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Steven Lord


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MathWorks

3,821 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
Non-integer values inside "Randi" function
If you want uniformly distributed random numbers that are not integers, randi is not the right tool for the job. See the example...

14 hours ago | 1

Answered
Is it possible to write argmin in the equation for MATLAB live script ?
What specifically do you mean when you say argmin? Do you mean the location of the minimum element in a vector? See the second ...

18 hours ago | 0

Answered
confusing regarding two cases of multiplication in MATLAB?
See this documentation page for a discussion of the difference between array operations and matrix operations, including example...

23 hours ago | 0

Answered
Unsure what I did wrong
Don't try to raise exp(1) to the power of x. Just use exp on the array x directly. x = 1:5; y = exp(x);

1 day ago | 2

Answered
About Newton's method
As you've written your code F isn't a function. It's a numeric array. That means F(u(n-1)) is an attempt to get whatever is in e...

2 days ago | 0

Answered
Will MATLAB provide Bert word embedding support?
In general we don't discuss future plans. If you believe we should include this word embedding model in our products, please sub...

3 days ago | 0

Answered
using command to operate cftool
I don't believe there is a programmatic API for cftool. You probably want to use the programmatic workflows described on this do...

3 days ago | 0

Answered
Getting handles of lines and deleting last 2 line plots
I wouldn't assume that the first two elements of the array returned by findobj were the last two lines created. I don't think th...

3 days ago | 0

Answered
wind speed versus time ....mathematical expression
If you want to perform regression, see this page discussing linear regression and this one discussing nonlinear regression. You ...

3 days ago | 0

Answered
Number output when using syms
Call vpa or double on the symbolic expression.

4 days ago | 0

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Answered
scalar vs matrix vs vector vs array??
Please see the Description sections on the documentation pages for the isscalar, isvector, and ismatrix functions for a definiti...

4 days ago | 0

Answered
Please help to fix this error "First input argument must be a function handle".
for m = 1:N zm(m) = (m - 0.5)*dz - h; r(m) = @(z) sqrt(a^2 + (zm(m)-z).^2); K(m) = @(r)(exp(-1i*k*r(m)))/(r(m)) ...

4 days ago | 0

| accepted

Answered
dec2base working differently on a matrix than on individual values
That's not the first element in M. That's the first element that the Command Window scroll buffer contains. Previous rows in the...

4 days ago | 2

Answered
vlookup type matrix creating
Since this sounds like it might be a homework question, I'm only going to point you in the direction of a useful function: ismem...

4 days ago | 1

| accepted

Answered
the meaning of basic matlab words
The word "handle" has at least two different (somewhat related) meanings in MATLAB. A handle object is an object where differ...

4 days ago | 0

| accepted

Answered
How can I draw non planar graph in 3D dimension
Call plot and specify the 'Layout' to be one of the 3-D layouts, 'force3' or 'subspace3'. Alternately you can specify 'XData', '...

4 days ago | 0

Answered
Insatlling Matlab 7.04 (R14SP2) on Windows 10
Running release R14SP2 (which was released in March 2005) on Windows 10 (released in July 2015, over ten years later) is not a s...

5 days ago | 0

Answered
Need to add an admin to license number: 719588
To add / remove / change administrators on your license please follow the instructions on this MATLAB Answers post. As the last ...

5 days ago | 0

Answered
Go through the table with a loop and change values
The standardizeMissing function can accept arrays of various types, including table arrays and timetable arrays. If you only wan...

5 days ago | 1

Answered
How can I convert douvle value to int or Integer?
Do you need to convert to an integer data type or is converting to an integer value (if it's not one already) sufficient? If ...

5 days ago | 0

Answered
Creating Phase Plane graphs/portraits
Use odeset to create options to pass into one of the ODE solvers in MATLAB. In your odeset call set the 'OutputFcn' option to @o...

5 days ago | 0

Answered
Matlab Solving Muller Method
f0=@(m0) (g*m0/c)*(1-e^(-c*t/m0))-v; Nowhere have you defined e. If you wanted to compute the exponential, instead just call th...

5 days ago | 0

Answered
checking dataType instead typecast at property or argument validation
If you specify both a property validator function and a class name, I believe MATLAB will cast the property name you try to set ...

6 days ago | 0

Answered
shortest path algorithm based on a recursive function
If you have a (small, simple) test case where the answer your code gives differs from the answer you expected it to give, have y...

6 days ago | 0

Answered
else if inside for loop.
for i=1:numel(u) Bxcf(i)= (((1.2566e-6 * I)/(4* pi * dxc(i))) * (1.8/(sqrt((dxc(i))^2+((1.8^2)/4))))); for i=1:n...

6 days ago | 0

Answered
Long term support of ActiveX
See this documentation page for more information. If you have use cases that would not be satisfied by the recommendations on th...

6 days ago | 0

Answered
Calculating the area of a plot, e.g convhull
Consider using an alphaShape instead of a convex hull since your shape isn't convex.

7 days ago | 0

Answered
Assign Value to a Specific Position
Take a look at the two-output form of the max function. That should provide you enough information to complete that task.

7 days ago | 0

Answered
finding nonzero elements in matrix
Use implicit expansion. A = [0 1 1; 0 0 1; 1 1 1]; R = (1:size(A, 1)).'; B = A.*R

7 days ago | 1

Answered
support for Variable fonts
You can customize the fonts MATLAB uses by following the instructions on this documentation page.

10 days ago | 1

| accepted

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