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Steven Lord


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MathWorks

4,686 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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Contributions in
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Answered
Changing a double type cell in "HH:MM:SS" format.
What duration do you expect 4.099215427200000e+09 to represent? If you give us one piece of a Rosetta stone we may be able to he...

4 hours ago | 0

Answered
how to install 2020a communication toolbox in matlab2019b? I tried installing but after 28% installed it is showing some issue.
Using toolboxes from one release in an installation of MATLAB from a different release is not supported. If you want to use the...

4 hours ago | 0

Answered
How can I get Matlab's Command Window to output the entire column vector of solutions?
You can increase the Command Window scroll buffer size to some extent (see this documentation page) but the scroll buffer is not...

17 hours ago | 0

Answered
why do I get different EigenVectors than my instructor got?
If v is an eigenvector of A corresponding to eigenvalue d, multiplying v by a non-zero scalar k results in another eigenvector o...

24 hours ago | 1

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Answered
MatLab crashes at each typo
Please send the crash log file created when MATLAB crashed to Technical Support for investigation. You can contact Support using...

1 day ago | 0

Answered
AppDesigner Standalone Desktop App does not light up
As this documentation page states, to create a "Standalone Desktop App" you must have MATLAB Compiler installed on your computer...

1 day ago | 0

Answered
Matlab parsing error after class declaration
"expr = drunk_walking;" is located inside the .m file. Move that line and the ones following it out of the classdef file. You c...

1 day ago | 0

Answered
Using rand function to generate a certain parameter of numbers
See the "Random Numbers Within Specified Interval" example on the documentation page for the rand function.

1 day ago | 0

Answered
How can I get the plot for a saved figure?
If you need to find the handles to all items that have a specific property (like MarkerSize or SizeData) calling findobj (or fin...

2 days ago | 1

Answered
Outer boundary of alphashape
Use boundaryFacets.

4 days ago | 0

Answered
"Array indices must be positive integers or logical values". Please help
By the way you called your function: [f]= NC(-3,0,fun) you're trying to assign to the -3rd element of f with the code: f(a)=...

4 days ago | 0

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Answered
Unrecognized function or variable 'findNearestNeighbors'. in R2020b
findNearestNeighbors is a method of pointCloud objects. You must pass a pointCloud object into it as the first input argument. B...

4 days ago | 0

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Answered
Generation of 6x5 matrix with even numbers from 20 to 100
For this specific problem you can generate integers in the range [10, 50] and multiply those integers by 2. For the more genera...

4 days ago | 0

Answered
Name-value pairs
if ~isdouble(varargin{i}) || isfloat(varargin{i}) Assuming there were an isdouble function doing what you would expect...

4 days ago | 0

Answered
please teach me how to change in 2020 version??
The modem package was removed from Communications Toolbox in release R2019a. We first noted that modem.qammod and modem.qamdemod...

4 days ago | 0

Answered
create a variable based on timetable's date period
Using the sample timetable Star Strider created: DT = (datetime([2017 01 01]):caldays(1):datetime([2020 01 01])).'; HP = ones(...

5 days ago | 0

Answered
I need to know whats hardware from nVidia it's certificat by MathWorks to MatLab (every function)
Are you asking which GPUs can be used for running functions in MathWorks products, and which functions can take advantage of GPU...

5 days ago | 0

Answered
Create a series of vector with different name
If you have time and/or date based data, consider storing it in a timetable array. Then you can access data from a certain range...

5 days ago | 0

Answered
When I use the patch function Matlab crashed
Please send the crash log file to Technical Support using the telephone icon in the upper-right corner of this page so the Suppo...

5 days ago | 0

Answered
Is This Concatenation Error a Bug?
(t and x come from a .mat file and are always equal dimensions and data types). Trust but verify. Set an error breakpoint and r...

6 days ago | 1

Answered
why does it get stuck in loop if?
In the part of your code that starts with the comment %inner nodes above intersection you have a while statement: while((Ny-d)<...

6 days ago | 0

Answered
Enquiry about the reason for the program not responding to the entered code
Are you copying the body of the function from this File Exchange submission into the Command Window? Note that the function requ...

6 days ago | 0

Answered
Check for missing argument or incorrect argument data type in call to function 'diff'. How to solve the issue? Please help.
The inline function is not recommended. If you were writing a function to be evaluated in MATLAB, you should create an anonymous...

6 days ago | 0

Answered
finding x0 in ziggurat algorithm
So you want to know how to find the equivalents of the numbers 0.83, 1.17, 1.47, 1.78, and 2.18 in the plot on this post on Clev...

6 days ago | 0

Answered
Converting numeric elements to date
Depending what operations you need to perform, you may be able to keep your data as a datetime array without converting it to se...

6 days ago | 0

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Answered
Calling a variable using a function - basic
function c = rand_val rand_val = rand end When you call this function it will throw an error. You'd defined rand_val to retur...

6 days ago | 0

Answered
How to print the data in the indicated manner with indicating numbers ?
You're almost there. When you call string on a non-scalar double array, each element of the double array becomes an element of t...

6 days ago | 0

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Answered
Writing Functions that take inputs?
If you aren't sure where to start because you're not familiar with how to write MATLAB code, I suggest you start with the free M...

7 days ago | 0

Answered
How can I use a for loop to create new variables?
There are many posts that say trying to create numbered variables like that is discouraged, yes. If you want to put all those p...

7 days ago | 1

| accepted

Answered
Indexing errors on sum
I'm guessing you've defined a variable named sum that's preventing you from calling the sum function. If my guess is correct cle...

7 days ago | 0

| accepted

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