Steven Lord
MathWorks
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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 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日 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...
8日 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...
12日 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...
14日 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...
15日 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...
21日 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. ...
23日 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.
25日 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...
29日 前 | 0
| 採用済み
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 ...
29日 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.
約1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.
約1ヶ月 前 | 0
回答済み
How to keep formatting when cutting and pasting to office
Try right-clicking in the email and selecting "Keep Source Formatting" under Paste Option in the context menu that comes up.
How to keep formatting when cutting and pasting to office
Try right-clicking in the email and selecting "Keep Source Formatting" under Paste Option in the context menu that comes up.
約1ヶ月 前 | 0
回答済み
Timetables not fully supported by plot tools?
Let's say that with basic fitting, you wanted to fit a quadratic (y = a(1)*x^2+a(2)*x+a(3)) to your data. If the x data was doub...
Timetables not fully supported by plot tools?
Let's say that with basic fitting, you wanted to fit a quadratic (y = a(1)*x^2+a(2)*x+a(3)) to your data. If the x data was doub...
約1ヶ月 前 | 0
回答済み
Dealing with Duration format
Use detectImportOptions to see how MATLAB would decide to import the data by default based on the contents of the file. Once you...
Dealing with Duration format
Use detectImportOptions to see how MATLAB would decide to import the data by default based on the contents of the file. Once you...
約1ヶ月 前 | 0
回答済み
Request to rehost MATLAB network license (1102419) to new server IP
Please contact Customer Service or Technical Support directly using this link.
Request to rehost MATLAB network license (1102419) to new server IP
Please contact Customer Service or Technical Support directly using this link.
約2ヶ月 前 | 0
回答済み
Why are the functions constSincNet and SincNetLayer absent in the "Speaker Identification Using Custom SincNet" example?
Please click on the "Copy Command" button in the upper-right corner of the example page then paste that command into MATLAB and ...
Why are the functions constSincNet and SincNetLayer absent in the "Speaker Identification Using Custom SincNet" example?
Please click on the "Copy Command" button in the upper-right corner of the example page then paste that command into MATLAB and ...
2ヶ月 前 | 0
| 採用済み
回答済み
webread can't read the table of a website
Are you trying to read in the data sets? If so I'd look at the "Download Dataset" link in the upper-right corner. Once you have ...
webread can't read the table of a website
Are you trying to read in the data sets? If so I'd look at the "Download Dataset" link in the upper-right corner. Once you have ...
2ヶ月 前 | 0
回答済み
Add a datestr to duration data to get in datestr format
Rather than using date strings or serial date numbers, use datetime arrays. x = 1:10; dt = datetime(2025, 12, x); y = x.^2; ...
Add a datestr to duration data to get in datestr format
Rather than using date strings or serial date numbers, use datetime arrays. x = 1:10; dt = datetime(2025, 12, x); y = x.^2; ...
2ヶ月 前 | 1
| 採用済み
回答済み
Find position of cell array within another cell array or table or in a structure
Are you using a graph or digraph object? Do you have the additional struct information stored as a separate variable or have you...
Find position of cell array within another cell array or table or in a structure
Are you using a graph or digraph object? Do you have the additional struct information stored as a separate variable or have you...
2ヶ月 前 | 0
回答済み
Why does uint64([9007199254740993]) results in 9007199254740992? What happens to the least significant bit?
MATLAB recognizes this: x = uint64(9007199254740993) as a literal constant being used to construct a uint64 variable. It doesn...
Why does uint64([9007199254740993]) results in 9007199254740992? What happens to the least significant bit?
MATLAB recognizes this: x = uint64(9007199254740993) as a literal constant being used to construct a uint64 variable. It doesn...
2ヶ月 前 | 2
回答済み
Using fprintf for complex numbers
You may want to use + in the format specifier. A = [3+4i, 5, 6-7i] fprintf("%d%+di\t", [real(A); imag(A)])
Using fprintf for complex numbers
You may want to use + in the format specifier. A = [3+4i, 5, 6-7i] fprintf("%d%+di\t", [real(A); imag(A)])
2ヶ月 前 | 0
回答済み
I want to suppress: useCS = logical 1 in command window
You can tell MATLAB to enter debug mode when unsuppressed output occurs. Use this to determine where the semicolon on the line t...
I want to suppress: useCS = logical 1 in command window
You can tell MATLAB to enter debug mode when unsuppressed output occurs. Use this to determine where the semicolon on the line t...
3ヶ月 前 | 0
回答済み
what's my license number?
If you're asking how to find your license number inside MATLAB, call the license function. If you're trying to use your company...
what's my license number?
If you're asking how to find your license number inside MATLAB, call the license function. If you're trying to use your company...
3ヶ月 前 | 1
回答済み
Returning line before after searching for pattern
A is a logical array with the same number of rows as the string array readfile. So if you remove/ignore the first element of A, ...
Returning line before after searching for pattern
A is a logical array with the same number of rows as the string array readfile. So if you remove/ignore the first element of A, ...
3ヶ月 前 | 0
| 採用済み
回答済み
Why does having only one row in table, break dot indexing?
Let's make some sample data. C = cell(10, 1); actualHeights = zeros(size(C)); for k = 1:height(C) h = randi(10); ac...
Why does having only one row in table, break dot indexing?
Let's make some sample data. C = cell(10, 1); actualHeights = zeros(size(C)); for k = 1:height(C) h = randi(10); ac...
3ヶ月 前 | 0
回答済み
Simulink closes without any warning, message, error or reason **Tons of hours of work lost every single day**
Searching the Bug Reports for Simulink in release R2024b for the word "crash" finds 42 hits. I recommend reading through the sum...
Simulink closes without any warning, message, error or reason **Tons of hours of work lost every single day**
Searching the Bug Reports for Simulink in release R2024b for the word "crash" finds 42 hits. I recommend reading through the sum...
3ヶ月 前 | 0
回答済み
go back to previous if condition from an elseif in for loop
I would probably turn your disp calls (which I'm assuming are placeholders for what you're actually doing in those cases) into f...
go back to previous if condition from an elseif in for loop
I would probably turn your disp calls (which I'm assuming are placeholders for what you're actually doing in those cases) into f...
3ヶ月 前 | 0
回答済み
Defining a function in one file and using it in a second file
Script files Inside of a script file, all functions defined inside it are local functions. That means they can only be called d...
Defining a function in one file and using it in a second file
Script files Inside of a script file, all functions defined inside it are local functions. That means they can only be called d...
3ヶ月 前 | 0
回答済み
Error getting in.
I'm guessing that you are receiving a licence manager error when you try to start MATLAB. If that's the case, add the license ma...
Error getting in.
I'm guessing that you are receiving a licence manager error when you try to start MATLAB. If that's the case, add the license ma...
3ヶ月 前 | 0
