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Steven Lord

MathWorks

Last seen: Today |  Active since 2002

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I joined The MathWorks in the Technical Support department during the summer of 2001 and transferred into the Quality Engineering department in March of 2004. I now work qualifying the core MATLAB numerical functions (PLUS, MINUS, LU, FFT, ODE45, etc.) Professional Interests: mathematics, MATLAB For assistance with MATLAB question please post to MATLAB Answers or contact Technical Support using the Contact Us link in the upper-right corner of the page instead of contacting me directly.

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I want a Mathworks Polo Shirt
We have now opened the MathWorks Merch Shop. See this blog post for more information.

20 hours ago | 1

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MATLab promotional items?
We have now opened the MathWorks Merch Shop. See this blog post for more information.

20 hours ago | 0

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May I have some Matlab stickers?
We have now opened the MathWorks Merch Shop. See this blog post for more information.

20 hours ago | 0

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Wondering if you have any merchandise for sale cause I'd love to look like a part of the MATLAB team 😀
We have now opened the MathWorks Merch Shop. See this blog post for more information.

20 hours ago | 2

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How do I get MathWorks Promotional Items or Accessories?
We have now opened the MathWorks Merch Shop. See this blog post for more information.

20 hours ago | 0

Answered
how to calculate mape
The mape function was added to MATLAB in release R2022b.

1 day ago | 0

Answered
"platform" error after copying Matlab example to a PC
Comparing the version of the example from release R2023a and the version from the most recent release (as I type this, release R...

2 days ago | 0

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when open MATLAB there is such error on command window Error using settings. Too many output arguments. how to solve it
If you've written your own settings.m file, it's likely conflicting with the settings function that's part of MATLAB. Rename you...

2 days ago | 0

Answered
Error "gausswin requires Signal Processing Tool"
The gausswin function is part of Signal Processing Toolbox. Do you have this toolbox installed and licensed? To check if you hav...

3 days ago | 0

Answered
What is wrong with my approach to building this histogram?
From the documentation for the polarhistogram function: "polarhistogram(theta) creates a histogram plot in polar coordinates by ...

3 days ago | 0

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If else statement now hanging up and error message Subscripting into a table using one subscript
If I remember correctly, indexing into a table array using parentheses and one subscript has never been supported. So if that wo...

3 days ago | 0

Answered
Why don't I need a comment character after an (...) ellipsis?
Because that's what the ellipsis is documented to do. From that documentation page: "The ellipsis symbol (...) continues the cur...

6 days ago | 1

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Answered
Linear indices from colon operator
See sub2ind.

7 days ago | 1

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Multiple outputs from anonymous function
When you define an anonymous function, assign it to one output. f = @(x) svd(x, "econ") % Define f When you call an anonymous ...

8 days ago | 0

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null or NaN entries in image arrays?
If your images are stored in an integer data type, assigning a NaN value into that array will store a 0 in that location. There ...

8 days ago | 0

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Class property described, but not available for serialPort objects?
The Version History section on that documentation page states that there is a "New Tag Property" introduced in release R2024a. S...

9 days ago | 1

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Answered
Is there a way to define a callback function in Matlab that triggers on runtime errors?
Depending on what exactly you want to clean up, creating an onCleanup object may be of use to you. When this object is destroyed...

11 days ago | 0

Answered
Unit testing of a script that requires a file as input
I would split your script into two pieces: An interface piece that calls input. This piece would not be used during automated t...

13 days ago | 0

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Constructing a string with several index requirements
r2 = [0 30 60 90 120 150 180 210]; ind = 0:numel(r2)-1; result = join("ScanArray(0)(" + ind + ")=" + r2, newl...

13 days ago | 1

Answered
Changing values in an array with unknown dimension
You can use ind2sub as suggested in the answer posted by @Jaynik. But as they wrote that code, they hard-coded the number of dim...

14 days ago | 1

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Mesh error on my Matlab R2024a home edition
You have your own script named strings.m. MathWorks introduced a strings function in release R2016b and this function appears to...

20 days ago | 0

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Answered
Sparse matrix memory understanding
Please don't post pictures of code. MATLAB Answers can't run pictures of code. rng default Yb = unifrnd(-1, 1, [20000 20000]);...

22 days ago | 0

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Answered
if/elseif statement with rand() falling between two values
You could either write your code like this: rng default % Allow both code segments to generate the same sequence of random numb...

22 days ago | 0

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Answered
Rock, Paper, Scissors Game
You could, instead of making a matrix of results, make a table. possibilities = ["rock", "scissors", "paper"]; results = array...

23 days ago | 1

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How to remove some xticklabels (but still keeping all the xticks)?
x = 1:100; y = exp(-0.1*x); plot(x,y) xticks(0:10:100) xl = xticklabels; xl(1:2:end) = {''}; % Replace every other label x...

23 days ago | 1

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ltefadingchannel built-in function
which -all ltefadingchannel So this is a MATLAB code file. dbtype 189 lteFadingChannel.m It's a MATLAB function file. You can...

23 days ago | 0

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Solve and Vpasolve can't find solutions
I am trying to solve this system of equations for my class. No, you have a system of inequalities and equations. Let's try solv...

24 days ago | 1

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Answered
Suppressing braces and single quotes of a string matrix
That's not a string matrix. That's a cell array each cell of which contains a char vector. Commonly that's referred to as a cell...

27 days ago | 0

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Array indices must be positive integers or logical values
If you are attempting to compile code using MATLAB Compiler that calls load to load an object from a MAT-file and there is no in...

28 days ago | 0

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Problem with iradon in Matlab 2024b
Can you confirm that you're using the iradon function included in Image Processing Toolbox? The error message indicates the fail...

29 days ago | 0

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