Steven Lord

Last seen: Today

MathWorks

4 884 total contributions 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
Sorting time in 1 hour time slots.
minutesPerDay = minutes(days(1)); m = minutes(randi(minutesPerDay, 100, 1)); n = datetime('now'); t = n + m; h = histogram(t...

ungefär 9 timmar ago | 0

Answered
Generalized Eigenvalue Problem - Hessenberg Matrix
It sounds like you might want to use the syntax of eigs whose first input is Afun, a function handle that returns the result of ...

ungefär 24 timmar ago | 0

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Error using inputdlg: dialogs disabled
Line 2 of the inputdlg function included in MATLAB is a comment describing the function. Therefore you have written or downloade...

en dag ago | 0

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Creating a symbolic array
If you want an array of q's: syms q A = repmat(q, [5 5])

en dag ago | 0

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Installing matlab 2019 on windows
Searching using Google for "exec error 22" found this MATLAB Answers post that appears to be relevant.

en dag ago | 0

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I can't create a graph from the adjacency matrix
I suspect you've created a digraph object and stored it in a variable named graph, which will prevent you from calling the graph...

en dag ago | 0

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How to find minimum value ,correspondings to a column ,in an output ?
The second output from the min function will help you retrieve the corresponding element of x.

en dag ago | 0

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tan verses tand error in loop
phi_o(i) = (atand((0.5*g*t(i).^2*((1/3)*(2*sqrt(Vx(i)/Vx_o)+1)))/x(i))); ...

2 dagar ago | 0

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Answered
How to get a function from user without knowing its symbols
The symvar and str2sym functions listed (along with many others) on this documentation page may be of interest to you.

2 dagar ago | 0

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how do I right x^2 in MATLAB
To raise a square matrix to a power use the ^ operator. To raise each element of an array (the array need not be square or even...

2 dagar ago | 0

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Why is line visible while its parent axes is unvisible?
Because the line has its own Visible property and that property's value is 'on'. fig = figure; ax = axes(fig, 'Visible', 'on')...

3 dagar ago | 0

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How can I create bins in Matlab using predefined counts?
histogram('BinEdges', [2, 4, 6, 8], 'BinCounts', [20, 5, 13]);

3 dagar ago | 0

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Function keeps getting errors, how to fix?
What is the full and exact text (everything displayed in red and/or orange in the Command Window) of the error and/or warning me...

3 dagar ago | 1

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How can I get the solve function to display values instead of solutions containing other variables?
syms d D N_a D_od = 1.9; %outer diameter of coil C = 7; eqn1 = (D_od-d)/d == C; solve(eqn1,d) This second line of code solv...

3 dagar ago | 0

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Answered
I am not able to use the function minibatchqueue. I get the error as "Unrecognized function or variable 'minibatchqueue'."
According to the documentation page this function was introduced in Deep Learning Toolbox in release R2020a. Do you have this to...

3 dagar ago | 0

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2016b installtion problem
What happened when you tried pressing Yes? If that still did not work, you may want to try restarting the installer in case tha...

3 dagar ago | 0

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How and when can future versions of the custom deep learning layer improve flexibility?
If you wish to request that the custom deep learning layer functionality be enhanced with specific functionality (like the abili...

4 dagar ago | 0

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Arg max of a function
The operator + does not and cannot return two output arguments. Nor can its functional form, plus. As a hint, take a look at th...

4 dagar ago | 1

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Creating a Matrix of random numbers
possibleValues = [-1, 1]; desiredSize = [5 6]; A = possibleValues(randi(numel(possibleValues), desiredSize)) This assumes you...

4 dagar ago | 2

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Answered
My polyfit function is displaying NaN
There are at least three potential difficulties with your code. The first difficulty is that you're passing log10 of the Displac...

5 dagar ago | 0

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Draw a heptagone of dice vertices. MATLAB.
polyshape, patch, or plot are three possibilities depending on what you want to do later on with the polygon.

5 dagar ago | 0

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How do I throw an error from TimerFcn?
The TimerFcn is running at the same time as MATLAB is executing the try / catch block but it's not executing "inside" the try / ...

5 dagar ago | 0

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I'm keep having an error 'Not enough input arguments' for this code
Others have commented on the fact that you need to call your function with an input argument. I want to point out a different pr...

5 dagar ago | 0

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discrepancy in date conversion
See the description of the dateType input that you can pass into datetime on the documentation page for datetime, specifically t...

6 dagar ago | 0

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create multiple separate vectors from a For loop
Rather than creating several different variables with numbered names or even a cell array, I'd prefer to create an array. nside...

6 dagar ago | 0

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How to change exponentiation
Change the display format. format % default which is "format short" e = [5.45894e-6, -1.875e-5, 6.25e-6; ... -1.875e-5, 1...

6 dagar ago | 0

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I can't get millisecond accuracy from string based timestamp - not sure what I'm doing wrong
If you don't have date information associated with your timestamps, I would use duration instead of datetime. S = ["11:00:00.14...

6 dagar ago | 0

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why do I have unrecognized function error for z?
What should the value of z be if buff is none of "none", "30min", or "60min"? What if buff was "30 minutes", for example?

6 dagar ago | 0

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Cannot call INPUT from EVALC
You cannot call input from within evalc. I believe this is the expected behavior. evalc would prevent the prompt text from input...

6 dagar ago | 0

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How to disable the TAB to get into an EditField box (R2020b)?
Try setting its Enable property to 'on' and its Editable property to 'off'. See the pictures in the description of the Editable ...

6 dagar ago | 0