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Steven Lord


MathWorks

3.196 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
why this logical expression is wrong?
This is a bug. See Bug Report 1839169.

1 día ago | 2

Answered
Hi, I am facing difficulty in plotting these functions.
I want to plot y1 and y2 such that after 24 at the x coordinate, y1 and y2 arrive from 0 at x coordinate and the value of y1 at ...

1 día ago | 0

Answered
Random assignments through the use of a MatLab programmed Calender
Since is the assignment problem, and that Wikipedia page suggests solving it as a linear program, one place to start would be th...

2 días ago | 0

Answered
Combine numeric and character array to display to operator
Using a listdlg as Star Strider suggested would be my first thought. But if the files all have the exact same naming pattern ("f...

2 días ago | 1

| accepted

Answered
Out of memory. The likely cause is an infinite recursion within the program.
Your first call to Vout calls itself on this line: volume_out=Vout(t(n))*DT; %ft^3 That second call to Vout calls itself. Tha...

2 días ago | 0

Answered
Mean value of two variables from an array with less than condition.
Geoff Hayes: as of release R2018b, as long as all the elements of x(1:end-1, 1) are positive integer values, it's valid ... but ...

2 días ago | 1

| accepted

Answered
Buying Matlab license by other company
Please send this question to the Sales department using the Contact Us button (the telephone icon) in the upper-right corner of ...

2 días ago | 0

Answered
license number doesnt work
If you received this license number from your IT staff with instructions on how to install, I recommend contacting them for assi...

2 días ago | 0

Answered
changing sequence in sequence
Concatenate the variables you want to consider in the sorting order into one matrix, with each variable a separate column. Call...

3 días ago | 0

Answered
Monthly turnover where I need the sum
If all the entries in the Time variable in your table were valid date strings that datetime could understand, I would first conv...

3 días ago | 0

Answered
Why do the fitting coefficients for polyfit change depending on the number of outputs?
See the third item in the Description section of the polyfit documentation page. That third output tells MATLAB to center and sc...

3 días ago | 0

| accepted

Answered
Is the Distributed Computing Toolbox finished?
Distributed Computing Toolbox was renamed Parallel Computing Toolbox in release R2008a and it is still called Parallel Computing...

3 días ago | 4

| accepted

Answered
How can I do graph matching?
It sounds like you're not working with a network graph object but with a series of images. If so something more along the lines ...

3 días ago | 0

Answered
How to control graph layout
I don't believe any of the methods available in the layout function for graph and digraph objects will give you that exact confi...

3 días ago | 1

| accepted

Answered
Change the format of x axis in a Kernel density plot.
I suspect when you called semilogx as you said in your answer that probably should have been a comment you plotted on a linear a...

3 días ago | 0

Answered
YAxis property of an Axes read-only, but XAxis and ZAxis are not.
I needed to write code that saved the properties of the axes handle and then removed the read-only properties from the structure...

4 días ago | 0

| accepted

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...

5 días 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...

5 días 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...

5 días ago | 1

| accepted

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...

5 días 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...

9 días ago | 0

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

9 días ago | 0

| accepted

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

9 días ago | 0

| accepted

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...

9 días 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...

9 días 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...

9 días 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...

10 días 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...

10 días ago | 0

| accepted

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...

10 días 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...

10 días ago | 0

| accepted

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