Answered

Fimplicit not plotting properly

fun1=@(x,y) a.*x.^2+2*h.*x.*y+b*y.^2+2*g.*x+2*f.*y+c; a=2; h=0; b=0; g=3/2; f=1/2; c=7; fimplicit(fun1,[-3 2 -12 -5])

Fimplicit not plotting properly

fun1=@(x,y) a.*x.^2+2*h.*x.*y+b*y.^2+2*g.*x+2*f.*y+c; a=2; h=0; b=0; g=3/2; f=1/2; c=7; fimplicit(fun1,[-3 2 -12 -5])

alrededor de 2 meses ago | 1

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Answered

How to rotate a video 180 degrees?

vidName = 'xylophone.mp4'; vidPath = strcat(videosPathToBeEdited, vidName); V = VideoReader(vidName); % read the complete ...

How to rotate a video 180 degrees?

vidName = 'xylophone.mp4'; vidPath = strcat(videosPathToBeEdited, vidName); V = VideoReader(vidName); % read the complete ...

alrededor de 2 meses ago | 1

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Answered

How to loop function for a 2 column matrix

You do not need a loop - the distance function is vectorized and accepts vector-inputs. You simply need to use indexing to get w...

How to loop function for a 2 column matrix

You do not need a loop - the distance function is vectorized and accepts vector-inputs. You simply need to use indexing to get w...

alrededor de 2 meses ago | 1

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Answered

differential evalution code Error using * Inner matrix dimensions must agree.

@(x)sum((minus((x(1)),V).*sin(2.*pi.*x(2).*t+x(3)).^2))/n % ^ % | % ...

differential evalution code Error using * Inner matrix dimensions must agree.

@(x)sum((minus((x(1)),V).*sin(2.*pi.*x(2).*t+x(3)).^2))/n % ^ % | % ...

alrededor de 2 meses ago | 1

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Answered

Hi there, can anyone help me create a function which calculates the least amount of notes and coins needed for any amount entered in ATM please ?

You can treat it as an optimization problem - since intlinprog is used you can be sure to find optimal solutions: Amount = inpu...

Hi there, can anyone help me create a function which calculates the least amount of notes and coins needed for any amount entered in ATM please ?

You can treat it as an optimization problem - since intlinprog is used you can be sure to find optimal solutions: Amount = inpu...

alrededor de 2 meses ago | 1

Answered

converting from integer time to datetime in 3-hourly data

Heres an approach: I believe the idea behind this: is that the integer values start counting by 1979-12-01 00:00 --> 0 19...

converting from integer time to datetime in 3-hourly data

Heres an approach: I believe the idea behind this: is that the integer values start counting by 1979-12-01 00:00 --> 0 19...

alrededor de 2 meses ago | 0

Answered

Stop Sign Detection Using Thresholding

There is a detailled example of a - you wont believe it - Stop Sign detector in the documentation here: https://de.mathworks.co...

Stop Sign Detection Using Thresholding

There is a detailled example of a - you wont believe it - Stop Sign detector in the documentation here: https://de.mathworks.co...

alrededor de 2 meses ago | 0

Answered

problem with plotting a 1D graph

You dont save the results of find anywhere - try: % plot of time : U(5,6,t) t=linspace(0,2,0.15); for i=1:np % np number o...

problem with plotting a 1D graph

You dont save the results of find anywhere - try: % plot of time : U(5,6,t) t=linspace(0,2,0.15); for i=1:np % np number o...

alrededor de 2 meses ago | 0

Answered

Fmincon Errors with objective function definition

Try: x0 = [0 0]; LB = [-5 -5]; UB = [7 7]; ii = 1; for jj = 0:0.01:1 xopt(ii,:) = fmincon(@funhw2q1, x0, [], [], [],...

Fmincon Errors with objective function definition

Try: x0 = [0 0]; LB = [-5 -5]; UB = [7 7]; ii = 1; for jj = 0:0.01:1 xopt(ii,:) = fmincon(@funhw2q1, x0, [], [], [],...

alrededor de 2 meses ago | 2

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Answered

Particle size measurement from SEM image

You can use the imfindcircles function (example here) which gives back the radii of detetcted circles in combination with houghl...

