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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Content Feed
MATLAB won't launch (though installed and activated) on Mac Monterey
Please contact Technical Support and work with the Support staff to determine why MATLAB is not able to start on your machine.
6 hours ago | 0
I need to create a script that demonstrates the use of this function
You've asked effectively this same question several times before just with different functions. Generalize the advice you recei...
7 hours ago | 0
How can I use equations from a matrix, using symbolic variables, inside the function file for ode45 ?
It is possible to perform calculations using symbolic variables inside the function file whose handle you pass into ode45 as the...
7 hours ago | 0
How do I create a (10,10) matrix containing numbers from 1 to 100?
Another solution using implicit expansion (which wasn't available back in 2013 when this question was posted): n = 10; A = (1:...
1 day ago | 0
How to edit matlab toolbox globaloptim
To get information on the progress of the solver change the Display, OutputFcn, and/or PlotFcn options when you call the ga func...
1 day ago | 1
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Is there a way to convert times in this format to double, so I can perform mathematical operations on them?
How do you know that 100 represents 1 PM instead of 1 AM? Would it make more sense to adjust x so it includes 1300 instead of 10...
2 days ago | 0
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Solllvinf first order dffnt eqn
If you're going to put spaces around the operators separating terms in the matrix you're creating in example, be consistent. y0...
2 days ago | 0
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Sprintf problems while trying to format a directory name followed by a string
The backslashes and the characters following them are being treated as escape-character sequences. See the second line in the de...
2 days ago | 2
Compiled App: previously accessible file is now inaccessible
From the documentation: "MATLAB Runtime only works on MATLAB code that was encrypted when the deployable archive was built. Any ...
6 days ago | 0
How to find the index of the minimum value in a matrix.
Since you're using release R2021b (according to the information listed on the right side of this page) you can use 'all' as the ...
7 days ago | 0
isequal command suddently stops working
So how different are the two datetime arrays you expected to be equal? Do they just look equal? T = datetime('today') N = date...
7 days ago | 1
How to call a function with multi variable in real coded GA in function handle and how to define upper and lower bound of that variable in matlab?
If you've defined Torque to accept 3 inputs as per the code at the end of this answer, you can still use that function in your g...
7 days ago | 0
calculate the minimum probability
Assuming they are the same class and size, you can concatenate them and call min with a dimension input. A = randi([-5, 5], 4) ...
7 days ago | 0
Write sections of a long string as new lines in a text document
sub = 'XYZYXYZYZYZXYZYXYZ0XYXYXYX'; sub2 = replace(sub, '0', newline)
8 days ago | 1
bitget function working explanation needed
Here's an unsigned 8-bit integer. x = 0b10011010u8 % x is 10011010 The lowest order bit of x is 0. This makes sense since x is...
11 days ago | 0
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How can I create this script??
If you're trying to create examples like the ones in this part of the documentation take a look at the tools described on this d...
12 days ago | 0
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How to turn a function handle with 3 inputs (1 variable and 2 parameters) and then assign the inputs parameters and get a function handle with one input? ?
Let's look at the actual time difference between the two approaches. y=1; z=1; f=@(x,y,z)x+y+z; g=@(x)f(x,y,z); h = @(x) x+...
12 days ago | 0
how can I plot in symbolic math with defined x axis limit and Y axis limit with marker at specific points
syms x T=[1 x x^2 x^3]; l=1; N=[1 0 0 0;0 1 0 0;-3/l^2 -2/l 3/l^2 -1/l;2/l^3 1/l^2 -2/l^3 1/l^2]; g=[1 2 3 4]'; f=T*N*g; ...
12 days ago | 0
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How to generate random coordinates and store the values?
The easiest solution is not to use a for loop at all. p = randi([-10 10], 5, 2) If you must use a for loop, preallocate p to b...
13 days ago | 0
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Standard keyboard shortcut editor
You can customize the keyboard shortcuts via the Preferences window. You can change individual actions or you can change between...
13 days ago | 1
Can't create a folder outside of the current directory
Use fullfile instead of manually concatenating the path and file name then use the function form of mkdir rather than the comman...
14 days ago | 0
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Standolane application is not working like in app designer
That picture suggests there is an issue but it doesn't say anything about what that issue is. Can you review the log file linked...
16 days ago | 0
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hi i want to ask,why matlab cannot process the condition for the while loop ? Thank you!
Since you're using the short-circuiting or operator you should check the size of the inputs first. Rather than asking if they're...
16 days ago | 0
Why is opening a file in compiled mode different than direct Matlab mode?
If you're trying to have your compiled application run code that was not present and included in the application at the time the...
19 days ago | 0
How to compare two non-integer value together?
Is what you're trying to do as simple as just multiplication and relational operators? x1=85.36; x2=73.52; x2 >= 0.8*x1
20 days ago | 0
does two polygons interest or not?
You may be able to use the approach from this blog post that determines if two states (represented as polyshape objects) share a...
20 days ago | 1
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why I cant use laplace?
which -all laplace The laplace function is only defined for symbolic inputs. Your ut is not symbolic, it is a numeric array. A...
20 days ago | 0
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Does lidarViewer app exist?
The last line of the documentation page for that app says "Introduced in R2021b". If you're using release R2021a (as indicated b...
21 days ago | 0
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Saving values from a for loop in a table
temp = [1;2;4;5;1;8;3;4]; % temperature ind = [1;1;1;1;2;2;2;2]; % index cycle = [1;1;2;2;1;1;2;2]; % cycle f = table(cycle,t...
21 days ago | 0
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