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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Matlab gave me a right value for PA< PB< PZa ,PZb, Pzc but they said the wrong thing about conclusion, they said " does not equl. However, it will equal
I was going to execute this code so we could see what your fprintf statements displayed, but you did not define the variables I ...
15 hours ago | 0
Hierarchy Parent/Child from same class
I would like to add Parents and Childs between object of the same class. Do you mean you're writing a class and you want each ...
1 day ago | 0
how to find my activatin key number
If you're trying to use your company or educational institution's license, ask whoever maintains the organization's software lic...
5 days ago | 0
deactivate old coimputer in order to activate new coimputer
See the instructions in this Answers post.
7 days ago | 0
| accepted
sub2ind() errors out with NaN inputs - handled differently since R2024a
This was a bug fix introduced in release R2024a.
9 days ago | 2
Table.Properties.VariableNames will add ... to long Variable Names
Is that an artifact of how the cell array is displayed in the Workspace (which I suspect is the case) or how the data is stored ...
13 days ago | 1
| accepted
MATLAB 2023b Keeps Crashing on My Windows Desktop But Works on Laptop
Can you check if you're using one of the processors listed in this Answers post?
14 days ago | 1
Wind rose with no degrees for direction
Let's make some random direction data. directions = ["N", "NE", "E", "SE", "S", "SW", "W", "NW"]; n = numel(directions); angl...
15 days ago | 0
The memory use of a sparse matrix depends on its history
The amount of memory required by a sparse matrix is not just a function of the number of rows and columns but also the number of...
15 days ago | 2
How to find the execute but don't display output syntax of a loop?
FYI, this wasn't available when the question was originally asked but as of release R2024b you can tell MATLAB to stop whenever ...
16 days ago | 0
Matlab 2024b won't open on Windows 11
Scanning through the Bug Reports for MATLAB release R2024b, I found two that might cause MATLAB to not be able to open. See Bug ...
23 days ago | 0
operator '==' not supported for operands of type 'cell'
Another possibility for the original question would be to create a pivot table or to use groupcounts or other grouping functions...
23 days ago | 0
MATLAB Incorrect number or types of inputs or outputs for function solve.
Let's choose a small value for n (since the input command cannot run on MATLAB Answers) and see what you're trying to pass into ...
28 days ago | 0
Numerical integration of N by 1 matrics
See the trapz and cumtrapz functions.
30 days ago | 0
| accepted
I am trying to recreate a plot from a literature review. It is a scatter graph but the axis are labels more than specific numbers
I'm not certain what the significance of the unlabeled horizontal lines are, but you can create a scatter plot with categorical ...
1 month ago | 0
Is it better to use tic/toc or a timer function for tracking time?
If you want to retrieve the current time, use: dt = datetime('now') To retrieve it as text data: s = string(dt) Depending on...
1 month ago | 0
| accepted
isnan to conver nan to zero in a table
Let's make a sample table with some NaN values and a non-numeric variable. A = magic(4); A(randperm(numel(A), 3)) = NaN; T = ...
1 month ago | 1
| accepted
Why are my licenses not linking to my account
I assume you are one of your company's license administrators? If so please contact Customer Service directly using this link an...
1 month ago | 0
How to convert python scipt to matlab using any matlan converter or else
I would see if the "Call Python from MATLAB" section linked from this documentation page provides the functionality you need.
1 month ago | 1
Find closest value in array
As of release R2021b, you don't need to use abs on the input to the min function. Use the 'ComparisonMethod' option to tell MATL...
1 month ago | 1
remove non-unique columns even if the sign has changed
Make a copy of newca1, let's call it M. Multiply each column of M whose first element is negative by -1. This way if you think o...
1 month ago | 0
Error using Matlab's publish function to create a pdf
I tried searching our internal bug database but I didn't find anything that looked exactly like this issue. I've reached out to ...
1 month ago | 0
Request for Cancellation of Full Toolbox Tutorial and Reversion to Original Trial State
Please contact Customer Service directly using this link with this request.
1 month ago | 1
Clicking on hyperlink for an "example" on MATLAB command line help changes my current directory
Do you want to read the example and potentially run some or all of it? I think that's a pretty common workflow for the examples....
1 month ago | 0
How does code sharing work in MATLAB?
Some of the functionality listed in the Software Development Tools category in the MATLAB documentation was not available in 202...
1 month ago | 1
cant get object's method to return multiple outputs
From the error message I suspect the class overloads indexing, either by overloading subsref or using one or more of the indexin...
1 month ago | 0
| accepted
defining upper and lower limits of a matrix
If you were using release R2024a or later (or if upgrading is an option) you could use the clip function. M = magic(5) M2 = cl...
1 month ago | 1
sprintf
This wasn't an option when the question was originally asked, but in more recent releases I recommend storing the names as a str...
1 month ago | 0
keep exact position of subplot axes
To clarify, when you say "position" do you mean the location of the subplot axes in the figure window, the limits of the axes (s...
1 month ago | 0
Trouble parsing ISO8601 date strings into datetime
Looking at the description of the Format property on the documentation page for the datetime function I think you want ZZZZZ or ...
2 months ago | 2
