Steven Lord
MathWorks
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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How can I dynamically create and configure a subclass of an abstract class from a file or script in one step in MATLAB?
As written, each time you add a new type of Vehicle you need to modify Garage to be able to handle that new type of vehicle. Thi...
How can I dynamically create and configure a subclass of an abstract class from a file or script in one step in MATLAB?
As written, each time you add a new type of Vehicle you need to modify Garage to be able to handle that new type of vehicle. Thi...
21日 前 | 0
回答済み
Access to downloads for install
If you already have a license but need information on where/how to download the software to be installed, please contact Custome...
Access to downloads for install
If you already have a license but need information on where/how to download the software to be installed, please contact Custome...
22日 前 | 0
回答済み
How to find a function in the path - securely?
The complexity explodes, such that a simple task like searching a function file needs a pile of exceptions and indirections. S...
How to find a function in the path - securely?
The complexity explodes, such that a simple task like searching a function file needs a pile of exceptions and indirections. S...
23日 前 | 1
回答済み
computation of symbolic terms and error analysis
You indicated you've already found the solution (the expression you're trying to convert to double still has symbolic variables ...
computation of symbolic terms and error analysis
You indicated you've already found the solution (the expression you're trying to convert to double still has symbolic variables ...
27日 前 | 0
回答済み
Can you get matlab to add a really small number to a big number and retain precision
p = -1e17 + sqrt(1e34 + 1e18) p is in fact exactly 0 if you do the calculation in double precision. p == 0 % true Why didn't ...
Can you get matlab to add a really small number to a big number and retain precision
p = -1e17 + sqrt(1e34 + 1e18) p is in fact exactly 0 if you do the calculation in double precision. p == 0 % true Why didn't ...
28日 前 | 3
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trainnet function - randomness and repeatability
What happens when you reset the state or seed of the random number generator before each attempt to train the network? Let's cho...
trainnet function - randomness and repeatability
What happens when you reset the state or seed of the random number generator before each attempt to train the network? Let's cho...
約1ヶ月 前 | 0
| 採用済み
回答済み
Trying to solve for a number of variables in a matrix. Getting a structfun error.
Let's look at what solution is after the call to solve. I just added in a few semicolons to suppress some of the output. E = 10...
Trying to solve for a number of variables in a matrix. Getting a structfun error.
Let's look at what solution is after the call to solve. I just added in a few semicolons to suppress some of the output. E = 10...
約2ヶ月 前 | 0
回答済み
Financial Toolbox installed but bndprice function not found
According to the output of ver that you posted, you're using MATLAB Online (basic). According to the FAQ on the page describing ...
Financial Toolbox installed but bndprice function not found
According to the output of ver that you posted, you're using MATLAB Online (basic). According to the FAQ on the page describing ...
約2ヶ月 前 | 0
回答済み
Reading a string & sorting it into usable variables
Let's take a sample string. S = "Layup: [45/-45/0/90/90/0/-45/45]"; Get the text after the leading [ S2 = extractAfter(S, "["...
Reading a string & sorting it into usable variables
Let's take a sample string. S = "Layup: [45/-45/0/90/90/0/-45/45]"; Get the text after the leading [ S2 = extractAfter(S, "["...
約2ヶ月 前 | 0
回答済み
I have downloaded this package, but can not seem to use the "readDistance' command.
Searching the documentation for functions named readDistance, I found two hits on the first page. The first one requires the MA...
I have downloaded this package, but can not seem to use the "readDistance' command.
Searching the documentation for functions named readDistance, I found two hits on the first page. The first one requires the MA...
約2ヶ月 前 | 1
回答済み
Dialog box Unable to resolve the name 'matlab.io.internal.xlsreadSupportedExtensions' error prevents me from opening a file
The fact that the error occurs on line 5 of pad (which in my installation of release R2025b is completely blank) in a call to re...
Dialog box Unable to resolve the name 'matlab.io.internal.xlsreadSupportedExtensions' error prevents me from opening a file
The fact that the error occurs on line 5 of pad (which in my installation of release R2025b is completely blank) in a call to re...
2ヶ月 前 | 0
回答済み
MATLAB standalone App Dynamic Class
From the documentation "MATLAB Runtime only works on MATLAB code that was encrypted when the deployable archive was built. Any f...
MATLAB standalone App Dynamic Class
From the documentation "MATLAB Runtime only works on MATLAB code that was encrypted when the deployable archive was built. Any f...
2ヶ月 前 | 0
回答済み
Indexing behavior of table properties
In the former case, it is table's indexing code that is performing all the indexing steps. It knows how to index into the proper...
Indexing behavior of table properties
In the former case, it is table's indexing code that is performing all the indexing steps. It knows how to index into the proper...
2ヶ月 前 | 1
| 採用済み
回答済み
pathdef and resulting path very long
If you have a lot of products and/or add-ons in your installation, the path may have a lot of entries. V = ver; S = split(path...
pathdef and resulting path very long
If you have a lot of products and/or add-ons in your installation, the path may have a lot of entries. V = ver; S = split(path...
2ヶ月 前 | 0
| 採用済み
回答済み
fread a double that's been broken up into four 16 bit words
Let's make four random 16 bit integers. A = randi([intmin('uint16'), intmax('uint16')], 1, 4, 'uint16') Now we can typecast th...
fread a double that's been broken up into four 16 bit words
Let's make four random 16 bit integers. A = randi([intmin('uint16'), intmax('uint16')], 1, 4, 'uint16') Now we can typecast th...