Particle size measurement from SEM image

You can use the imfindcircles function (example here) which gives back the radii of detetcted circles in combination with houghl...

alrededor de 2 meses ago | 0

Answered

System of differential equations with many input arguments.

Try: % l stands for \tau, u for \Theta, v for a, o for b (from utility) and j for ΞΎ syms S(t) P(t) c(t) h(t) z(t) A b d e g k ...

System of differential equations with many input arguments.

Try: % l stands for \tau, u for \Theta, v for a, o for b (from utility) and j for ΞΎ syms S(t) P(t) c(t) h(t) z(t) A b d e g k ...

alrededor de 2 meses ago | 0

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Answered

How can I solve an equation with more than one variable?

You can solve for all cases in one calculation and save teh result as a matrix by using a function handle: G=44*10^3; b=2.95e-...

How can I solve an equation with more than one variable?

You can solve for all cases in one calculation and save teh result as a matrix by using a function handle: G=44*10^3; b=2.95e-...

alrededor de 2 meses ago | 0

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Answered

median line in the histogram of the image

A = randn(100,1) histogram(A) xline(median(A),'-r','LineWidth',2)

median line in the histogram of the image

A = randn(100,1) histogram(A) xline(median(A),'-r','LineWidth',2)

alrededor de 2 meses ago | 1

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Answered

Index exeeded error for ode45 function

This is an ode of order 4 - so odeToVectorField will reformulate it to a system of 4 ode with order 1: >> pretty(V) / ...

Index exeeded error for ode45 function

This is an ode of order 4 - so odeToVectorField will reformulate it to a system of 4 ode with order 1: >> pretty(V) / ...

alrededor de 2 meses ago | 1

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Answered

Help with creating a certain 16x16 Matrix

Hint: read about the function zeros and ones and also about array indexing.

Help with creating a certain 16x16 Matrix

Hint: read about the function zeros and ones and also about array indexing.

alrededor de 2 meses ago | 0

Answered

Merge different excel files into one big matrix with a loop

Here is how to start with this: https://de.mathworks.com/help/matlab/import_export/process-a-sequence-of-files.html If the fil...

Merge different excel files into one big matrix with a loop

Here is how to start with this: https://de.mathworks.com/help/matlab/import_export/process-a-sequence-of-files.html If the fil...

alrededor de 2 meses ago | 0

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Answered

Inserting Elements in middle of 1-D, 2-D, N-D Array

This may help https://de.mathworks.com/help/matlab/ref/griddedinterpolant.html X = [ 1.0 2.0 3.0 4.0 5.0 6.0 7....

Inserting Elements in middle of 1-D, 2-D, N-D Array

This may help https://de.mathworks.com/help/matlab/ref/griddedinterpolant.html X = [ 1.0 2.0 3.0 4.0 5.0 6.0 7....

alrededor de 2 meses ago | 0

Answered

Solver stopped prematurely. fmincon stopped because it exceeded the function evaluation limit, options.MaxFunctionEvaluations = 3.000000e+03.

You have to give the options to the solver and to insert the MaxFunctionEvaluations Option into the optimoptions struct: MyValu...

Solver stopped prematurely. fmincon stopped because it exceeded the function evaluation limit, options.MaxFunctionEvaluations = 3.000000e+03.

You have to give the options to the solver and to insert the MaxFunctionEvaluations Option into the optimoptions struct: MyValu...

alrededor de 2 meses ago | 0

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Answered

Hi everyone! How do i want to plot graph the graph for this values?

To plot single points use scatter: x = 5 y = 2 scatter(x,y) plot can not visualize single points, but vectors: x = 5:10 y ...

Hi everyone! How do i want to plot graph the graph for this values?

To plot single points use scatter: x = 5 y = 2 scatter(x,y) plot can not visualize single points, but vectors: x = 5:10 y ...

alrededor de 2 meses ago | 0

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Answered

Error using dde23 : Derivative and history vectors have different lengths.

You did not define your constants - i took some fake values for them. n and T are unused. Also for good reasons, try to avoid gl...

Error using dde23 : Derivative and history vectors have different lengths.

