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Steven Lord

MathWorks

Last seen: Today Active 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
Detect Mean Shift and Remove Outliers
Try the rmoutliers function or the Clean Outlier Data task for the first part of your question. Try the ischange function or the...

ungefär 6 timmar ago | 0

Answered
pwd doesn't give actual location of the file that called it
Giving the location of the currently running file is not the purpose of the pwd function. Its purpose is to give the location of...

ungefär 8 timmar ago | 0

Answered
Knob for Matlab App Designer to move like the knob for a microwave
Do you mean you want the value of the knob to decrease over time? You should be able to do that by changing its Value property, ...

ungefär 10 timmar ago | 0

Answered
I get wrong value
I take it that the A and B variables are your attempts to convert the first two equations into the coefficient matrix and right-...

ungefär 11 timmar ago | 0

Answered
Why does Matlab standalone application waits at the starting?
Starting the standalone application is like starting MATLAB. So when you compare the time to start the application to the time t...

ungefär 12 timmar ago | 0

Answered
Shortkey to open previous Editor tab?
Opening the Preferences, selecting the Keyboard > Shortcuts entry under MATLAB, and searching for "tab" found the Previous Tab a...

ungefär 23 timmar ago | 0

| accepted

Answered
switching from 2013b VERSION TO 2020. Accessing figure handle from plot command
Prior to the major graphics changes in release R2014b legend created an axes. As of release R2014b it now creates a legend objec...

en dag ago | 0

Answered
Simple xline with all options
From the documentation, note that labels comes after the LineSpec but before any name-value pair arguments as stated in the four...

en dag ago | 0

Answered
Can i get a trial extension, i will have money soon, am out now., early November.
Please contact Customer Service with this request.

en dag ago | 0

| accepted

Answered
making repetitive code less clunky
I would try using discretize to bin the data into groups then use groupsummary to compute the max on each group.

en dag ago | 1

Answered
Write a function taking three variables as input and returning the minimum of them. i've tried doing this-
See this section of the documentation for instructions on how to create a function with input and output arguments in a file.

en dag ago | 0

Answered
Out of memory. The likely cause is an infinite recursion within the program. Error in resample1 (line 6) y = resample1(x, type, shift, extmod);
I'm not familiar with this third-party Contourlet Toolbox (you may need to talk to the author of that toolbox for help) but this...

2 dagar ago | 0

Answered
Incorrect use of '=' operator. Assign a value to a variable using '=' and compare values for equality using '=='.
-dcdt(2)=(1/theta(7).*dcdt(1))+(1/theta(8).*dcdt(3))+(theta(9).*c(1)); Assigning to element 2 of the variable dcdt is allowed. ...

3 dagar ago | 0

Answered
Is there an alternative to eval in a struct?
For most of what you're trying to do you could use setfield. subject = {'subj_1','subj_2','subj_3'}; runs = {'rest','task1','t...

4 dagar ago | 0

Answered
why do I get this error? Indexing
I'm guessing you have: A = duration([1; 2; 3; 4], [5; 6; 7; 8], [9; 10; 11; 12]) C = {'03:07:11'; '01:06:12'} You can't use C...

4 dagar ago | 0

Answered
Deleting from an array
See this documentation page for examples of deleting rows or columns from a matrix.

4 dagar ago | 0

Answered
Sort in descending order without using built-in sort function
Your code does not satisfy the requirements of the assignment. The problem statement says: Create a function file that accepts ...

5 dagar ago | 0

Answered
Solving a tridiagonal matrix in matlab using Thomas algorithm
Is there a particular reason you need to solve this using that specific algorithm? Try using the normal backslash operator (\).

5 dagar ago | 0

Answered
from a circle to polygon
As @Scott MacKenzie stated, you can approximate a circle as a many-sided regular polygon. The nsidedpoly function will create su...

5 dagar ago | 0

Answered
Change sympref with shortcut line of code
You could create a simple function to change the preference. You could even have that function retrieve the current value and se...

5 dagar ago | 0

| accepted

Answered
does anyone know how to solve this?
Since this is for an exam we can't give you the solution. Each of those three equations are differential equations so the tools ...

6 dagar ago | 0

Answered
Matlab2020a version of optimization tools does not have a genetic algorithm toolbox
In order to use solvers from Global Optimization Toolbox in optimtool you need Global Optimization Toolbox installed and license...

6 dagar ago | 1

Answered
What is the alternative of HARQEntity() function in MATLAB 5G-Toolbox R2021b in 5G-Toolbox R2021a
Re: upgrading, are your current on your software maintenance?

6 dagar ago | 0

| accepted

Answered
How do I install Matlab on Linux Mint
You've completed step 1 of the three steps on the Installation and Licensing documentation page. Continue with steps 2 and 3. A...

7 dagar ago | 0

Answered
How can I compute the following triple integral for a function handle that is expressed by x(1), x(2), x(3)?
integral3 requires the function handle you pass in as the first input to accept three input arrays and return an output array of...

7 dagar ago | 0

| accepted

Answered
How could I graphic a matrix AxBxC
How do you want the picture of your 3-dimensional array to look? If there's a picture from a book or article that you're trying ...

7 dagar ago | 0

Answered
Please help me to look at the code below. Thx
Change the name of the output variable on line 15. When a variable named min exists you will not be able to call the min functio...

7 dagar ago | 0

| accepted

Answered
please help me, this is my preliminary exam but may prof did not teach this to me. thank you
Since this is an exam question I won't provide you with the answer, but I will point you to the section of the documentation tha...

7 dagar ago | 0

Answered
Make an Histogram with 24 bars
The histogram function can operate on datetime and duration arrays. Here's an example using datetime; you should be able to adap...

7 dagar ago | 0

Answered
Problems with function num2str
If you want to convert a numeric array to an array of text where each element of the numeric array becomes its own element in th...

7 dagar ago | 0

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