Community Profile

Andreas Apostolatos

Last seen: 1 dag ago Active since 2020

Andreas holds a Diploma in Applied Mathematics with specialization in Applied Mechanics and Statistics from the National Technical University of Athens. Currently, Andreas applies his expertise as a Senior Application Engineer in Education at MathWorks, where he supports academics using state-of-the-art MathWorks solutions for their teaching and research activities, while also engaging in the preparation of high-quality courseware for science and engineering disciplines. Moreover, Andreas is also an active lecturer at the Technical University of Munich where he applies modern teaching methods, such as Inverted Classroom and Project-Based Learning (PBL).

Spoken Languages:
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Courseware-on-Finite-Element-Methods

How do you take the partial derivative of a function relative to theta dot
Hi Cason, You can achieve this workflow by substituting the symbolic expression diff(theta1) with a symbolic variable theta1d...

ongeveer een jaar ago | 1

| accepted

Gaussian quadrature with change of variables
Hi Melanie, There are serveral submissions on File Exchange that you can use to compute integrals using the Gauss Quadrature ...

ongeveer een jaar ago | 0

calculate the classification accuracy after training a "pretrained model"
Hi Rayan, From the code snippet you share it appears that you are training a neural network for classification while you are ...

meer dan een jaar ago | 1

| accepted

how can i validate my optimization algorithm?
Hi Harsh, From your description I understand that your cost function f depends on (x,y), namely f = f(x,y) and that f(10, 20)...

bijna 2 jaar ago | 0

Can matlab work with rosetta?
Hi, MATLAB interfaces smoothly to Python, see the following documentation page, https://www.mathworks.com/products/matlab/...

bijna 2 jaar ago | 0

Configure Matlab for GIT on Windows
Hi Rocco, The step of installing Cygwin and adding it to the MATLAB library path is just an optional step in case you want to...

bijna 2 jaar ago | 2

| accepted

Eig Argument Command Error
Hi, The issue here is that you are defining matrices K and M as symbolic matrices, whos K M Name Size B...

bijna 2 jaar ago | 0

Not Enough Input Argument Error
Hi, It is yet not clear what kind of error you are receiving, since you have not shared it with us. However I understand that...

bijna 2 jaar ago | 0

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Why program shows Unrecognized function or variable 'g'.
Hi, In the following call of your code snippet, plot(x,y,'bd-',x,h,'g:',x,w,'ro-',x,g,'c^-'); you are trying to plot va...

bijna 2 jaar ago | 1

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I would like to run Matlab on Centos 8. is there any way?

ongeveer 2 jaar ago | 0

Regression Learner and 1 layer Neural Network Model parameters
Hi, The source of the discrepancy in this case comes from the fact, that you are performing the "manual" forward pass without...

ongeveer 2 jaar ago | 1

| accepted

Interactive brushing across multiple scatter-plots on the same dataset (data relation given not by a common x-axis but just by the dataset)
Hello, You can use the following code snippet for your needs, %% Just some viusally instructive, artificial sample data n...

ongeveer 2 jaar ago | 1

| accepted

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...

meer dan 2 jaar ago | 0

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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'. ...

meer dan 2 jaar ago | 0

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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...

meer dan 2 jaar ago | 0

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...

meer dan 2 jaar ago | 0

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...

meer dan 2 jaar ago | 0

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...

meer dan 2 jaar ago | 0

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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...

meer dan 2 jaar ago | 1

| accepted

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...

meer dan 2 jaar ago | 1

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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...

meer dan 2 jaar ago | 0

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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...

bijna 3 jaar ago | 0

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...

bijna 3 jaar ago | 0

| accepted

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...

bijna 3 jaar ago | 1

| accepted

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...

bijna 3 jaar ago | 1

| accepted

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 ...

bijna 3 jaar ago | 0

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

bijna 3 jaar ago | 1

| accepted