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Steven Lord

MathWorks

Last seen: Today 2002년부터 활동

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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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how to get variable of function in for loop
Don't call max twice. Call max once with two output arguments and specify 'all' as the dimension over which to operate. That sec...

대략 24시간 전 | 1

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Assign column names in a workspace table
Use the renamevars function.

3일 전 | 0

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Converting between x,y cartesian variables to angle in symbolic variables
So instead of the Cartesian coordinate form of those points, you want a polar coordinate form? syms x y [th, r] = cart2pol(x, ...

3일 전 | 0

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Is numel() supposed to accept more than one input argument?
If I recall correctly this syntax used to be documented as a way for objects to be able to specify the size of the output that s...

6일 전 | 1

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The solution to the delayed differential equations using the code dde23 represents the solution by the third order Runge-Kutta method or what?
It's not clear to me what information you're looking for. The dde23 function returns the solution to a system of delay different...

6일 전 | 0

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Making use of figure numbers is discouraged – what are your workarounds?
Rather than trying to set the number, why not create an array of figure handles and use the number as an index into that array? ...

6일 전 | 3

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Loss is still larger than 30?
Let's take a look at a few lines of your code. I've commented them out since I want to also run some code and these code snippet...

6일 전 | 0

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Fzero function error in MATLAB. Need inputs regarding the ways to combat the error
If Q_rest_Na_Cl is a variable, is b a logical array or does it contain only integer values? If not, you cannot use b to index in...

6일 전 | 0

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function file used with 2 Matrices as input
In your function, you declare it to accept up to two input arguments. Because you use both of those input arguments in the line ...

7일 전 | 0

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Time difference in year between table datetime values and now
Don't use the now function. It returns a serial date number. Use datetime('now') (which returns a datetime) instead. fiveYearsF...

8일 전 | 0

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Speed to graph basin of attraction of Newton's method is very slow
A few comments on sections of your code. close all; clc; tic % Adding for purposes of running in MATLAB Answers %Systems of...

8일 전 | 2

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Is it possible to assign variables in the workspace to other variables using for loop?
Can you dynamically create or work with variables with numbered names like a_1_1, a_1_2, a_1_3, a_2_1, a_2_2, etc.? Yes. Should...

9일 전 | 3

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search interval in datetime
Use the timeofday function to return the time since midnight of each element of the datetime array. T = datetime('today') + ho...

9일 전 | 0

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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 ...

13일 전 | 1

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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...

14일 전 | 0

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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....

14일 전 | 0

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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...

14일 전 | 0

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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...

14일 전 | 1

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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)) + ... ...

14일 전 | 0

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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. ...

15일 전 | 0

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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 ...

15일 전 | 0

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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)...

16일 전 | 0

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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...

17일 전 | 0

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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...

17일 전 | 2

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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...

19일 전 | 0

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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...

20일 전 | 0

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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....

20일 전 | 1

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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...

20일 전 | 0

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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...

21일 전 | 0

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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...

21일 전 | 0

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