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Thiago Henrique Gomes Lobato

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87 total contributions since 2019

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how to find integration through period of time
You have a constant acceleration, you can simply use the basic equations of motion to calculate the velocity and distance: ...

3 days ago | 0

how to stop a loop at any time during the loop using ui?
A possible solution can be done like this: function gui fig = figure; ButtonHandle = uicontrol('Style', 'PushButton', ... ...

3 days ago | 0

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Needed SNR , PSNR, MSE, PSD matlab code for a ECG signal to recognize reconstructed ECG signal
You can use the periodogram function from matab.

3 days ago | 0

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How to write a matlab program to arrange my workspace data?
You could use the function sort to sort your arrays and get the index of the sorting, so you can apply this indexing to u and gi...

3 days ago | 0

heaviside and sign function
The heavside function is not the same as the sign function, you can't simply change one for another. If you want to write the si...

10 days ago | 0

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Plotting the set of all unit vectors in different norms efficiently?
Just make a meshgrid and convert it to a vector %X = randn(10000,2); step = 0.02; [Xi,Yi] = meshgrid(-1:step:1,-1:step:1); X...

10 days ago | 0

Combining separate graphs into one and changing the scale to match
You can do the first plot, plot the second one over it and then rescale the y axis to the values of the first plot (since the se...

10 days ago | 0

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How we can generate generate a noise signal from gauss distribution ??
the randn function in matlab is a gaussian distribution with variance 1. So you can generate a gaussian with mean x and variance...

10 days ago | 0

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How to compare the saved names of two images stored in different folders ?
You have a couple of errors in your code. Firstly to compare strings you must use the strcmp function, so if strcmp(first,last...

10 days ago | 1

How to achieve real-time graphics in MATLAB?
If you plot your ball in matlab and update the plots there it will never be exactly as fast as a real life example because you ...

17 days ago | 0

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Multi-target data optimization
Could you explain a little more the problem you're having? In the end it really doesn't matter if your matrix are functions or n...

17 days ago | 1

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2D color or surface plot based on 3 columns of data
Ideally you should have a perfect grid and them you can do this kind of plot. In your case, however, you have only scattered val...

17 days ago | 1

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Spectral Substraction for removing noise
Probably your signal is not long enough for you to use 2000 blocks of 350 samples, you can make your loop signal dependent to av...

23 days ago | 0

dot product between system of vectors
How you are getting these values for Q? If you calculate the dot product between the colums of the variables you give the values...

24 days ago | 0

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Bisection Method, Newtons method, fixed point, and Globally Convergent Newton's method
From your text I belive you actually want to plot the convergence of the methods. For this you need to save the errors for all i...

24 days ago | 0

why am i getting NaN from my function
As David said your log2(p) is not safe, you can solve this problem by using this line of code: Entropy = - sum(p.*log2(p+eps));...

24 days ago | 0

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connecting 2 object that separately but their location is close ?
You can use the imfill function from the image processing toolbox for such type of problems.

1 month ago | 0

surface plotting with complex function

1 month ago | 0

Minimisation of object function having 2d array as variables.
Any 2D array can be represented with a vector, which is the normal input to optimization functions, so all you need to do is wri...

1 month ago | 0

How do I implement friction into my script?
Friction is a force that produces acceleration which changes the velocity, so if you add an additional term to the velocity upda...

1 month ago | 0

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How to add a new column to several matrices
How you read your files? It should actually be very straight forward, something like this should help (Read it mosty as a pseudo...

1 month ago | 0

exp(-0/d0) equals 1, not 0, so I don't understand why you think the raw exp(-d/d0) would produce those results, since values wil...

1 month ago | 1

Speeding up a for loop
If you don't mind having 3 dimensional arrays something like this can be used rng(42) S1 = 5994; S2 = 88; S3 = 8; A = 100*r...

1 month ago | 0

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Rotate vector in row
This may solve your problem: rng(42) n= [1,19,15,18,21,10,16,2,7,3,17,6,1; 1,14,20,8,4,13,9,5,1,0,0,0,0; 1...

1 month ago | 0

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How can use parallel programming in the below code?
You can indeed try to do the code in parallel with a parfor loop in the "i" loop and some tweak in the eta2 variable bound like ...

1 month ago | 0

How to select different data points in different images in a loop?
I don't think a zeropad approach would be optimal, the main problem is that your vector can increase size every time as the same...

1 month ago | 0

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LONGEST PATH BY PRODUCT
You can take the log of your inverse matrix and use the log property: Which basically says that maximizing/minimizing the sum...

1 month ago | 0

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Having problem to change the value of extra parameters at each time step passed in ODE45 Solver
You can do it accurately only by doing partial integrations (make a loop in ode45 for the time steps) and changing the variable ...

1 month ago | 0

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How to calculte and plot this equation in matlab ,when T=(0-3000k)
T = 0:3000; X = @(T) 6.626e-34./sqrt(2*pi*9.11e-31*1.38e-23*T); figure,plot(X(T),T)

1 month ago | 0

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