You did not define your constants - i took some fake values for them. n and T are unused. Also for good reasons, try to avoid gl...

alrededor de 2 meses ago | 0

Answered

Is it possible to vectorize this loop?

w_new = (sum(w + A.*B(:),2))';

Is it possible to vectorize this loop?

w_new = (sum(w + A.*B(:),2))';

alrededor de 2 meses ago | 0

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Answered

How can I solve this BVP problem which is second-order ODE with variable coefficient?

Your function handle appears to be incorrect: syms y(x) eq = diff(y,x,2) + ((1-10*x^2)/x)*diff(y,x,1) == 0; [V,S] = odeToVect...

How can I solve this BVP problem which is second-order ODE with variable coefficient?

Your function handle appears to be incorrect: syms y(x) eq = diff(y,x,2) + ((1-10*x^2)/x)*diff(y,x,1) == 0; [V,S] = odeToVect...

alrededor de 2 meses ago | 0

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Answered

Error using odearguments (line 93) must return a column vector

Add this line in your ode function at the last line: NameOfYourOutputVariable = NameOfYourOutputVariable(:); This should...

Error using odearguments (line 93) must return a column vector

Add this line in your ode function at the last line: NameOfYourOutputVariable = NameOfYourOutputVariable(:); This should...

alrededor de 2 meses ago | 0

Answered

Error using odearguments (line 93) BANANA must return a column vector.

You make a vector of R1 with size 1x391 in the BANANA function. Thus you have a vector of 1x391 as result - one entry for every ...

Error using odearguments (line 93) BANANA must return a column vector.

You make a vector of R1 with size 1x391 in the BANANA function. Thus you have a vector of 1x391 as result - one entry for every ...

alrededor de 2 meses ago | 0

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Answered

How to solve Error - Index in position 1 is invalid. Array indices must be positive integers or logical values.

A1 = load('Mtxj_FULL_ASCENDING.txt'); A2 = load('Mtxj_FULL_DESCENDING.txt'); B1 = load('N2j1c_FULL_ASCENDING.txt'); B2 = load...

How to solve Error - Index in position 1 is invalid. Array indices must be positive integers or logical values.

A1 = load('Mtxj_FULL_ASCENDING.txt'); A2 = load('Mtxj_FULL_DESCENDING.txt'); B1 = load('N2j1c_FULL_ASCENDING.txt'); B2 = load...

alrededor de 2 meses ago | 1

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Answered

Solving a matrix equation with a parameter in the coefficient matrix

syms theta S F r = 0.025; h = 0.3; rho = 7850; g = 9.81; m = r^2 * pi * h * rho; phi = atan((0.15 - 0.15*sin(theta))/(0....

Solving a matrix equation with a parameter in the coefficient matrix

syms theta S F r = 0.025; h = 0.3; rho = 7850; g = 9.81; m = r^2 * pi * h * rho; phi = atan((0.15 - 0.15*sin(theta))/(0....

alrededor de 2 meses ago | 0

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Answered

How to solve this error while using ode15s.

%prob settings lb=[0 0 0 0 0 0 ]; ub= [100 120 1 100 110 20 ]; % parameters for differential evolution np=10; it=100; cr...

How to solve this error while using ode15s.

%prob settings lb=[0 0 0 0 0 0 ]; ub= [100 120 1 100 110 20 ]; % parameters for differential evolution np=10; it=100; cr...

alrededor de 2 meses ago | 0

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Answered

Curve fitting with custom equation, not using toolbox

This example shows how to curve fit with the inbuilt basic function <https://de.mathworks.com/help/matlab/ref/fminsearch.html |*...

Curve fitting with custom equation, not using toolbox

This example shows how to curve fit with the inbuilt basic function <https://de.mathworks.com/help/matlab/ref/fminsearch.html |*...

alrededor de 2 meses ago | 0

Answered

Minimize a function with 2 variables and 2 inequality constraints.

<https://de.mathworks.com/help/optim/ug/fmincon.html *|fmincon|*> appears to be the right choice for this. Note that you in fact...

Minimize a function with 2 variables and 2 inequality constraints.

<https://de.mathworks.com/help/optim/ug/fmincon.html *|fmincon|*> appears to be the right choice for this. Note that you in fact...

alrededor de 2 meses ago | 0

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