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Steven Lord


MathWorks

3.594 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
2 nearest neighbors of each side of vector
Are there specific operations you want to perform on those neighbors? The moving statistics functions on this documentation page...

etwa 19 Stunden ago | 0

Answered
Working With Matlab Tables
Use parentheses to extract a smaller table from a larger table or to assign a smaller table into a larger one. Use curly braces...

etwa 19 Stunden ago | 0

Answered
Error when trying to modify a code (vectors)
You can directly use the elements of a vector through indexing. You don't need to extract them into separate variables. w = [1 ...

2 Tage ago | 0

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Reset the order of table columns
If you're using release R2018a or later you could use the movevars function.

3 Tage ago | 0

Answered
missing toolboxes for function year
There is a year function in Financial Toolbox, but if you're working with date and time data I recommend storing your date and t...

3 Tage ago | 0

Answered
overly convoluted elseif condition
The approaches suggested by Bob Nbob and ME each work if the only values x can take in the range [1, 4] are integer values. If i...

3 Tage ago | 0

Answered
in matlab 2017a simulink is not open
See this Answers post.

3 Tage ago | 0

Answered
How I do evaluate a function handle in other function handle
g_1=@(x,y) y_p*p_y(f,x,y) + p_x(f,x,y); g_2=@(x,y) y_p*p_y(g_1,x,y) + p_x(g_1,x,y); . . . g_n=@(x,y) y_p*p_y(g_(n-1),x...

3 Tage ago | 0

Answered
How to apply netting in Adjacency matrix
This sounds like it might be a homework assignment, so I'm only going to give a hint. The transpose operator .' may be of intere...

3 Tage ago | 0

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Answered
Error in constrained delaunay triangulation
In a delaunayTriangulation, the constraint input C does not contain the coordinates of points that define a constrained edge but...

4 Tage ago | 0

Answered
Function definitions are not permitted in this context - Decoding_Toolbox
The ability to define local functions in scripts was introduced in release R2016b. Are you using an older release? If so you'll ...

4 Tage ago | 0

Answered
Matlab doesn't "Pause on Error" till Infinite recursion
Try setting a breakpoint on line 237 of wPLI_openfield. When MATLAB reaches that point, it will enter debug mode and the prompt ...

4 Tage ago | 1

| accepted

Answered
How to plot3D with inverse of matrix involved?
Look at the X and Y limits on your MATLAB plot, then look at the X and Y limits on the plot from Wolfram Alpha. MATLAB is givin...

4 Tage ago | 0

Answered
quadratic fit tool wrong coefficients
Because your parameters are so large, I strongly encourate you to center and scale your data as shown in step 7c in the first ex...

4 Tage ago | 0

Answered
Can someone propose some code that will "connect the dots" using circular arcs?
Are you trying to do something like path planning for an autonomous vehicle, passing through waypoints along the way? If so cons...

4 Tage ago | 0

Answered
defining a stuct variable
From the documentation for the struct function, when you have multiple fields being created in the same struct call: "If any of...

5 Tage ago | 1

Answered
List of built-in data sets, please
What do you consider a data set? The census MAT-file in toolbox/matlab/demos (used here among other places) seems like it's o...

5 Tage ago | 0

| accepted

Answered
Name a few variables from a vector
There is a function named deal that looks like it does something like what you're asking, but that assigns each of its inputs to...

5 Tage ago | 1

Answered
Command for setting MATLAB font preferences
Depending on which release you're using, use the settings function. In particular, you can set a TemporaryValue or PersonalValue...

5 Tage ago | 0

| accepted

Answered
Destruction of partially constructed class?
In this case you probably want to define a destructor (delete) method that supports destruction of partially constructed objects...

5 Tage ago | 0

Answered
Unrecognized function from Robust Control Toolbox
There's no syntax listed on the documentation page for the mixsyn function that shows it being called with zero input arguments....

5 Tage ago | 0

Answered
Unspecified coefficients from function 'fit'
Lowess smoothing is a type of nonparametric fitting. That output appears correct. There are other methods you can use if you wan...

5 Tage ago | 0

Answered
Can someone tell me what is wrong with this?
I'm guessing from the fact that you define x1 but don't use it that the x variable may not exist. You may have been thinking / h...

5 Tage ago | 0

Answered
How do you solve for a double sum
h=0; i=0.0195314; m=100 for m=1:512 for j=1:n for i=1:n-m h=h+(z(i+m,j)-z(i,j))^2; end end h=1/(n...

5 Tage ago | 1

Answered
ActiveX: how to pass a string array to cst in matlab?
sWidth={"0.5";"1.1";"2.2";"3.3"} The error message is accurate in that sWidth is not a string array. It is a cell array whose c...

5 Tage ago | 0

Answered
Patner relationship and problem diskussing
You can contact MathWorks corporate headquarters using the information on this webpage.

5 Tage ago | 0

Answered
Count Days in Months
The "Specify Step Size", "Compare Fixed-Length Duration and Calendar Duration Step Sizes", and "Dates and End of Month" sections...

6 Tage ago | 0

| accepted

Answered
Visualizing flow through graph networks
Set the NodeCData property of the GraphPlot object. p.NodeCData = G.Nodes.Value; colorbar % to see the mapping between value...

6 Tage ago | 1

Answered
Change distance between grouped bars (bars are overlapping)
From the documentation for the bar function, specifically the section that deals with the width input argument: "Bar width, spe...

6 Tage ago | 0

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