# Steven Lord

### MathWorks

Last seen: Today Active since 2002

Followers: 1   Following: 0

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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Combing Date and Time Variables into ONE DateTime Vector
So you have a datetime array and a duration array? n = 10; dt = datetime(2024, 6, randi(30, n, 1)) du = duration(randi(24, n,...

7 days ago | 0

make vectors same length using min function
x = [2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016]; y = [0, 0.05, 0.1, 0.15, 0.2]; a = [2008, 2009,...

7 days ago | 0

Error: Children may only be set to a permutation of itself
In programmatic code, ideally you should use a specific axes handle rather than trusting that gca returns the axes you think it ...

7 days ago | 1

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Join Subgraphs into a new Graph
G1 = graph(randi(10, 20, 1), randi(10, 20, 1)); G2 = graph(randi(10, 20, 1), randi(10, 20, 1)); Here I have two random graphs,...

7 days ago | 1

Find value of large number
Use Symbolic Math Toolbox. Define your constants symbolically. % Define the constants B_2 = sym(0.18525); H = sym('3000175332...

7 days ago | 0

Working with modified code -2024A
If your system of ODEs is taking a long time, it may be stiff. Try using one of the stiffer solvers. Alternately you could try ...

8 days ago | 0

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How to Create Slicing Number of 2D plots in matlab
Looking at this documentation page, I think what you want is slice.

9 days ago | 0

Calculate mean of all variables that have a mean
Instead of calling varfun twice as the answer posted by @Arun does, call it once with the InputVariables name-value argument. Th...

10 days ago | 1

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Assigning a line plot object to a global property doesn't retain it after the object is deleted
All of the handles to the line object (which is a handle object) are references to the same thing on the screen. If you delete()...

10 days ago | 2

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No se como crear un 4x1 polyshape with 3 properties
What is the data type and size of the cborders variable used on line 19 of your untitled2.m file? You could add this command imm...

11 days ago | 0

How to extract latitude and longitudes from a table given the timestamp range?
Use a timerange object as the row index into your timetable. Time = datetime({'12/18/2015 08:00:00';'12/18/2015 10:00:0';'12/18...

11 days ago | 0

How can I get script's location when running one section of a script?
Rather than depending on what is the current directory when running the code (which is subject to change when you're running the...

11 days ago | 1

Time format is changed to decimal when calling the time data from excel.
In matlab, when i read a time data (hh:mm:ss AM/PM) from excel, How are you reading the data from the Microsoft Excel spreadshe...

11 days ago | 0

Does Matlab automatically vectorize for loops?
In general we don't discuss what the JIT does internally as we don't want users to try to code against that always-moving target...

12 days ago | 2

Can't run script in namespace directory
You can run a script in a namespace. You need to use the name of the namespace as part of the command, just like you would when ...

12 days ago | 0

3d arrays Matrix multiplication with a vector
This wasn't an option when the question was asked originally, but since release R2020b you can use pagemtimes. Let's make a smal...

12 days ago | 0

Converting Unix Timestamp to Date Time
Use the 'ConvertFrom' option in your datetime call. This tells datetime how to interpret the value you pass into it. I think you...

12 days ago | 0

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Incosistency Precision Value (decimal double) When using strcmpi/contains
If you're trying to determine if one number is contained inside another array of numbers, converting them to strings then using ...

13 days ago | 1

Passing output from a ButtonDownFcn callback function
Callback functions for Handle Graphics objects don't return output arguments. [Where would it return those output arguments to? ...

13 days ago | 0

scope marker to line
The Scope block in a Simulink model will plot the data that is passed into it. If you want the block's plot to show the signal l...

13 days ago | 1

How to count the number of scatter points of each color
Rather than creating one scatter plot for each individual point, I'd use that loop to create a vector of data that indicates in ...

14 days ago | 1

is matlab automatically updating xlim and ylim?
If you want to prevent MATLAB from automatically updating the axes limits when you add new data to the axes, set the XLimMode, Y...

14 days ago | 0

intarpulation on a sin wall
Just based on the code you showed, the main suggestion I have is not to recreate the scatteredInterpolant object every time. Jus...

17 days ago | 0

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Unexpected prompt characters on command line output
Rather than piping the contents of the file to MATLAB, do you see this same behavior if you use the -batch startup option listed...

17 days ago | 1

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Does fread use cast when reading non-integer byte data
MATLAB doesn't have a 14-bit integer type. The closest larger type is the signed 16-bit integer type int16. From the fread docum...

18 days ago | 0

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is there way to convert this python code to matlab code? how can i convert python code to matlab? this is the code that I want to convert:
Do you need to convert the code or do you just need to run the code? If the latter, see this section of the documentation.

19 days ago | 0

Average Calculation and Array in For Loop
When i is equal to 1, attempting to index into m with i-1 (otherwise known as 0) as an index would error if the short-circuit &&...

19 days ago | 0

Still waiting for my order to be processed

20 days ago | 1