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Jose Marques
Petrobras / UFSJ
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Youtube channel: https://www.youtube.com/channel/UC2WovW85lxhSQndD97lPaSA
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How to select the number of samples to train a Machine Learning algorithm?
I working in a dataset of 12000 samples concerning about 5 years of an industrial process. It is likely that during this ti...
5 years 前 | 1 个回答 | 0
1
个回答提问
Error when trying to do 'Hyperparameter Optimization' using Parallel Computing
Hello, I am trying to optimize the function fitrsvm. But when I set 'true' to the 'UseParallel' property, I am getting a e...
6 years 前 | 1 个回答 | 0
1
个回答提问
PI (Plant Information) system from OSIsoft integration
Does anyone already integrated the PI (plant information) system (PIMS of OSIsoft) with MATLAB? I intend to use the Machine Lear...
6 years 前 | 1 个回答 | 0
1
个回答提问
Setting the best training / validation ratio in a Neural Network
I am using a Neural Network to make a regression, using 10% of data to test. But how can I set the ratio values of training and ...
6 years 前 | 1 个回答 | 0
1
个回答提问
100% precision in training set with SVM classifier
<</matlabcentral/answers/uploaded_files/108243/Gr%C3%A1fico%20treinamento%20com%20e%20sem%20ru%C3%ADdo%20_%20mao.png>> Hello!...
6 years 前 | 0 个回答 | 0
0
个回答提问
Clustering and feedforwardnet giving always the same result
Hello! I am having some problems with clustering and feedforwardnet. The idea is compare these methods and improve the accuracy ...
6 years 前 | 0 个回答 | 0
0
个回答已回答
How to display multiple images side by side and on top/bottom of each other?
Try to use subplot. <https://www.mathworks.com/help/matlab/ref/subplot.html>
How to display multiple images side by side and on top/bottom of each other?
Try to use subplot. <https://www.mathworks.com/help/matlab/ref/subplot.html>
6 years 前 | 0
已回答
Applying Threshold to Video Pixels
Try to transform the image in a double matrix. readFrame gives a uint8 output.
Applying Threshold to Video Pixels
Try to transform the image in a double matrix. readFrame gives a uint8 output.
6 years 前 | 0
已回答
Matlab cannot recognize kinect
Hello. I tested Kinect at several MATLAB versions. Just work in MATLAB 2013.
Matlab cannot recognize kinect
Hello. I tested Kinect at several MATLAB versions. Just work in MATLAB 2013.
6 years 前 | 0
已回答
Using a while loop to determine and display the number of terms it takes for a given series to converge within 0.01% of its exact value ((pi^2)/6)?
In the first iteration, seem that nn == 0 and nn_sum == (1/nn^2) which means a zero division. Maybe you can include a if stateme...
Using a while loop to determine and display the number of terms it takes for a given series to converge within 0.01% of its exact value ((pi^2)/6)?
In the first iteration, seem that nn == 0 and nn_sum == (1/nn^2) which means a zero division. Maybe you can include a if stateme...
6 years 前 | 0
已回答
Custom neural network - input mismatch
Please, verify the order of elements. Maybe you can try to transposte the inputs matrix.
Custom neural network - input mismatch
Please, verify the order of elements. Maybe you can try to transposte the inputs matrix.
6 years 前 | 0
已回答
How to find a symbolic derivative?
Use diff function: syms f(x) f(x) = sin(x^2); df = diff(f,x) Result: df(x) = 2*x*cos(x^2) <https://www.m...
How to find a symbolic derivative?
Use diff function: syms f(x) f(x) = sin(x^2); df = diff(f,x) Result: df(x) = 2*x*cos(x^2) <https://www.m...
7 years 前 | 0
已回答
I do not have any licenses associated with your MathWorks Account.
You can use this version. It is a free Matlab Trial for 30 days. <https://www.mathworks.com/programs/trials/trial_request.htm...
I do not have any licenses associated with your MathWorks Account.
You can use this version. It is a free Matlab Trial for 30 days. <https://www.mathworks.com/programs/trials/trial_request.htm...
7 years 前 | 0
已回答
How to solve Index exceeds matrix dimensions?
