photo

Steven Lord

MathWorks

Last seen: Today |  Active since 2002

Followers: 7   Following: 0

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.

Statistics

All
  • Treasure Hunt Participant
  • Scavenger Finisher
  • Most Accepted 2024
  • Thankful Level 5
  • Solver
  • Personal Best Downloads Level 2
  • Editor's Pick
  • Master
  • 36 Month Streak
  • 5-Star Galaxy Level 4
  • First Submission
  • Revival Level 3

View badges

Feeds

View by

Answered
Converting product into individual entries
If you have the individual terms and their replication factors already, see the repelem function. If you don't you may need to u...

10 hours ago | 0

Answered
How do I create a game update in a while loop
numPasses = 0; expectedDuration = seconds(1/30); while numPasses < 5 dt = datetime('now'); n = 0; while datetime('now')-dt ...

3 days ago | 0

Answered
save() seems to be saving objects that should be destroyed, causing errors when the resulting .mat file is loaded
txs = txsite("AntennaHeight",1.5, ... "Latitude", 38.9899587, "Longitude", -76.9353889, ... "Transmitt...

4 days ago | 0

Answered
Optional Arguments in Function as Struct Input
Use the namedargs2cell function.

6 days ago | 0

| accepted

Answered
How do I include a command line in my app when using MATLAB Compiler?
No, you cannot include the Command Window in your deployed application. Since you mention App Designer and "change directories",...

6 days ago | 0

| accepted

Answered
how can i open .lod extension and .iqd extension file in matlab?
That depends. What do those files represent? Looking at a file extension database a file with the extension .lod could be from: ...

6 days ago | 0

Answered
Loading user-defined classes from .mat files absent the classdef
At one time, if I had a .mat file with a user-defined class variable, but lacked the classdef file, loading the .mat file would ...

12 days ago | 0

| accepted

Answered
where can I find the code?
Go to the webpage or documentation page for the example that calls that function. Use the button to open that example inside MAT...

14 days ago | 0

Answered
Correct way to test if a value is a function?
If you are debugging (note: don't use this in "production" code, as called out in the Note on its documentation page) you could ...

1 month ago | 0

Answered
Code Matlab for a function that depends in a real parameter
Parameterize the function you pass into the integral function. See the "Parameterized Function" example on the integral document...

1 month ago | 0

Answered
Why the squeeze function squeeze 1x3 array to 1x3, but squeeze 1x1x1x3x1 to 3x1?
If I recall correctly (this was before my time at MathWorks started) squeeze was introduced when we introduced arrays with more ...

1 month ago | 0

| accepted

Answered
Is there a function to tell if Matlab is using little-endian or big-endian on current computer?
See the third output from the computer function. [str, maxsize, endianness] = computer

1 month ago | 0

| accepted

Answered
Vector where each value is X times larger than the last
Use cumprod. x = [2 3*ones(1, 4)] y = cumprod(x) If you don't know how many elements you want y to have, just what you want t...

1 month ago | 0

| accepted

Answered
Constraint set to be a real number
The outputs from the nonlinear constraint function should not be boolean values. They should be continuous values. Try making y...

1 month ago | 1

Answered
i need activation key,pleases help me
If you're trying to use your company or educational institution's license, ask whoever maintains the organization's software lic...

1 month ago | 0

Answered
Parfor random numbers are not quite random
I would expect all the elements of v to be unique because they are randomly generated. However, I observe that many of them coi...

1 month ago | 0

Answered
From perpetual and individual Matlab student license to academic and permanent Matlab license
I recommend you contact Customer Service directly using this link or the Sales department directly using this link for help with...

1 month ago | 0

Answered
How to efficiently pass input arguments to a compiled app?
See this documentation page.

1 month ago | 0

| accepted

Answered
What is the difference between these two commands?
s = [3 4] What you wrote won't work. It may seem deterministic in this scenario but in general it's ambiguous. try [m n] ...

1 month ago | 1

Answered
With contour of image how to change x and y axis?
As written you're using the contour(Z) syntax shown in the Syntax section on the contour function documentation page. The Descri...

1 month ago | 0

Answered
Appdesigner Question: Is it possible for a user to reset a default value?
One potential approach is to use custom settings. From that documentation page, "You can create custom settings to store and acc...

1 month ago | 0

Answered
Filtering test cases out of a test suite
I am writing a script that takes in a matlab.unittest.TestSuite object that contains several test cases from tests (call this te...

1 month ago | 0

Answered
Vectorized code slower than loops
Vectorization is one tool in your MATLAB toolbox, but so is the for loop. Each has its own pros and cons. I think Mike Croucher...

2 months ago | 3

Answered
What is the extended symbolic math toolbox?
It was a product that extended Symbolic Math Toolbox functionality. Many years ago (I don't remember the release offhand) the fu...

2 months ago | 1

| accepted

Answered
Hello, I'm trying to create a plot for an equation of motion defined as a function.
Please show (or even attach) the full and exact file. My suspicion is that the lines where you define those constants are ahead ...

2 months ago | 0

Answered
finding the value at a specific time from second-order ODE
You could call ode45 with just one output argument and then call deval, or you could call ode45 with the desired time as one ele...

2 months ago | 1

| accepted

Answered
Combine Two polyshape Objects Similar to addCell Functionality
p1 = nsidedpoly(4); p2 = nsidedpoly(5); The union function makes a polyshape with 1 region. P = union(p1, p2) Concatenation ...

2 months ago | 0

Answered
how would one use logic commands to run separate function files with single-statement intput?
Use the input function with the 's' option to allow the user to type in a string, or you could use uigetfile to let the user sel...

2 months ago | 1

| accepted

Answered
Spacing correction in documentation.
The spacing looks correct to me in the version of the documentation online to which you linked. Could you state which browser yo...

2 months ago | 0

Answered
Matlab Compiler: Is "userpath" always there and accessible?
I would probably try using the tempdir and/or tempname functions.

2 months ago | 0

Load more