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Andreas Apostolatos

Last seen: Today Active since 2020

Andreas holds a diploma in Applied Mathematics with specialization in Applied Mechanics and Statistics from the National Technical University of Athens. Andreas spent his semester abroad in Prague, Czechia, where he wrote his Diploma Thesis at the Chair of Mathematical Modeling at the Charles University in Prague. Due to his passion about numerical methods in engineering, Andreas completed master studies with honors in Computational Mechanics and doctoral studies with highest distinction in Computational Engineering at the Technical University of Munich.

Andreas currently works as an Application Support Engineer at MathWorks, where his special focus is on Statistics and Machine Learning, Deep Learning, Optimization, Partial Differential Equations, Coder products, Polyspace for C/C++ Code Verification among other. On the same time, Andreas teaches as visiting lecturer at the Technical University of Munich about data-driven computational engineering.

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Answered
weird latex-interpreter problem in annotation when adding one line to table
Hello everyone, This post is already a little bit old, but I would like to provide with some information in case somebody els...

21 giorni ago | 0

| accepted

Answered
Matlab Coder Code check fails with "Error calling ... This call-site expects more outputs than this function can supply"
As mentioned above, the issue gets resolved if you remove the declaration of the optimization options variable as 'persistent'. ...

28 giorni ago | 0

| accepted

Answered
NATIVE-DECLARATION generated by embedded coder wrong
Hi, I would like to follow-up on this question, in case someone else stumbles upon the same issue. For the <NATIVE-DECLARA...

circa 2 mesi ago | 0

Answered
Error solving piecewise system of equations
Hi Jeremy, Adding to the excellent recommendation of Walter, there is also the possibility to use function 'fsolve()' to solv...

circa 2 mesi ago | 0

Answered
How can I use a probability distribution object in a Stateflow chart?
Hi, Firstly please note that Simulink is under the hood generating and compiling code when you build and run a model. The Cod...

2 mesi ago | 0

Answered
How to install matlab in Manjaro Linux?
Hello, Each MATLAB release is only supported for a subset of Linux distributions. For instance, the list of the Linux distrib...

4 mesi ago | 0

Answered
Solve 2D Navier stokes Equation Deep Learning
Dear Chris, Function 'fullyconnect' returns only a single output argument, see the following documentation page for more info...

4 mesi ago | 0

| accepted

Answered
minimize tool bar lost
Hi Jose, Select the option "Layout" on the right of the toolstrip in the "HOME" tab, and then choose from the "SELECT LAYOUT...

5 mesi ago | 1

| accepted

Answered
How to multiply two symbolic matrices fully?
Hi Igor, I understand that you are seeking to have the components of the resulting matrix from the multiplication expanded. Y...

6 mesi ago | 0

| accepted

Answered
Objective function is returning undefined values at initial point. lsqcurvefit cannot continue.
Hi Eren, Welcome to the forum from me as well. The code snippet you shared cannot be executed because variable 'x' is nowh...

6 mesi ago | 0

Answered
Polyspace justifications added inside the code not available in generated polyspace reports
Hello everyone, The cause of the issue was that the code annotation was added one line above the line of code that resulted i...

6 mesi ago | 0

| accepted

Answered
problem using 'Solve' (return only 1 solution)
Hi Marco, It is not clear how you define expression 'equazione_gamma', but by reverse engineering your call to function 'root...

6 mesi ago | 1

| accepted

Answered
Pareto set for 2D functions
Hi Laura, You are on the right path, but I would have some recommendations for you accordingly: 1.) When using function 'f...

7 mesi ago | 1

| accepted

Answered
hs923a function for Monte Carlo Approx
Hello, Function 'halton' does not appear to be a built-in MATLAB function. However, there is below a link to a custom MATLAB ...

8 mesi ago | 0

Answered
plotting logarithmic and linear scale
Hello, You can use function 'semilogy' for your needs, please visit the following documentation page accordingly, https://...

8 mesi ago | 1

| accepted

Answered
Obtaining accurate derivatives using Symbolic Math Toolbox
Hello, The evaluations of symbolic expressions that represent analytic derivatives in MATLAB are only governed by round-off e...

8 mesi ago | 0

| accepted

Answered
Minimising coefficients using fminsearch, subject to normalisation condition
Hello, You have an optimization problem at hand, where the objective function is subject to two sets of equality constraints....

8 mesi ago | 1

Answered
How to substitute x by an integer in a derivative function
Hello, To evaluate symbolic expression 'a' at 'x = 1' you can use function 'subs', namely, a_at_1 = subs(a, 1); I am no...

8 mesi ago | 2

| accepted

Answered
monte carlo random number generation
Hello, It seems that what you are seeking for can be utilized using function 'randsample' when using the variant that takes a...

8 mesi ago | 1

| accepted

Answered
truss problems warning RCOND
Hello, As John mentioned before, your stiffness matrix 'T' is most likely incorrectly computed. Using the latter system th...

10 mesi ago | 1

| accepted

Answered
How to find indices of certain values from dataset using a loop
Hello, You can use the following code snippet for your purposes: clear; data = readtable('kNN_300_y_pred_wd XYZValue + la...

10 mesi ago | 0

| accepted

Answered
Why am I warned about defining variables in a nested function, when I don't?
Hello everyone, It appears so, that this warning does not persist for release R2019b and later releases when cell array 'ind...

circa un anno ago | 5

| accepted