Have you verify the size of the images? They must be the same.
How to solve Index exceeds matrix dimensions?
Have you verify the size of the images? They must be the same.
7 years 前 | 0
已回答
Separating Connected Objects Effectively in Image
Hello. Have you tried "imopen"? <https://www.mathworks.com/help/images/ref/imopen.html> Please, post your code and figures...
Separating Connected Objects Effectively in Image
Hello. Have you tried "imopen"? <https://www.mathworks.com/help/images/ref/imopen.html> Please, post your code and figures...
7 years 前 | 0
已回答
How to know the response time of a system in simulink?
For the response to a step input: step(sys); For the response to a ramp input: ramp(sys); where sys is the syste...
How to know the response time of a system in simulink?
For the response to a step input: step(sys); For the response to a ramp input: ramp(sys); where sys is the syste...
7 years 前 | 0
提问
Missing properties of Kinect 360 V1 Matlab 2017a - no TrackingMode, no Skeleton
Hello evereyone! Has anyone used the Kinect 360 v1 in Matlab R2017a? I have some troubles connecting Kinect 360 V1 with ...
7 years 前 | 2 个回答 | 0
2
个回答提问
Has anyone used the Kinect 360 v1 in Matlab R2017a?
It just appears few properties when I try to communicate with Matlab R2017a. The Kinect v1 works fine with the Matlab R2013a.
7 years 前 | 0 个回答 | 0
0
个回答已回答
Unexpected Matlab Expression ?
Natalie, try this: E= [-1 1] * 3 *( exp (1) .^ ((-x)/4)) E will be a matrix 1x2 that first element is positive value and...
Unexpected Matlab Expression ?
Natalie, try this: E= [-1 1] * 3 *( exp (1) .^ ((-x)/4)) E will be a matrix 1x2 that first element is positive value and...
7 years 前 | 0
| 已接受
已回答
Deleting sequence of igual values from a matrix
Hello Felipe. Try this: A = [0 0 0 1 1 1 2 2 2 3 3 3, 0 1 2 2 3 4 5 6 7 8 9 10]; [C, ia, ic] = unique(A(1,:)); C...
Deleting sequence of igual values from a matrix
Hello Felipe. Try this: A = [0 0 0 1 1 1 2 2 2 3 3 3, 0 1 2 2 3 4 5 6 7 8 9 10]; [C, ia, ic] = unique(A(1,:)); C...
7 years 前 | 1
| 已接受
已解决
Side of an equilateral triangle
If an equilateral triangle has area A, then what is the length of each of its sides, x? <<http://upload.wikimedia.org/wikipe...
7 years 前
已解决
Length of a short side
Calculate the length of the short side, a, of a right-angled triangle with hypotenuse of length c, and other short side of lengt...
7 years 前
已解决
Side of a rhombus
If a rhombus has diagonals of length x and x+1, then what is the length of its side, y? <<http://upload.wikimedia.org/wikipe...
7 years 前
已解决
Area of an equilateral triangle
Calculate the area of an equilateral triangle of side x. <<http://upload.wikimedia.org/wikipedia/commons/e/e0/Equilateral-tr...
7 years 前
已解决
Dimensions of a rectangle
The longer side of a rectangle is three times the length of the shorter side. If the length of the diagonal is x, find the width...
7 years 前
已解决
Area of an Isoceles Triangle
An isosceles triangle has equal sides of length x and a base of length y. Find the area, A, of the triangle. <<http://upload...
7 years 前
已解决
Find a Pythagorean triple
Given four different positive numbers, a, b, c and d, provided in increasing order: a < b < c < d, find if any three of them com...
7 years 前
已解决
Is this triangle right-angled?
Given three positive numbers a, b, c, where c is the largest number, return *true* if the triangle with sides a, b and c is righ...
7 years 前
已解决
Triangle sequence
A sequence of triangles is constructed in the following way: 1) the first triangle is Pythagoras' 3-4-5 triangle 2) the s...
7 years 前
已解决
Length of the hypotenuse
Given short sides of lengths a and b, calculate the length c of the hypotenuse of the right-angled triangle. <<http://upload....
7 years 前