Titus Edelhofer
MathWorks
MATLAB user since 1992 and working for MathWorks since 2001.
Consulting Manager in Germany.
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Content Feed
Solved
Create a cell array out of a struct
Create a cell array out of a (single) struct with the fieldname in the first column and the value in the second column: in: ...
14 días ago
Solved
How many trades represent all the profit?
Given a list of results from trades made: [1 3 -4 2 -1 2 3] We can add them up to see this series of trades made a profit ...
5 meses ago
Solved
Find a subset that divides the vector into equal halves
Given a vector x, return the indices to elements that will sum to exactly half of the sum of all elements. Example: Inpu...
5 meses ago
What is the input of the function trim('sys')?
sys is the name of a Simulink model The doc says "Consider a linear state-space system modeled using a State-Space block". So ...
6 meses ago | 1
| accepted
Load a file from a different folder
Hi Jasper, I don't know where uipickfile comes from. If you use uigetfile, you would have a second output argument you can us...
6 meses ago | 0
Solved
Convert a structure into a string
Convert the contents of each fields into a string. Example with an input structure s with 2 fields : s.age = '33' s....
alrededor de 2 años ago
Solved
Piecewise linear interpolation
Given an Mx2 vector and a row of M-1 integers, output a two column vector that linearly interpolates Y times between each succes...
alrededor de 2 años ago
How can I round double-values down in a Matlab function block in Simulink?
Hi, strange: floor should indeed be your friend. The only thing I can imagine is that leftover_seconds is not a double but an...
alrededor de 2 años ago | 0
| accepted
How can i modify a model automatically which uses an excel file as an input when this excel file is modified (checksum is modified) ?
Hi Lamjed, does the entire Simulink model needs to be changed or only a block? If it's only a block you could mask the block an...
alrededor de 2 años ago | 0
unresolved external symbol error, while building in Visual Studio code made by coder.
Hi Sara, just to be sure: did you specify the dll as external reference, as described in the doc in "Specify External Depende...
alrededor de 2 años ago | 0
How to check a function input to be ptcloud object?
Hi Philipp, probably you are looking for the function "isa": function myfun(x) if ~isa(x, 'ptCloud') error('Input argume...
alrededor de 2 años ago | 1
| accepted
How to execute multiple optimized values for x according to n, using fmincon
Hi, there are a couple of things I don't understand: you say "x is a vector"? But you always start with x0=initial_guess, whi...
alrededor de 2 años ago | 0
| accepted
'fwrite' does not write 'char' variables in binary files
Hi, I'm not really sure if this is not working as it should. If you do the following: fid = fopen('foo.bin', 'wb'); fwrite(fi...
más de 2 años ago | 1
| accepted
How to plot xml file in matlab?
Hi, I guess you need to be a little more specific. The answer to your question is Read the xml file (e.g. using xmlread) Plot...
más de 2 años ago | 0
How to Execute Maltab Function Block Every X Seconds in Simulink?
Hi Andrew, you can achieve this by assigning a sample time: right click on the block, choose "Block Parameters (Subsystem)", ...
más de 2 años ago | 0
| accepted
plot-editing functionality does not exist in deployed apps
Hi, you can get some of the tools (zoom, pan) through using web figures, see e.g. here. Regards, Titus
más de 2 años ago | 1
S Function Builder - To implement existing C code
Hi Ravikiran, usually (as long as your working C code has no states) you simply put it into the "outputs" function of the S-f...
casi 3 años ago | 0
How to use 'mbuild' command to generate C/C++ dll ?
This has changed with R2014a, see <https://de.mathworks.com/matlabcentral/answers/128890-how-can-i-use-mbuild-to-compile-a-share...
casi 3 años ago | 0
| accepted
I want to know whether the Microsoft Access databases are not recognized by MATLAB R 2015b?
Hi, one problem might be the version you have: could it be that your R2009a was 32 Bit whereas your R2015b is 64Bit? In this ...
casi 3 años ago | 1
| accepted
How to fix index in a parfoor loop?
Hi Andreu, agreed, it looks as if this case could be handled. But it is fairly easy to work around this by separating the inn...
casi 3 años ago | 1
| accepted
How to rename several several .mat in a file with rename
Hi Solene, this should work names = {'Health', 'Practice', 'Taste', 'Test'}; for iName = 1:numel(names) for iFil...
casi 3 años ago | 2
| accepted
what is the difference between data store memory and goto-from blocks ?
Hi Noufal, the main difference is, that data store memory and read/write remove the dependency between reading and writing, i...
casi 3 años ago | 1
| accepted
Error in Integrator is not finite
Hi Mostafa, interesting that the error happens at time 4.0. This could indicate, that indeed something happens in your model ...
casi 3 años ago | 0
why the output of randn is different between serial and parallel loop if using function of RNG
Hi, interesting. There was one thing missing, namely, that the workers might use a different algorithm (designed to be for th...
casi 3 años ago | 0
| accepted
How can I create a best fit polynomial for my data?
Hi Syed, if I assume you have three (column) vectors x, y and Efficiency, then it's simply a linear regression problem: ...
casi 3 años ago | 1
Use Parfor to split a 4D matrix into several 3D matrices
Hi, I agree with OCDER: parfor will only do huge memory movements from the Client to the workers but I doubt you will get muc...
casi 3 años ago | 0
why the output of randn is different between serial and parallel loop if using function of RNG
Hi, the idea why the parallel rng gives different answers is, that a common use case is for Monte Carlo simulations with e.g....
casi 3 años ago | 0
Making an executable with input arguments using codegen
Hi, it's probably not a question of the code generation but your main file: you compile to an executable, so probably your co...
casi 3 años ago | 0
| accepted
How to delete rows from a cell array that do not satisfy a certain condition?
Hi, things get much easier, if you use arrays instead of individual variable names: % combine names and scores into a ta...
casi 3 años ago | 2
| accepted
Graph plotting of dy by dx
Hi Kabit, if you have only the data (I assume a time vector and the corresponding values), the simplest is to use the functio...
casi 3 años ago | 0
