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Steven Lord

MathWorks

Last seen: Today Active since 2002

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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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Answered
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...

ungefär 12 timmar ago | 0

Answered
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()...

ungefär 13 timmar ago | 2

Answered
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...

en dag ago | 0

Answered
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...

en dag ago | 0

Answered
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...

en dag ago | 1

Answered
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...

en dag ago | 0

Answered
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...

2 dagar ago | 2

Answered
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 ...

2 dagar ago | 0

Answered
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...

2 dagar ago | 0

Answered
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...

3 dagar ago | 0

| accepted

Answered
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 ...

3 dagar ago | 1

Answered
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? ...

3 dagar ago | 0

Answered
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...

3 dagar ago | 1

Answered
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 ...

4 dagar ago | 1

Answered
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...

4 dagar ago | 0

Answered
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...

7 dagar ago | 0

| accepted

Answered
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...

7 dagar ago | 1

| accepted

Answered
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...

8 dagar ago | 0

| accepted

Answered
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.

9 dagar ago | 0

Answered
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 &&...

10 dagar ago | 0

Answered
Still waiting for my order to be processed
Please contact Customer Service directly using this link and ask about the status of your order.

10 dagar ago | 1

Answered
Flipping Sign provide wrong information and Answers
How exactly does this reordering "change the meaning of the equation"? The derivative of with respect to is . In this case, x ...

10 dagar ago | 2

| accepted

Answered
Find Number of Elements in an Array
Yet another way to do this: A = ['KM'; 'KL'; 'MN'; 'KM'; 'MM'; 'KL']; [counts, values] = histcounts(categorical(cellstr(A)))

10 dagar ago | 0

Answered
How can I verify an isomorphism relation between two graphs that join cube and octahedron vertices?
Build the two graph objects then call either isisomorphic or isomorphism on it. G_1 = graph([1 2 3 3 3 4 4 4 5 5 5 6...

10 dagar ago | 0

Answered
With the new ODE command (matlab 2024a), I'd like to parametrize the ICs and make, for example, x0=[p(1); p(5)] and then compute SENSITIVITIES!
If I understand what you're asking, I think you could just modify the Examine Parameter Sensitivity example on the ode documenta...

11 dagar ago | 0

| accepted

Answered
Opening a Figure from a Function - Not enough input arguments
This line of code: flowmeasurementfigure.Callback = {@flow_measurement,halfscreensizecentre,figurecolour} % ERROR ON THIS L...

11 dagar ago | 0

Answered
Discrepancy in functions between MATLAB versions
What does the following command show when run in each of the versions of MATLAB? which -all fit My guess is that you have Curv...

11 dagar ago | 0

| accepted

Answered
How to insert dash-line in a matlab figure?
You could use the yline function or you could set the axes properties YGrid and GridLineStyle. x = 1:10; y = x.^2; ax = axes;...

12 dagar ago | 0

Answered
missing "configure for app" in matlab 2019b app designer
According to the documentation page for appdesigner.customcomponent.configureMetadata this function was introduced in release R2...

12 dagar ago | 0

| accepted

Answered
I'd like to do various things, including controlling the dimensions of the plot box. What I do here with xlim, ylim, and zlim doens't work.
Instead of manually modifying the coordinates, I'd consider using the hgtransform function in conjunction with makehgtform.

14 dagar ago | 0

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