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Steven Lord


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MathWorks

5,398 total contributions since 2002

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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Answered
Split Table data based on Day Names
Do you want to have seven individual variables or do you want to operate on the set of rows in your table data where each row in...

1 hour ago | 0

Answered
How can I fix the problem of deep network designer in MATLAB?
Which release of Deep Learning Toolbox are you using? If you're using a release prior to R2019a I suspect though I'm not certain...

3 hours ago | 0

Answered
Passing structs/objects to functions
Just because MATLAB passes a large array into a function doesn't mean it needs to make a copy of that array if you don't modify ...

3 hours ago | 0

Answered
Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses.
for 1=1:n, The number 1 is not a valid variable name in MATLAB and so cannot be used as the loop variable in a for loop.

3 hours ago | 0

Answered
How to open Matlab with specific scripts in my editor?
Consider setting up different Projects for your different projects.

15 hours ago | 0

Answered
How to replace specific values to all values of a bin ?
Specify the values input argument in your discretize call. x = 6*rand(10, 1); d = discretize(x, 0:2:6, [1.6, 3.8, 5.7]); resu...

23 hours ago | 3

Answered
Nested structs and objects - do or don't?
Off the top of my head I'd probably use a three tier approach, something along the lines of the following untested code: classd...

1 day ago | 0

Answered
resampling to avoid limit - nchoosek
Assuming VID1 has 429 elements and Hcombos has 36 rows, that means you're trying to generate one of this many combinations: N =...

2 days ago | 0

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Answered
how to define a variable with dates
Adapt the example on this documentation page. It won't require a lot of modification.

2 days ago | 0

| accepted

Answered
Feature Matching in MATLAB
Break each of those steps into sub-steps. Repeat step 1 until you've broken each step into sub-steps that you are able to imple...

3 days ago | 0

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Answered
Hi, I want to write a code that locates the nth value of matrix x= [2,4,6,8,10,12,14,16,18,20] where n is [1:10]. How could I write that?
That's basic linear indexing. See the "Indexing with a Single Index" section on this documentation page for more information. x...

3 days ago | 0

Answered
Inconsistency of angle function in finding angle of vectors
Typing the command angle(1+i) yields an angle of 45 degrees, No it doesn't. It returns the equivalent angle in radians, however...

4 days ago | 0

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Comparative Operator result is wrong
Two numbers that are displayed the same may not represent the same stored value. See this Answers post for more information abou...

4 days ago | 0

Answered
How to clear a TestCase class from memory?
You may find this new feature introduced in release R2021a useful.

7 days ago | 1

Answered
How to get mean of all variables in a table?
The varfun function requires one of its inputs to be a table or timetable array (or a tall table or timetable.) which -all varf...

7 days ago | 1

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Answered
Graphplot nodes How to ensure generating only existing nodes.
S=[1 30]; T=[2, 1]; D1 = digraph(S, T) % use S and T as node numbers, 30 nodes plot(D1) D2 = digraph(string(S), string(T))...

7 days ago | 0

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Answered
Error using inlineeval (line 14)
Do not use inline. We first marked it "not recommended" somewhere between 15 and 20 years ago if I recall correctly. Just opera...

8 days ago | 1

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Answered
"Array indicies must be positive integers" error
The first element / row / column / etc. of an array in MATLAB is element / row / column / etc. 1. There is no element / row / c...

8 days ago | 0

Answered
Why I can't use keywords "AutoFitWidth" for writematrix() in MATLAB R2020a?
That functionality was added in release R2020b.

8 days ago | 0

Answered
How can I fix this error?
Where in your code do you define a variable named i? If the answer is some form of "nowhere" or "I don't" then MATLAB will call ...

9 days ago | 0

Answered
Modifying variables in properties(TestParameter) of the unittest class
You can define a class-related function at the end of the file, after the end that matches the classdef keyword, that returns th...

9 days ago | 0

Answered
Object oriented programming - Constructor behavior
Because class constructors are special. MATLAB knows exactly which method in a class is the class constructor (it has to have th...

9 days ago | 0

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Answered
Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses.
function plottransect(1) As stated on this documentation page "If your function accepts any inputs, enclose their names in pare...

9 days ago | 0

Answered
random number generator rng performs differently on compiled binaries (in Linux)
In your application, does the user call your function with the seed value that you pass into rng? x1 = myfun(42) x2 = myfun(99...

9 days ago | 0

Answered
Need assistance in fitting tool
"2pi" is not a valid way to write 2 in MATLAB. y = 2*pi

9 days ago | 0

Answered
Betweenness Centrality for a vertices in an adjacency matrix
Since this question was asked we have added the graph and digraph objects to MATLAB. Use one of those functions to create an obj...

10 days ago | 0

Answered
How to quote variables whose names are in order in a for loop?
See if some of the tools in MATLAB for working with data that is too large to fit in memory on one machine all at once will sati...

10 days ago | 0

Answered
How to add set/get methods methods in class constructor
If prop1, prop2, prop3, etc. are properties in this Registry object that you want to expose as properties of the ExampleClass cl...

10 days ago | 0

Answered
How do I print probability distribution object into textbox?
Since you're using release R2021a you can use the new formattedDisplayText function. x = randn(1e6, 1); pd = fitdist(x,'Normal...

10 days ago | 0

Answered
Extracting table from data structure
At first, I have loaded data using S = dir('*.mat'); The dir function does not load data. All it does is generate a list of fil...

10 days ago | 0

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