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Steven Lord

MathWorks

Last seen: Today Active since 2002

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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
Cell array with adjacents elements by a “from” vector and a “to” vector
What are you hoping to do with this list? Depending on the specific operations you're looking to perform you may want to create ...

3 days ago | 1

Answered
Keep underscore symbol using latex as interpreter
This text call uses _ to make x a subscript of a. text(0.25, 0.25, "Text with $a_x$ and LaTeX interpreter", Interpreter = "late...

4 days ago | 0

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Answered
How to use speechClient("wav2vec2.0") command
From the speechClient documentation page: "Using wav2vec 2.0 requires Deep Learning Toolbox and installing the pretrained model....

4 days ago | 0

Answered
Name of Component in Simulink (out.e, out.r)
Since it has no outgoing ports, I suspect it's one of the Sinks blocks. Looking at the list and the picture on each sink block's...

4 days ago | 0

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Answered
How to use IgnoringFields in StructComparator?
Rather than building a StructComparator, just specify "IgnoringFields" in your IsEqualTo call. s1 = struct('a', 1, 'b', 2); s2...

4 days ago | 1

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Answered
Make histogram for array of datetimes
Let's make some sample dates and times. n = 10; T = datetime('today'); d = T + ... hours(randi([-24, 24], n, 1)) + ... ...

4 days ago | 0

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Answered
str2num is returning and empty matrix: []
Since month is a string containing the text representation of a number, you don't need to use str2num. Just call double on it. ...

5 days ago | 0

Answered
Different output using mldivide with newer matlab version
We do not guarantee that the results from mldivide will be exactly the same, down to the last bit, across: different operating ...

5 days ago | 0

Answered
pulling non-consistent arrays out of a structure
If you're using release R2023b or later, the resize function may be of use. Let's make some sample data. data = {(1:3).', (4:8)...

6 days ago | 0

Answered
Code runs well on Windows but gets errors on Apple Silicon Mac
which cec22_test_func There is no such function in MATLAB. This is confirmed by a search of the MathWorks website, which only f...

7 days ago | 0

Answered
Why readtable is not reading all my rows, it has a limit?
I believe the presence of data in P56 makes MATLAB consider rows 1 through 55 as headers. Note that detectImportOptions consider...

7 days ago | 2

Answered
Matlab tool to plot 3d phase portrait
Use odeset to set the OutputFcn option to @odephas3. See the ballode or orbitode example files for a demonstration of how to use...

9 days ago | 0

Answered
My function doesn't append to it's list
Your recursive calls only call your function with one output argument, so the modified second output argument is not returned fr...

10 days ago | 0

Answered
How can I solve this implicit function in MatLab?
Let's take a simpler example and call fimplicit with an output argument, the handle of the graphics object that fimplicit plots....

10 days ago | 1

Answered
Dot indexing is not supported for variables of this type
If you are attempting to compile code using MATLAB Compiler that calls load to load an object from a MAT-file and there is no in...

10 days ago | 0

Answered
Locate and syncronize timestamp
Rather than splitting the strings representing dates and times into vectors of numbers and trying to perform date and time arith...

11 days ago | 0

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Answered
I am trying to reinvent wheels of fft. But the recursive function of mine seems to be not working due to N
Why did N becomes array? Because in your recursive call: return_arr(k+1, 1) = my_fft(arr_even, N/2, k) + (cos(temp) + 1i*s...

11 days ago | 0

Answered
no definition for plot3
Based on the translation of the Code Analyzer message DGM posted, it seems that somewhere in the PlotDampRoots function you assi...

12 days ago | 0

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Answered
Pass variable name through variable of a custome save function made error
When you call this code, what does this command show? whos knee_toruqe_trainedModel If it shows nothing, try with the correct ...

12 days ago | 0

Answered
Opensource matlab standalone application license requirements
Please contact the Sales department directly using this link with this licensing question.

12 days ago | 0

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Answered
solving non-linear ODE
This line suggests you're performing operations with symbolic variables. term1 = simplify(a - c); If so, you're probably going...

12 days ago | 0

Answered
How to draw an histogram?
So you know the bin edges and the bin counts? Call histogram with 'BinEdges' and 'BinCounts' along with the vectors of bin edges...

13 days ago | 0

Answered
Live Editor long display output bug. Command to remove output from Live Script?
Please send the Live Script with which you were able to reproduce this error to Technical Support directly using this link so th...

13 days ago | 0

Answered
how to not violate from trnasparency in parloop? (a good replacement for "which" or "exist")
How does that variable get created in the workspace? Inside the loop or before? If it gets created inside the loop I'm not sure ...

13 days ago | 0

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Answered
How to install Matlab without Oracle java and use Open JDK instead?
Please see this Answers post.

13 days ago | 0

Answered
Erorr when replace row's value of table in-array.
% jointTSS1{i,1}.ID(1) = jointTOSnew1{i,1}.ID(ismember(jointTOSnew1{i,1}.X,startTSS1{i,1})); You're assuming that the ismember ...

13 days ago | 0

Answered
Running a function with a parameter from the command line
In general, when you are experiencing difficulties please explain what type of difficulties you're experiencing. Do you receive...

14 days ago | 1

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Answered
Vector with symbolic variable
If you have a symbolic variable that contains a function of another symbolic variable and you want to substitute values for that...

16 days ago | 1

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Answered
Parallel execution using parfeval does not modify input handle object as expected
See this documentation page for an explanation and a description of how I think you can achieve the behavior you're looking for....

17 days ago | 0

Answered
I can't get the result of exact dividing
Use vpa to approximate the fraction as a decimal number. syms m n x y a b D p0 Pmn= 16*p0/(pi^2*m*n); b=2*a; w(x,y)= 1/(D*p...

17 days ago | 0

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