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Steven Lord


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MathWorks

3.734 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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Contributions in
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Answered
How can I initialize nested handle class with independent values
The section titled "Initializing Properties to Handle Objects" on this documentation page states what happens when you initializ...

ongeveer 10 uur ago | 0

Answered
How do I Ctrl-R on Mac?
FYI to search for or customize the keyboard shortcuts, see the Keyboard preferences as described on this documentation page. Sea...

ongeveer 14 uur ago | 0

Answered
Matlab licensing administration questions
I recommend that you contact Technical Support directly with these questions, as they should be able to offer guidance specific ...

ongeveer 20 uur ago | 0

Answered
Why does categories(TableA.Var2) have more elements than the rows in TableA?
Your CarLineFaultCodes table only contains a subset of the rows of FaultCodesTable, and your ModuleFC table only contains a subs...

ongeveer 24 uur ago | 1

| accepted

Answered
Multiplication of two fields in a structure array
You made a typo on this line. Struct(i).dy_dc=(Struct(i).L1).*(sin(Struct.(i).phi1)); There shouldn't be a period between Stru...

2 dagen ago | 1

| accepted

Answered
definite integral not giving exact answer
Compute your limits of integration symbolically to avoid roundoff error. f = sym(4)/5; a = acos(f); inner_int = int(r*sin(phi...

2 dagen ago | 1

| accepted

Answered
Convert Columns Arrays to numeric
Using the example from the timetable help text: MeasurementTime = datetime({'2015-12-18 08:03:05';'2015-12-18 10:03:17';'2015-1...

2 dagen ago | 0

Answered
Parsing text files for Beginners
There are several ways to read this data in. While you can do this using a series of commands, an easier approach (especially if...

2 dagen ago | 0

Answered
Initializing multidimensional array and dynamic expansion
Build your size vector first. Ideally you have an upper bound on the number of dimensions: upperBoundOnNdims = 10; sizeVec = o...

2 dagen ago | 1

| accepted

Answered
Grid overlay on "plots()"
You want to turn grid on? Use the grid function.

3 dagen ago | 0

Answered
How to assign a class method as a ClickedCallback?
methods function h = get_save_handle( obj ) h = @obj.save; end end The name of the me...

3 dagen ago | 0

| accepted

Answered
Disp: "Dot indexing is not supported for variables of this type"
You've written or downloaded a disp.m file that's shadowing the built-in disp function. Run this code. which -all disp You wil...

3 dagen ago | 0

| accepted

Answered
Problem with if statement
If you want to check if element i of y is less than 2, that's not what your if statement says. It is checking all the elements o...

3 dagen ago | 0

Answered
How to get the address of libpointer?
Why do you need or want to get the address? If you're looking to iterate through the array, just use the + operator as shown by...

3 dagen ago | 0

Answered
Delete rows from a timetable with an specific criteria
See the "Select Rows with Logical Indexing" section on this documentation page for an example you can use as a model. That examp...

3 dagen ago | 1

| accepted

Answered
How to assign a symbolic variable to a location inside a matrix?
In your expression y(1, 1) = A the expression on the left of the equals sign refers to a double array while the expression on th...

4 dagen ago | 0

| accepted

Answered
can not run the file
When you say "it write[sic] error 5 when I run it", do you mean you receive License Manager Error -5 when you try to start MATLA...

4 dagen ago | 0

Answered
Optimization Toolbox Functions Available to Matlab Coder
The blue bar labeled "Documentation" near the top of the main documentation page for each MathWorks product should have a link t...

5 dagen ago | 1

| accepted

Answered
Anonymous function to class property method.
Note: you shouldn't call your class bar as that already has a meaning in MATLAB. Use this: fmincon(@(x) objfun(o.myfoo, x),x0,...

7 dagen ago | 0

| accepted

Answered
Use multidimensional Indices returned by max to get values from another array of same size
If you're using release R2019a or later, specify the 'linear' option to obtain linear indices from max and use those linear indi...

7 dagen ago | 0

| accepted

Answered
How to get multiple outputs from a function?
Retrieving two outputs from a function requires two steps. Define the function to return two outputs Call the function with tw...

7 dagen ago | 1

Answered
MATLAB script to simulate the sound of dialling any telephone number
If you just need a function that can play that sound, Cleve Moler's Numerical Computing with MATLAB toolbox (available from the ...

7 dagen ago | 0

Answered
Is there a way to add synchronize function to Matlab 2016a?
As Adam Danz said, this function was released in release R2016b. It also only works on timetable arrays, not table arrays, as yo...

7 dagen ago | 1

| accepted

Answered
Looks like a machine error
Your variables appear to contain the same values as the hard-coded constants, but looks can be deceiving. The small differences ...

7 dagen ago | 0

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Answered
Problem with symsum: not working with vector of matrix elements
If I understand what you're trying to do correctly, symsum is the wrong tool to use because you're trying to use that variable o...

7 dagen ago | 0

Answered
What read() function with <<1,'uint8'>> arguments returns afterall?
When you call the serialport function then call read on the ouput of that function, you're calling this version of the read func...

7 dagen ago | 1

| accepted

Answered
imshow not working when going from unit8 to double
How did you convert the image from uint8 to double? See this page in the Image Processing Toolbox documentation and this one in ...

8 dagen ago | 0

Answered
Changing variable name from input string
Rather than using eval or storing your "variable names" and your values separately, if the names are valid MATLAB identifiers yo...

8 dagen ago | 1

Answered
imwrite error saying 'TransparentColor' is not a recognized parameter
That argument appears in a section on the documentation page describing functionality available for the GIF format, not for the ...

9 dagen ago | 0

Answered
What am I missing while using cellfun & eval together
There's no need to use eval here. Instead, I would use table array indexing on y. I believe dynamic property indexing will work ...

9 dagen ago | 0

| accepted

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