David Franco
Federal University of Tocantins
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Industrial Engineer from the Pontifical Catholic University of Paraná (2008/2012) and Master in Production and Systems Engineering also from the Pontifical Catholic University of Paraná (2013/2015). PhD in Production and Systems Engineering at Pontifical Catholic University of Paraná (2015/2019). Works in the area of Production Engineering, with emphasis on Operations Research, sub-areas: Modeling, Analysis and Simulation of Productive Systems; Decision-making processes; Time Series Analysis and Forecasting; Intelligent Systems (Artificial Neural Networks); Mathematical Programming and Optimization (Linear, Integer, Mixed and Non-Linear Programming; Global Optimization: Genetic Algorithms, Simulated Annealing, Tabu Search, Direct Search, Multiobjective Optimization, Swarm Optimization, among other techniques); and Data Mining (Big Data).
MATLAB
Spoken Languages:
English, Spanish, Portuguese
Professional Interests:
Optimization, Statistics and Machine Learning Applications, Operations Research
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Legend for multiple data series at once
I am plotting 3 datasets (5x100 elements each) directly from the 5x100x3 matrix (I transposed the matrix to get a 100 points x 5...
etwa 2 Monate vor | 1 Antwort | 0
1
AntwortFrage
How to plot multiple time series cell arrays as a shadowed area
Hi guys! I have the following cell data (each column represents a different algorithm for comparison; each row represents a exp...
mehr als ein Jahr vor | 1 Antwort | 0
1
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Do I need to differentiate ARIMA model input data?
If my ARIMA model is (1,1,1), do I need to differentiate the data before inserting it into the model? sys = arima(1,1,1); Md1 ...
mehr als 3 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
Surrogate optimization with different size constraints
I have this problem for optimization (22-dimensional): Min sum(t1/x1,t2/x2,...,t22/x22) Subject to: x1 + x2 + ... + x22 -140...
fast 4 Jahre vor | 1 Antwort | 0
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Why is the Neural Network training slow when I don't use the Matlab Toolbox?
I am trying to optimize neural weights using the standalone Levenberg-Marquard algorithm, but the ANN training is much slower th...
etwa 4 Jahre vor | 0 Antworten | 0
0
AntwortenHow can I use the trained weights of a neural network
I found the answer (output and yy are equal): % Simulated a Neural Network clear close clc rng default [x,y] = sim...
mehr als 4 Jahre vor | 0
| akzeptiert
How to use weights and bias from Neural Network Toolbox for classification
I found the answer (output and yy are equal): % Simulated a Neural Network clear close clc rng default [x,y] = sim...
mehr als 4 Jahre vor | 0
| akzeptiert
Frage
How can I use the trained weights of a neural network
How can I use the trained weights of a neural network to simulate the output of a classification problem?
mehr als 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Matlab returns which epoch's weights of a Neural Network training?
If I trained my Neural Network until 10 iterations and my best validation epoch is 3, Matlab will return the weights from the 10...
mehr als 4 Jahre vor | 0 Antworten | 0
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Antworteni want to train neural network with nntool but input and target size donot match error occur
The input and targets must be 4x81 and 1x81. Use the transpose function.
mehr als 4 Jahre vor | 0
Which epoch is the training result of the train function
For a shallow neural network you can use the code: net.trainParam.max_fail = x where x is the number of fails in increase the ...
mehr als 4 Jahre vor | 0
Frage
How to use weights and bias from Neural Network Toolbox for classification
I found a code in Matlab Answers for regression: x = 0:0.1:10; % input dimension 1x101 y = sin(x); % output dimension 1x101 ...
mehr als 4 Jahre vor | 1 Antwort | 0
1
AntwortHow Matlab calculate the centroid of a polyshape?
From http://paulbourke.net/geometry/polygonmesh/: Where:
fast 5 Jahre vor | 0
| akzeptiert
Frage
How Matlab calculate the centroid of a polyshape?
I am using the centroid command to find the centroids of polyshapes, but on the documentation I didn't find how Matlab calculate...
fast 5 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to detect a dark color in RGB triplet?
I am plotting a map with many subdivision and colors. I would like to automatically draw the borders with contrasting color wit...
fast 5 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to partition (discretize) the space around points using Voronoi Diagram?
I have a problem: The plot shows a 399 cities locations and the Voroni Diagram (in latitude and longitude coordinates). The qu...
fast 5 Jahre vor | 1 Antwort | 1
1
AntwortFrage
How can I convert a shapefile boundaries to lat and lon?
I have a shapefile of counties subdivisions (Paraná State, Brazil) and I would like to extract an array of bounding lat and lon ...
fast 5 Jahre vor | 1 Antwort | 0
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AntwortHow to calculate the Euclidean distance beetwen all points of Latitude Longitude pairs?
function [d1,d2] = pos2dist(point1,point2) % Distance: % d1: distance in km based on Haversine formula % d2: distance in km b...
fast 5 Jahre vor | 0
| akzeptiert
Frage
How to calculate the Euclidean distance beetwen all points of Latitude Longitude pairs?
I have a 399 cities array with LON LAT coordinates (first column for the Longitudes), like the picture below. How can I calcu...
fast 5 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Better “centerpoint” than centroid of a concave polygon
I'm using the centroid of polygons to attach a marker in a map application. This works definitely fine for convex polygons and ...
fast 5 Jahre vor | 4 Antworten | 0
4
AntwortenFrage
How to find a figure's centroid inside a polyshape?
I have the following problem: I am plotting the boundaries of several municipalities and I need to list each one. As there are...
fast 5 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
How to plot text in mapshow map
I have this map I made using mapshow function: I used the data in this structure to create the map: My function is (I ne...
mehr als 5 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
Mathematical formulation of a operations research problem
How can I implement this objective function and its constraints in Matlab (p-median problem)? Thank you very much!
mehr als 5 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
How to plot the content of a Structure without using a for loop?
I need to plot the content of a *_structure_* fiel: <</matlabcentral/answers/uploaded_files/111837/Capture.PNG>> Each ...
fast 7 Jahre vor | 1 Antwort | 0
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Neural Network - How to use a custom training function
Is it possible to replace standard matlab training methods (like _*Gradient Descent*_, *_Levenberg-Marquardt_*, etc.) by other m...
fast 7 Jahre vor | 2 Antworten | 0
2
AntwortenHow can I plot a confusion matrix for a multi-class or non-binary classification problem?
Implementation code: Confusion Matrix function [] = confusion_matrix(T,Y) M = size(unique(T),2); N = size(T,2)...
fast 7 Jahre vor | 1
How can I vectorize a function?
Because of the above problems I'm using my own function with *|surfc|* to replace *|fsurf|*: function z = plotfcn(fcn,range...
fast 7 Jahre vor | 0
Difference between fsurf and ezsurf
*MathWorks' Support Response:* I have been able to reproduce the slow down that you were experiencing. The *|fsurf|* function...
fast 7 Jahre vor | 0
| akzeptiert
Frage
Difference between fsurf and ezsurf
I have a problem with |*fsurf*| command: When I use fsurf(@(x,y) ackleyfcn([x,y]),[-32 32 -32 32]) I got this warning...
fast 7 Jahre vor | 2 Antworten | 1
2
AntwortenFrage
How can I vectorize this function with nested FOR loop?
The function is: x = -10:10; y = -5:5; for j = 1:21 for i = 1:11 f(i) = - 20 * exp( - 0.2 * sqr...
fast 7 Jahre vor | 2 Antworten | 0
2
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