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Thiago Henrique Gomes Lobato


Last seen: 1 day ago
65 total contributions since 2019

Thiago Henrique Gomes Lobato's Badges

  • Knowledgeable Level 3
  • 3 Month Streak
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Answered
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...

6 days ago | 0

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Answered
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...

6 days ago | 0

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Answered
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 ...

6 days ago | 0

Answered
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...

6 days 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...

6 days 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 ...

6 days ago | 0

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Answered
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)

13 days ago | 0

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Answered
Legend not using correct colors
Your zeros(max_k) was a matrix, so each plot command made many plots and the legends went to the wrong place. Making it only ...

13 days ago | 2

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Answered
Numerically approximate the MLE by evaluating function
If you want to make sure -10 is not in the interval and still get equidistant points you could do something like this (it actual...

20 days ago | 0

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Answered
How to solve multivariable nonlinear optimization problem (fmincon or another optimization)
fmincon accepts a vector of variables, which means that as long as you pack all your variables in a vector x it doesn't matter i...

20 days ago | 0

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Index of a Column Vector
Just use brackets for the array index A = 1:7; A([1,2,6]) ans = 1 2 6

20 days ago | 0

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find array equal and put it in group?
This is one of the basic functionalites of the unique function, just do something like this: A = [1 0 0 0 0 0 1 0 0 1 ...

20 days ago | 1

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Answered
Create a function that interpolates matrix values
Yes, sure. Something like this should do the trick: % Your tabular function A = [1,2; 3,4]; % Your values x = 1....

20 days ago | 0

Answered
Integrating a multivariate function (5 variables)
You first have to define what you want to plot it. This seems to be a function of w, so, for different w's you want to integrate...

20 days ago | 0

Answered
Image processing Sum Square Diffrence
What exactly is the problem you're having? If the idea is just o find a template in the image you can probably find better resul...

27 days ago | 0

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Answered
Finite explicit method for heat differential equation
You were actually pretty close, the main problem was that in the boundary condition you was exponentiating your index, not your ...

1 month ago | 1

Answered
Matrix Logical Indexing in If...else... construction
If you wanna check that a condition happens at least one time in an array you can use "any" elseif any(isinf(varargin{j})) || a...

1 month ago | 0

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Answered
coxphfit survival numerical issue
In your S0 variable for the 0.8 case the last non-zero value is 3.2114e-321, which is way lower than the maximum numerical accur...

1 month ago | 0

Answered
How to choose a ROI of an image and make rest transparent, then save it?
To write the image I has to be either a double normalized to 1 or a uint8 with values from 0 to 255, in your case you had double...

1 month ago | 0

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Answered
Python to Matlab interfacing
Matlab can easily call python functions from the command, check this link from mathworks that explain how you can call your own ...

1 month ago | 0

Answered
Graphing Confidence Intervals with upper and lower bounds
You were creating a picture for every loop iteration, and the plot function can't interpolate between points if you give them on...

1 month ago | 0

Answered
Neural Network - MLP
I'm not sure why you want to shorten the code, it is already vectorize and I don't believe it can go so much less than this. Jus...

1 month ago | 0

Answered
How to repeat monthly data over several years?
Matlab has a function for concatenating values in different dimensions, you could solve your problem like this: A = randn(144,1...

1 month ago | 0

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Answered
Generate normally distributed sample from data
I need to be careful to not start any discussion about how one actually define a normal distribution, but starting from the poin...

1 month ago | 0

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Answered
Where are the bugs for this ODE finite difference problem that solve using Newton Raphson method?
I didn't check exactly your FEM implementations but one thing that I quickly noticed is that the Newton-Rapson is an iteractive ...

2 months ago | 0

Answered
How do I create a loop for this expression?
Those modifications fix your code. Your fogot the actually equation in the iteration and had some variables misplaced. a=input...

2 months ago | 0

Answered
I'm trying to make a game and need some help
I would maybe advise you to use somehting like Unity to create your game since Matlab is more to perform numerical computations....

2 months ago | 0

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how to combine two image to get one image
This should do what you want: I = imread('cameraman.tif'); I2 = imresize(rgb2gray(imread('onion.png')),[size(I,1),size(I,2)])...

2 months ago | 0

Answered
fill a boundary region with white colour
You can transform the contourns in a binary image, fill it and than translate it back to your original image. Here is an example...

2 months ago | 1

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Answered
how to join highlighted points by curve in 3D
For you to join those points with a radius that will gradually increase you first need to define what exactly is "gradually incr...

2 months ago | 1

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