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Steven Lord

MathWorks

Last seen: Today |  2002 年からアクティブ

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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Solve symbolic equation for a variable which itself is a function of time
If you're trying to solve a differential equation, try using dsolve instead of solve.

約2時間 前 | 0

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What's wrong in this function
You define your function as follows (with a break added so we can see all the input arguments on one line.) function ELS_Price=...

約2時間 前 | 0

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How do I convert my .m file into a .exe file?
Another alternative, one that didn't exist when this question was originally asked ten years ago, is to have your users use MATL...

約2時間 前 | 0

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Matlab creates same input values every time? Why?
Others have told you how to get the numbers to not repeat after startup. But to answer your "Why?" question, this is expected be...

約4時間 前 | 1

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Using an anonymous function handle as input into another function handle
And then I want to use omega as input to the next function. What specifically do you mean "as input to the next function"? How...

約5時間 前 | 0

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Invalid Activation Key (510). so what is the activation number?
See this Answers post for more information about that error and how to resolve it.

約5時間 前 | 0

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Data analysis - How to recognize local peaks/different areas?
You can use the ischange function to identify where the mean of the data changes. Using the same approach for generating sample ...

約10時間 前 | 0

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quadruple summation using function
You could use implicit expansion to avoid having to create quite so many large arrays. It's not as fast as the case that exploit...

2日 前 | 1

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What is Mathworks Service Host?
See this Answers post.

5日 前 | 0

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dsolve function is not working
You've written your own dsolve.m file that's taking precedence over the dsolve function that is part of Symbolic Math Toolbox. I...

5日 前 | 0

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Requesting theoretical support for interdigital capacitor function
Do the reference books/papers in the References section of the documentation page for the interdigitalCapacitor function not inc...

5日 前 | 0

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Random sequency generation at specific numbers
Replicate the vector so it has more elements than you want. Then use the two input form of randperm to select the desired number...

6日 前 | 0

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xtick label font change affect ytick label font
Changing the FontSize property of an axes does affect the font size of both the X and Y rulers. If you get the ruler you want to...

7日 前 | 0

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I want to gererate pseudorandom integers using randi function, however I want have empty cells between the integers.
Numeric arrays in MATLAB can't have "holes". Perhaps if you describe in more detail how you're hoping to use this type of array...

7日 前 | 0

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Mackey Glass equation and ddesd
So in these equations you're using the Equation 2 form where is 2, is 1, n is 9.65, is 2, and is 1? If the density of the c...

7日 前 | 0

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Matlab License File Precedence
That is what the MATLAB License Search Path section on this documentation page states.

7日 前 | 0

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How to doc() a command which is overloaded by multiple toolboxes
The evaluate function in both those products (and a few others) is a method of different types of objects. which -all evaluate ...

7日 前 | 0

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I can not open spm12 with MATLAB
SPM12 is not a MathWorks product and so I don't have any experience with it, but based just on the error message and the URL of ...

8日 前 | 1

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Run Section funcionality isn't working
In order to run MATLAB code in a code file, the name of that file must satisfy the requirements given by the isvarname function....

8日 前 | 1

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S-Function support for future releases
The Release Notes for Simulink Coder in release R2022b includes an entry that seems to be relevant to this question. The suggest...

8日 前 | 0

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remove numbers of an matrix from another matrix
Call setdiff with the 'rows' input.

8日 前 | 0

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How can one debug mex code called by fminsearch?
What happened after you handled the SIGSEGV and SIGBUS signals as described in the last section, "Debug MEX with JVM", on this d...

8日 前 | 0

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my optimization toolbox does not open
If you're referring to optimtool, it was removed in release R2021a. For a graphical interface to the Optimization Toolbox functi...

9日 前 | 1

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how change order color legend?
If you're using release R2023b or later, there's a new legend property introduced in R2023b that may be of interest to you. Chan...

10日 前 | 0

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Moving skewness/kurtosis/rms/autocorrelation for time series. Fast Implementation.
Currently MATLAB does not have any functions for computing the moving skewness, kurtosis, rms, or autocorrelation. For a list of...

11日 前 | 0

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How to take a value between two values
If you hover over the underlined <= operators in the code in the MATLAB Editor, you will see a Code Analyzer message explaining ...

12日 前 | 0

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When is the official release for MATLAB for Silicon Macs?
It is currently: datetime('now', TimeZone="local", Format = "dd-MMM-yyyy hh:mm:ss a z") and the Release Notes indicate that re...

13日 前 | 0

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lambr0 and zeta0 outputting 1x1 answer when I want them to output 1x7 answer, any suggestions?
In addition to using element-wise power (the .^ operator) and element-wise multiplication (the .* operator) you need to use the ...

14日 前 | 0

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Matlab Service request and bug inaccessible
I don't see any outages listed on the Application Status page. When I tried connecting via Microsoft Edge I was able to access t...

14日 前 | 0

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standard deviation takes for ever
Can you confirm you're using the std function included in MATLAB? What does this command show? which -all std

14日 前 | 0

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