Steven Lord

Last seen: Today

MathWorks

5,040 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
How do I input and solve a system of differential equations in matlab
I recommend you visit the Ordinary Differential Equations category in the documentation. Several of the Topics pages listed in t...

2 hours ago | 0

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User inputs for publish
To me, publishing is intended as a non-interactive activity. You should be able to start the publishing process, go get a cup of...

3 hours ago | 1

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How does mat2cell work?
Let's try this with a slightly smaller matrix, so you can see what's going on. A = reshape(1:24, [3 8]) Let's slice this into ...

5 hours ago | 0

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How do I do a Matlab assignment (report)?
Assuming this is homework, you should probably ask your professor about the format of the report they expect you to submit. You...

18 hours ago | 0

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I have a question
You did not end the command you executed immediately before calling imshow(d) with a semicolon. I'm guessing that command was a ...

1 day ago | 1

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how do I generate new random number every time I run a exe file?
See this documentation page that discusses why random numbers repeat after startup.

1 day ago | 0

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How to interpolate under specific condition?
If you were using release R2020b or later, I would recommend calling the fillmissing function with the 'MaxGap' option. I'm leav...

1 day ago | 1

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Different results for the same equation
lambda(1) is displayed the same as lambda(3) but its value is not identical to the value of lambda(3). A = [-10 10 -15; 10 5 -3...

1 day ago | 0

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Plotting a random walk step by step
You're adding a new line to the axes each time you want to put a new point down. That's numberOfWalks times stepsPerWalk differe...

1 day ago | 0

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Error with validate attribute
Nowhere in your message did you show the error you received. Please show all the text displayed in the Command Window in red and...

2 days ago | 0

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calculate a grade of students
%purpose is showing grades of 102 students and assign a letter grades %the grades will be random numbers between 0 to 100 clc;...

2 days ago | 0

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Unit testing with externally configurable parameters.
Write a parameterized test whose parameter is the port name. Inject a value for that parameter into the test when you create the...

2 days ago | 0

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Answered
C++ to matlab, anybody can help?
Are you trying to solve the same type of problem the matchpairs function does?

2 days ago | 0

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Ploting a Histogram with two data sets (One data set with respect to the other).
Do you want a 2-D histogram? x = [-9.3185, -9.2809,-9.2079,-9.1043,-9.1989,-9.1040,-9.1865,-9.0970,-9.0852,-9.0967,... -9....

2 days ago | 0

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Answered
square root of pi
I would have both the Area and Diameter properties depend upon a third (maybe public, maybe internal) property. Setting either A...

2 days ago | 0

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Create datetime from two columns of a table
I would use synchronize for this task. Let's start with some table data. v = (0:9).'; datePart = repmat("02-01-20", 10, 1); t...

2 days ago | 0

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How do you pass a variable between two different matlab apps
Have you tried following the procedure shown on this documentation page?

3 days ago | 0

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Changing the initial variables when passing into an ode45 solver
I would call the ODE solver three times. First, solve over the time span [0, 20]. Next, use the final value from that first OD...

3 days ago | 0

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Answered
Only the real part of the complex number is displayed
I believe you're using the bank display format (format bank) which does not show the imaginary parts of numbers. What would $4.5...

3 days ago | 0

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Error: Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters
When you define a function the inputs must be specified as variable names in the definition. [Slight oversimplification, but goo...

3 days ago | 0

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Colors in Matlab as a vriable
Do you want your users to select colors by name or by appearance? If the latter use uisetcolor.

3 days ago | 0

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Location of plot for subplot(2,2,3)
For a subplot(2,2,3), the plot is located in 3-rd position in 2x2 matrix form. Up to now the plot is placed in the lower left c...

3 days ago | 0

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Portable version of Matlab
Two other options that I believe did not yet exist when this question was originally asked in 2015 are MATLAB Online and MATLAB ...

4 days ago | 0

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f(x) is different of f(value of x)
The value stored in an array is not necessarily the same value that is displayed. Right now Forbes magazine lists the net worth...

4 days ago | 0

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I can't install Matlab on my M1 Mac mini.
See this post.

5 days ago | 0

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Conditional with time in ode45
Solve the system from time t = 0 to time t = 300 with the first value of upsilon. Use the value of the solution at t = 300 as th...

5 days ago | 1

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How can I install Matlab R2013a on macOS 11.1?
This post states MATLAB release R2020b and later are supported on Big Sur and that earlier releases are not supported. The syst...

5 days ago | 0

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How to plot string on X-axes and number in Y-axes in figure?
This doesn't do what you think it does. x_axes=['Case-1','Case-2','Case-3','Case-4'] Instead use a string array or a cell arra...

8 days ago | 0

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Cannot find highlight function
The description of the first input argument H listed on the documentation page indicates it must be a GraphPlot object created b...

8 days ago | 0

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Converting char array into string cells
Rather than creating a cell array containing char vectors, why not create a string array? x = [0 1 3 0]; s = string(x) three ...

8 days ago | 1