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Bill Tubbs


Last seen: circa un mese ago Active since 2020

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Answered
how to display the results from simulink in a table
I also prefer working with tables and csv files rather than mat files so I wrote a script to convert a Simulink SimulationOutput...

circa 2 mesi ago | 0

Question


Simulink vector index assignment / re-ordering using Selector block
I'm trying to merge two vector signals into one vector according to two sets of indices. For example: u_pos = [2 3 4]; du_p...

3 mesi ago | 1 answer | 0

1

answer

Answered
Find in a cell array?
Just in case someone comes here looking to do this with a cell array of chars as I was, it's quite easy this way: my_cell_array...

3 mesi ago | 2

Answered
How to add a parameter value to the icon of an S-function block
Based on the comments in response to Benjamin's answer, here is the complete and concise answer to the question: First create a...

3 mesi ago | 0

| accepted

Question


How to add a parameter value to the icon of an S-function block
I'm new to S-function blocks in Simulink but I've made a working S-function block and now I want to display a value on its icon....

3 mesi ago | 2 answers | 0

2

answers

Question


How to store structs and cell arrays of matrices in an S-function's Dwork memory.
I implemented a sophisticated multi-model process observer in MATLAB code using struct objects for convenience. Each struct has ...

4 mesi ago | 0 answers | 0

0

answers

Question


Find the minimums along 3rd dimension of an array
I have a 3d array that is constructed from two 2d arrays: a = [1 2 3; 4 5 6; 7 8 9]; b = [1 2 0; 4 0 9; 9 8 9]; c = cat(3,a,b...

6 mesi ago | 1 answer | 0

1

answer

Answered
Set Simulink model simulation stop time from m file
You can also do it by passing it as an argument when you run the simulation from the m file: sim_out = sim(sim_model, t_stop)

6 mesi ago | 1

Answered
Check for equality in the contents of two arrays ignoring order
I think this might be the answer for case 1 (A & B are sets): A = [1 3]; B = [3 1]; assert(isempty(setxor(A, B))) A = [1 3]; ...

7 mesi ago | 0

Question


Check for equality in the contents of two arrays ignoring order
I want to check that the contents of two arrays are equal, ignoring ordering of the elements. I couldn't find an existing answe...

7 mesi ago | 3 answers | 0

3

answers

Answered
Importing a Table :: [Variables are been modified by Matlab]
The answer by Steven Lord didn't work for me. I got this error: Error using readtable (line 198) Unknown Parameter 'VariableN...

8 mesi ago | 0

Answered
How to round numbers in tables?
Is here a way to use the round function with tables? Simply using round(my_table, 3) does not work: t = array2table(randn(3, 4...

8 mesi ago | 0

Question


Is it possible to sample multiple signals at different rates with the extendedKalmanFilter object?
I need to implement an extended Kalman filter in a MATLAB for loop and decided to use the extendedKalmanFilter object. This was ...

8 mesi ago | 0 answers | 0

0

answers

Answered
Efficiently calculate exponentially weighted moving averages of matrix?
I find the easiest way is to use a discrete filter. But the input data is in columns here not rows: x = [0 1 1 1 1; 0 0 1 1 1]...

10 mesi ago | 0

Question


How to index the values of an array using a series of rows, column indices?
Couldn't find an answer about this and it is not mentioned in the Matlab documentation page on array indexing. I want to know h...

11 mesi ago | 1 answer | 0

1

answer

Question


Efficient algorithm to compute only the most probable sequences of a random variable out of all possible sequences
I'm looking for a better way to compute the possible sequences of a random variable whos value at time k is given by. x(k) = 1 ...

11 mesi ago | 3 answers | 1

3

answers

Question


Waterfall plot not showing correctly
I think this is an undesirable feature of the waterfall plot function and I'm posting it here so that others don't spend as long...

11 mesi ago | 0 answers | 0

0

answers

Question


Special characters in m-file comments are being removed/replaced
I've noticed that special charactes such as 'Γ' and '│' that I sometimes use in comments in m-files are being removed: % Comput...

11 mesi ago | 0 answers | 0

0

answers

Answered
How to add variable names for each column when using array2table
I wrote a function to do it: function T = array2table_with_name(X, label, sep) % T = array2table_with_name(X, label) converts ...

11 mesi ago | 0

Question


Best way to generate an array of all possible integer numbers for a given base and number of digits
I want to prepare an array that contains all combinations in rows of possible sequences represented by an d-digit number of base...

12 mesi ago | 1 answer | 0

1

answer

Answered
CRL:"Simulation Target IPP BLAS" cannot be found in the registry
Problem was solved for me on Mac OS X by closing MATLAB and all Simulink files and restarting.

12 mesi ago | 1

Answered
How to construct a cell array containing a power series of a matrix
Here is a solution using cellfun: results = cellfun(@(i) A^i, num2cell(1:n), 'UniformOutput', false)

12 mesi ago | 0

Question


How to construct a cell array containing a power series of a matrix
I want to compute the following power series of a square matrix A (as a preliminary step to constructing a larger matrix using t...

12 mesi ago | 1 answer | 0

1

answer

Answered
Bypassing the internal (Linear) observer in MPC toolbox 3
Might be 10 years too late but I had this question and it looks like you can set the following check box below in the Simulink M...

circa un anno ago | 0

Answered
How to deal with Extended Kalman Filter in Simulink when my state transition function is given in continuous time form?
Check out the examples in the documentation here: https://www.mathworks.com/help/control/ref/extendedkalmanfilter.html The exa...

circa un anno ago | 0

Answered
Simulink: There is no solver registered as 14.
I don't know exactly what caused this error but I found I could run the msfcn_limintm.m example from the S-functions in the docu...

circa un anno ago | 0

Answered
How are structs handled when passed to a function?
Seems that MATLAB makes a complete copy of a struct when it is passed to a function if any element is changed by the function (s...

circa un anno ago | 0

Question


Unable to detect datetime or duration data using readtimetable with a seconds index
Here is a toy example of my problem: % Create a timetable with a seconds index data = timetable(seconds(1:3)', randn(3,1), ran...

circa un anno ago | 1 answer | 1

1

answer

Answered
Find the First element that satisfies a condition
If you only want to find the locations in A where the condition is true and then index those values you can use find: >> elemen...

circa un anno ago | 0

Answered
What is the 'MeasurementFcn1Inputs' input on the Extended Kalman Filter Simulink block?
I found the problem. I was using the same function (robot_outputs) for the NLMPC and the EKF: function y = robot_outputs(x,u) ...

circa un anno ago | 0

| accepted

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