2ヶ月 前 | 2
| 採用済み
回答済み
How to read in m-files into a Matlab-generated-Exe
From the documentation "MATLAB Runtime only works on MATLAB code that was encrypted when the deployable archive was built. Any f...
How to read in m-files into a Matlab-generated-Exe
From the documentation "MATLAB Runtime only works on MATLAB code that was encrypted when the deployable archive was built. Any f...
2ヶ月 前 | 0
回答済み
Where can I download matlab/simulink example projects?
You're probably not going to be able to run the whole example without all the products listed in the box in the upper-right corn...
Where can I download matlab/simulink example projects?
You're probably not going to be able to run the whole example without all the products listed in the box in the upper-right corn...
2ヶ月 前 | 0
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How do I use 'intersection' to get the overlapping line between two polyshapes?
These two polyshapes touch but do not intersect. x1 = [1 4 4 1]; y1 = [1 1 4 4]; x2 = [4 6 6 4]; y2 = [2 2 3 3]; poly1 = po...
How do I use 'intersection' to get the overlapping line between two polyshapes?
These two polyshapes touch but do not intersect. x1 = [1 4 4 1]; y1 = [1 1 4 4]; x2 = [4 6 6 4]; y2 = [2 2 3 3]; poly1 = po...
3ヶ月 前 | 1
回答済み
MATLAB crash during matrix multiplication in Matlab Function
Can you confirm that you've looked in the locations given in this Answers post and cannot find any crash log files created at th...
MATLAB crash during matrix multiplication in Matlab Function
Can you confirm that you've looked in the locations given in this Answers post and cannot find any crash log files created at th...
3ヶ月 前 | 0
回答済み
String to double conversion misunderstanding
The mistake is that you're using command form for calling the class function, not function form. These: class ACVoltageR class...
String to double conversion misunderstanding
The mistake is that you're using command form for calling the class function, not function form. These: class ACVoltageR class...
3ヶ月 前 | 2
回答済み
What is the proper way to clean up internal timers when deleting a MATLAB class object?
Depending on exactly how you're creating the timer object, if you're using release R2024b or later perhaps creating a weak refer...
What is the proper way to clean up internal timers when deleting a MATLAB class object?
Depending on exactly how you're creating the timer object, if you're using release R2024b or later perhaps creating a weak refer...
3ヶ月 前 | 0
回答済み
Determine which delaunayTriangulation Constraints correspond to input constraints?
I have not looked at the spatialgraph2D tool Matt J suggested, but I suspect you can do the same thing using functionality inclu...
Determine which delaunayTriangulation Constraints correspond to input constraints?
I have not looked at the spatialgraph2D tool Matt J suggested, but I suspect you can do the same thing using functionality inclu...
3ヶ月 前 | 0
回答済み
CAT12 fails in MATLAB R2025b due to WebGL/ANGLE OpenGL incompatibility, but works in R2023a
The Release Notes state, among other things: "Calling the opengl (R2025a) function has no effect. To query the graphics renderer...
CAT12 fails in MATLAB R2025b due to WebGL/ANGLE OpenGL incompatibility, but works in R2023a
The Release Notes state, among other things: "Calling the opengl (R2025a) function has no effect. To query the graphics renderer...
3ヶ月 前 | 0
回答済み
does installing toolbox that has different version than your matlab program cause a problem
For MathWorks toolboxes, I believe the Installer and Add-Ons Manager ought to disallow you from "mixing and matching" releases. ...
does installing toolbox that has different version than your matlab program cause a problem
For MathWorks toolboxes, I believe the Installer and Add-Ons Manager ought to disallow you from "mixing and matching" releases. ...
3ヶ月 前 | 0
回答済み
Unbale to write scrips and program in MATLAB for application level
I suggest you start with the free MATLAB Onramp tutorial to quickly learn the essentials of MATLAB.
Unbale to write scrips and program in MATLAB for application level
I suggest you start with the free MATLAB Onramp tutorial to quickly learn the essentials of MATLAB.
3ヶ月 前 | 2
回答済み
Mixing name/value pair syntax
Suppose I show you this call. How would you as a human interpret it, and how would MATLAB interpret it (were it syntactically le...
Mixing name/value pair syntax
Suppose I show you this call. How would you as a human interpret it, and how would MATLAB interpret it (were it syntactically le...
4ヶ月 前 | 0
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回答済み
I want to define inputs for the function quantized_signal
Are you asking in general about how to call functions in MATLAB? If so you probably want to look at this section of the Getting ...
I want to define inputs for the function quantized_signal
Are you asking in general about how to call functions in MATLAB? If so you probably want to look at this section of the Getting ...
4ヶ月 前 | 0
回答済み
Calculate mean and standard deviation from 30-years of global wind data
Consider using groupsummary, specifying the groupbins input argument to control how the data is discretized into bins.
Calculate mean and standard deviation from 30-years of global wind data
Consider using groupsummary, specifying the groupbins input argument to control how the data is discretized into bins.
4ヶ月 前 | 0
回答済み
can we give access to the external users
Please contact Customer Service directly using this link.
can we give access to the external users
Please contact Customer Service directly using this link.
4ヶ月 前 | 0
