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Steven Lord


MathWorks

3.180 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
Sort returns into quintiles rebalance monthly not enough input arguments
When you press the green triangle in the Editor (which I assume is what you mean when you said "when I press run") that attempts...

etwa 7 Stunden ago | 0

Answered
How to split a table based on date and hour
In addition to being able to specify 'day' as the newTimeStep input to retime you can specify a newTimes vector. Similarly, in g...

etwa 7 Stunden ago | 0

Answered
i have download RESNET50 file. how to install RESNET50 MLPKGINSTALL file.
If you're referring to this File Exchange submission, as the second and third paragraphs of the Overview section state: "Openin...

etwa 11 Stunden ago | 1

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Answered
installed, but will not run on windows 10
I recommend contacting Technical Support using the Contact Us icon (the telephone) in the upper-right corner of this page and wo...

etwa 12 Stunden ago | 1

Answered
Can you program a figure to execute the same callback after each child's callback?
Are you setting the figure object's CurrentObject property back to the figure object itself because your callbacks query the Cur...

4 Tage ago | 0

Answered
normalize hist3 plot
Use histogram2 instead of hist3. As stated in the "Alternative Functionality" section of the hist3 documentation page, histogram...

4 Tage ago | 0

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Answered
How to remove the outliers
Take a look at the filloutliers and rmoutliers functions on this documentation page.

4 Tage ago | 0

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Answered
Equivalent of "spparms" to track algorithm choice for dense matrices ?
Why do you need information about what the mldivide function (or the backslash operator \) is doing? How do you intend to use th...

4 Tage ago | 0

Answered
Write a function called eligible that helps the admission officer of the Graduate School decide whether the applicant is eligible for admission based on GRE scores. The function takes two positive scalars called v and q as in
Nowhere in your function do you define the variable admit the function returns as its output. You haven't shown the full text of...

4 Tage ago | 0

Answered
MATLAB 2018a readtable VariableNamesLine bug
t = readtable('C:\Users\Documents\.....CSV'); You called readtable with just one input argument? The options object returned by...

4 Tage ago | 0

Answered
I need a File Instillation key to download Matlab offline
I recommend starting first with the IT department at the University of Colorado Boulder. If they can't help you, then I would co...

5 Tage ago | 0

Answered
Sum according to the values in another column
Use groupsummary. C1 = [1 1 1 1 1 2 2 2 2 2 2 3 3 3 4 4 4 4].'; C2 = [5 10 12 35 3 1 4 26 5 11 12 8 2 22 8 2 5 7].'; [binva...

5 Tage ago | 0

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Answered
Figure without border?
When you say "figure" do you mean the figure object (the window on the screen) or the axes contained in the figure? I've seen pe...

5 Tage ago | 1

Answered
converting 3 arrays into matrix
You can't have an array in MATLAB whose element indices are non-integer values. If M is a matrix M(3.5, pi) will error (for exam...

5 Tage ago | 0

Answered
Histograms from point cloud
You said in your comment to Rik's answer that xyzPoints is size [2019 4063 3]. I assume therefore that the x data is the first p...

6 Tage ago | 1

Answered
Error in MATLAB median inside isoutlier function
You said you didn't overwrite any function, but did you download a function or a collection of functions or are you shadowing th...

6 Tage ago | 0

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Answered
logaritmical spacing / incremented spacing
Look at the spacing of the 1's in your vector. It looks like the second is 2 elements after the first, the third is 2 elements a...

6 Tage ago | 1

Answered
matlab.engine function returns only the first output
According to the "Return Multiple Output Arguments from MATLAB Function" section on this documentation page you need to call it ...

6 Tage ago | 0

Answered
Restore open files in Editor from previous sessions
If you're using release R2019a or later, consider using the Projects functionality introduced in MATLAB in that release to organ...

7 Tage ago | 0

Answered
atan2 & mod number not converges to correct value???
First, if you want angles in degrees use atan2d directly. But as for what you're seeing with ang2_ being 90.0000? Your angle is...

8 Tage ago | 0

Answered
Datetime conversion in numeric form (matrix)
Rather than converting your datetime array into a number to combine it with a numeric array, consider creating a timetable array...

8 Tage ago | 1

Answered
alpha shape vs convex hull volume value
Place your hand, palm down and fingers spread, on a piece of paper. Trace around it until you reach your wrist (where you would ...

11 Tage ago | 2

Answered
Why does it take so long to finish?
It really depends on what the code represented by "%some functions" does. When the function exits, all the variables (except the...

11 Tage ago | 0

Answered
Unable to install 2017b update
Please send the log file whose location is listed in that dialog to Technical Support using the Contact Us button (the telephone...

12 Tage ago | 0

Answered
Maintain data type during variable assignment
Subscripted assignment converts the data on the right side of the equals sign to the type of the variable on the left side (if t...

12 Tage ago | 0

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Answered
Matlab parallel processing failure
Quit debugging, turn off the Error Breakpoint "Pause on NaN or Inf", and rerun your code that starts the parallel pool. Interna...

12 Tage ago | 0

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Answered
Using polyfit for two y values
I agree with dpb. You have two very distinct data sets so fit two lines, one to each data set. If you're trying to fit the line...

13 Tage ago | 0

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Answered
I keep getting ode45 (line 115) and odearguments (line 90) errors
Your x0 input to lab2 is a scalar so when you passed that into ode45 that tells ode45 that you have one initial condition. Beca...

13 Tage ago | 0

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Answered
specify array with values
ismember isn't the right tool for this task. Use the greater-than (>) and less-than (<) operators. rng(0, 'twister'); x = rand...

13 Tage ago | 0

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Answered
Command Windows and editor in the same page
From the description you've undocked the Editor from the Desktop. As the next-to-last row in the first table on this documentati...

13 Tage ago | 0

| accepted

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