Steven Lord

MathWorks

Last seen: Today | Actif depuis 2002

Followers: 2 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.

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Code not displaying figure
The behavior you described is correct. While your script does define three functions, nowhere in the lines of code in the script...

environ 4 heures il y a | 1

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Reading a text file using readtable, Matlab stubbornly refuses to accept dates in anything but US-format
The readtable function is very flexible, and that can sometimes make it a little more difficult to use than the lower-level file...

environ 8 heures il y a | 0

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Need help with homework.
When you call the input function with 's' as the last input, that function will return what you enter as text not as numbers. So...

environ 11 heures il y a | 0

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How can I clear an error "The expression to the left of the equals sign is not a valid target for an assignment?"
You cannot use assignment inside the body of an anonymous function. Change this: % Define the system of equations equations = ...

1 jour il y a | 0

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I am getting an error
This line of code: function output = convolution1dLayer(input, "stride",filtersize, "Padding",1 ) is not a valid definition of...

1 jour il y a | 0

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py.list bug in R2024a
See Bug Report 3293694.

3 jours il y a | 0

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How can I com[act my script by making it run up to an nth variable
Can you dynamically create variables with numbered names like z1, z2, z3, etc.? Yes. Should you do this? The general consensus ...

4 jours il y a | 2

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Eliminate the long number appearing in symbolic calculations
Note that you don't want to write your numbers in double first before performing calculations involving the symbolic variable J1...

7 jours il y a | 1

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Where I can find the MATLAB library *.m files?
What specifically do you mean by "MATLAB library *.m files"? If you mean the *.m files for built-in functions like matrix multi...

8 jours il y a | 0

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How store evolution of x over the iterations of lsqnonlin?
The ouput of the system is defined by a function file 'error.m', Please rename this function! error already has a very importan...

8 jours il y a | 0

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Method of Characteristics for Nozzle: Error with syms function
Looking at a few sections in your code, first you define x to be a symbolic variable and you use it as such. syms x f = @(x) (...

8 jours il y a | 0

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How do I pass a dynamic number of output variables to a function?
I need to pass a number of output variables that depends on other variable (whose value is not previously known). I wouldn't us...

8 jours il y a | 0

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I don't understand an error message I get that's related to function ode45.
More likely than not, your ODE function is returning a vector of a different size for one set of inputs than it does for other i...

9 jours il y a | 0

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Error using feval Function to evaluate must be represented as a string scalar, character vector, or function_handle object.
Run this command in your MATLAB Command Window. At the prompt, type the five characters bench and press Enter. fname = input('\...

9 jours il y a | 0

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the mechanism of different syntax for realizing the same effect
I'm not sure your mental model is quite correct, so I want to walk through your question in a bit of detail. Multiple syntaxes ...

9 jours il y a | 2

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test Statistic Toolbox without Flexlm server
You could check using the license function before you try to use functions from Statistics and Machine Learning Toolbox whether ...

9 jours il y a | 0

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problem with storing in an array
To take a smaller example: A = magic(4) What does indexing into A using one index do? A(3) If you count down the columns, 9 ...

11 jours il y a | 0

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Unable to called a function
If you're using release R2021b or later, consider using the ode78 function that is part of MATLAB as of that release. If that i...

11 jours il y a | 0

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opening .m file results in "index exceeds the number of array elements"
How are you trying to open the file? Are you calling open or edit with the name of the file as inputs? If so, make sure you don'...

11 jours il y a | 0

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App running slowly after some time
As J stated, without seeing the code it's going to be difficult or perhaps impossible to offer any concrete suggestion. But from...

11 jours il y a | 0

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For Loop Increment Array
I wrote the code according to my lesson but it keeps inserting a 0 between each number in the array. It doesn't so much insert ...

11 jours il y a | 0

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What About My Matrix Makes eig Inaccurate?
N = 30; f_matrix = zeros(N, N); even_sum_matrix = zeros(N, N); odd_sum_matrix = zeros(N, N); for t = 1:N for s = 1...

13 jours il y a | 1

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Need help to solve with ncmlogo.m
Let's look at the text of the error message. Incorrect use of matlab.graphics.chart.primitive.Contour/setZDataImpl Z must be a...

14 jours il y a | 1

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Unhelpful error message: Conversion to matlab.ui.control.Table from table is not possible.
Please send this enhancement request to Technical Support directly using this link.

15 jours il y a | 0

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Argument validation for class methods
The class specification of the obj argument seems superflous and should be self-evidently true. Not necessarily. The first inpu...

15 jours il y a | 0

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How can I apply data in function?
I'm not sure I understand your question. Are you asking about how to pass input arguments into a function? If so see this docum...

15 jours il y a | 0

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Solving unknown matrics to the power 20
p = [1 0 0 0 0 0 0]; R = [9; 8; 7; 6; 5; 4; 3]; CR = [0.45]; RHS1 = CR./(p*R) Did you perhaps mean to take the outer product...

16 jours il y a | 0

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How to use the class of Interleaved ADC.m?
Do either of these two examples (example 1, example 2) provide the information you seek about the functioning of the Interleaved...

16 jours il y a | 0

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I am trying to figure out how to use writetable instead of xlswrite, but the feature is converting my numbers to text. Headers are text.
Don't concatenate Excel_head and Excel_out together. Store them as separate table variables. load patients; LNS = string(LastN...

17 jours il y a | 0

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How to measure time of matrix multiplication in matab?
As stated on this documentation page, "Sometimes programs run too fast for tic and toc to provide useful data. If your code is f...

17 jours il y a | 0

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