(abs(tan(y)))-x) /(x*(1+x^2)*(1+2*x)^2); R2 = sinh(sqrt(2*x+(sin(y)^2...

etwa 4 Jahre vor | 0

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How do I write the following in matlab ?
H1 = (x*(1+x^2)*(1+2*x)^2)^2.3 / -log(abs(tan(y))) + (-log(abs(tan(y)))-x) /(x*(1+x^2)*(1+2*x)^2); R2 = sinh(sqrt(2*x+(sin(y)^2...

etwa 4 Jahre vor | 0

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Plot only equilateral triangles
figure, hold on e = 0.01; i=0; while i<= 10 x = rand(3,1); y = rand(3,1); c = rand(3,1); L1 = sqrt((x(2)-...

etwa 4 Jahre vor | 0

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Plot only equilateral triangles
figure, hold on e = 0.0001; i=0; while i<= 10 x = rand(3,1); y = rand(3,1); c =rand(3,1); L1 = sqrt((x(2)...

etwa 4 Jahre vor | 0

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How to enter multiple values for a single input in a function
Most Matlab functions are vector based. you should use .^ for vector based ^ and .* for vector based * So you function line loo...

etwa 4 Jahre vor | 0

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how do i store a variable out of my function?
The first line should be function x = create_array(N,M,row_orient) to return the generated matrix

etwa 4 Jahre vor | 1

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generalized eignvalues/eignvectors
If you multiply both sides by inv(D) we will have: B*w = inv(D) * A * B So you can use: [w, invD] = eig(B, A); D = inv(InvD)...

etwa 4 Jahre vor | 0

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Compute the summation of all elements square of matrix
% simply use sum(a(:))

etwa 4 Jahre vor | 0

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