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Jan Siegmund


Last seen: 3 månader ago
34 total contributions since 2020

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Answered
How do I use a class property validation function with a dynamic argument?
The problem is, that MATLAB classes only support constant arguments on property validation. However function arguments can be v...

5 månader ago | 0

| accepted

Question


How do I use a class property validation function with a dynamic argument?
In Matlab OOP, I wanna use a function like mustBeEqualSize(a,b) from the Examples on function property validation to validate a ...

5 månader ago | 1 answer | 0

1

answer

Question


Efficient number occurence count
I want to efficiently count the number of occurences of numbers between 1-numel(num) in a Matrix. I came up with two options for...

6 månader ago | 3 answers | 1

3

answers

Answered
How to put cell array in sprintf?
If using multiple different cells: %% Edited % var = {'a','b','c','d','e'}; % num = {1,2,3,4,5}; % s = strjoin(cellfun(@(v...

8 månader ago | 0

Answered
How to indicate that GUI is busy running?
Users that looked for a waitbar style solution should have a look at https://de.mathworks.com/help/matlab/ref/uiprogressdlg.html...

9 månader ago | 0

Answered
How to support default parameter in MATLAB FUNCTION ?
The Answers are not up to date. Modern MATLAB supports the arguments Block: function out = foo(in) arguments in(1...

10 månader ago | 4

Answered
Multiple numerics as one map key / Merge Objects based on parameters
The only keytype which can hold two doubles is the character key type. So one may use char as key type and then simply function...

10 månader ago | 0

| accepted

Question


Multiple numerics as one map key / Merge Objects based on parameters
I want to use two numerics as a single key for a map to merge similar objects of a class. How can I do that? My class looks lik...

10 månader ago | 1 answer | 0

1

answer

Answered
How do I convert a numerical vector into a comma-delimited string?
Here is another oneliner: strjoin(cellstr(num2str(n')),',') Testing all four types with a script n = randi(100,[1 100]); tic...

10 månader ago | 1

Answered
How do I limit the values in an array?
There is also a matlab function doing this: A = min(A,1); It takes A if A is the minimum of the two and 1 if 1 is the minimum ...

11 månader ago | 1

Answered
How to create a checkerboard matrix without inbuilt function.
For an even sized checkerboard: rows = 6; cols = 4; normal = repmat(eye(2,'logical'),[rows/2 cols/2]); % or inverted = repm...

11 månader ago | 0

Answered
How to write an efficient overloaded subsasgn?
I may have a solution but do not know if this covers all cases: classdef Subsasgntest properties val e...

11 månader ago | 0

| accepted

Question


How to write an efficient overloaded subsasgn?
I want to write a class which defines subsasgn. The class holds a numeric value val and the subsasgn should target val only. I ...

11 månader ago | 1 answer | 1

1

answer

Answered
combine columns with different lengths to create a matrix
If the input data is a cell array of column vectors, you might consider this: a = {ones(5,1) ones(8,1)}; %test data len = ma...

11 månader ago | 1

Answered
horzcat different size rows; zero padding
If the input data is a cell array of column vectors, you might consider this: a = {ones(5,1) ones(8,1)}; %test data len = max(...

11 månader ago | 0

Answered
Regex: How do I match an empty string?
Use regexp(a,'^$','emptymatch')

11 månader ago | 0

| accepted

Question


Regex: How do I match an empty string?
Consider the following string: a = ''; How can I match it using regexp?

11 månader ago | 1 answer | 0

1

answer

Question


Override subsasgn of MATLABs double?
Consider the following statement: x = [1 2;3 4]; y = myclass([5 6]); x(1:2) = y MATLABs default behavior is: x(1:2) = ... r...

12 månader ago | 2 answers | 0

2

answers

Question


Does MATLAB call the double constructor on a=a+1?
I want to overload the double class and add some properties to it. And i also have to override the plus function. A similar cod...

12 månader ago | 1 answer | 0

1

answer

Answered
[Fixed Point Converter] 1000 bit fraction length at 2^x if x is loaded from .mat file?
A temporary fix is using bitsll as recommended here: For efficient HDL code generation, use the Fixed-Point Designer ...

ungefär ett år ago | 0

| accepted

Question


[Fixed Point Converter] 1000 bit fraction length at 2^x if x is loaded from .mat file?
I got a problem with code like this in the fixed-point converter: dut_tb.m dut(8); dut.m function out = dut(in) S = cod...

ungefär ett år ago | 2 answers | 0

2

answers

Answered
[HDL Coder] Ridiculous RAM usage + How to activate parallel processing?
This memory usage is not sane and it is the result of not properly optimized MATLAB code for HDL conversion. I tried to run code...

ungefär ett år ago | 1

| accepted

Answered
Odd and even numbers
Fancy answer: m = [1 2 3;4 5 6]; isodd = bitget(m,1) however this is slower as rem

ungefär ett år ago | 0

Question


[HDL Coder] Bug: Fixed point converter does not descend into System Objects
Can I somehow tell the fixed point converter to explicitly convert a certain function? This would temporarily fix the following ...

ungefär ett år ago | 1 answer | 0

1

answer

Question


[HDL Coder] Ridiculous RAM usage + How to activate parallel processing?
On my project, the HDL Coder uses ridiculus amounts of RAM. On my 8GB Windows 10 Notebook, it chews through it until after 3min ...

ungefär ett år ago | 1 answer | 0

1

answer

Answered
[Coder] Which types are supported for constant folding?
I did understand constant folding wrong: I thought one must help the coder as follows: a = coder.const(my_prod(3,2)); , becau...

ungefär ett år ago | 0

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Answered
Fixed point converter: Ignore code part.
Ignoring a code part in fixed point converter is currenty(R2019b) not supported. Comment out the section as a temporary fix.

ungefär ett år ago | 0

| accepted

Answered
[HDL Coder]: BUG?/ Function Location missing in Error Report -> find variable by name?
As long a the location of error lines is not shown correctly in MATLAB HDL Coder, assign the top function call as a var = cod...

ungefär ett år ago | 0

| accepted

Question


[HDL Coder]: BUG?/ Function Location missing in Error Report -> find variable by name?
In HDL Coder, I want to locate, where errors are occuring. But the HTML Report just gives me the Error Location in the top comp...

ungefär ett år ago | 3 answers | 0

3

answers

Answered
running matlab using command line
For R2019 users: -nodisplay & -nodesktop do not exist. Use: matlab -batch "Main; exit"

ungefär ett år ago | 3

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