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Steven Lord


MathWorks

3.281 total contributions since 2002

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
How to combine two histograms
Combine them as in show them in the same axes with the same bins, combine them as in add the bin counts together, or something e...

ongeveer 11 uur ago | 0

Answered
Section headers are formatting as comments: how to get SH working again?
You have an error in your code near the end of the file. You're missing the loop variable. for 1:totalNumberOfFiles Because of...

1 dag ago | 1

| accepted

Answered
How to extract tweets given an ID
Looking at the definition of the getdata method for twitter objects I suspect you want to either specify a number for the 'id' q...

1 dag ago | 0

Answered
Directory Issue - not finding subfolder
Since you're using release R2016b, you can use the functionality added to dir in that release to recursively search through fold...

1 dag ago | 1

Answered
How to replace outliers with NaN
You can use grouptransform with an anonymous function that calls filloutliers. Let's use your sample data. group = repelem(['A'...

1 dag ago | 1

Answered
Tracking instantiation when running an OOP program
In order to do this, I will need a good understanding of how the code runs. Is there a simple way of tracking the order of inst...

2 dagen ago | 0

Answered
How can I increase the resolution of Contourf plot?
contourf(Z)%this will give the contourf with increased x,y axis! That's correct. What does contourf use as X and Y coordinates...

2 dagen ago | 0

Answered
Resample multiple overlapping datetime to 1-minute (and 15-minutes) resolution?
Let's start off with two simple timetable arrays, one per pump. pump1 = timetable(datetime(["01-Jan-2018 00:14:09"; "01-Jan-201...

2 dagen ago | 0

Answered
Wrong function interpretation on App Designer
You've encountered one of the problem listed in the Limitation section of the MATLAB Compiler documentation. You wrote: whe...

3 dagen ago | 0

Answered
I am trying to run (e.g. from examples) fanimator.I gets :Undefined function or variable 'fanimator'. Also, typing "help fanimator", repling "fanimator not found." Any helps?Thanks
According to the note at the end of its documentation page this function was introduced to Symbolic Math Toolbox in release R201...

3 dagen ago | 0

Answered
Help with finding highs
Do you want to find a local maximum? If so see the islocalmax function. Do you want to find a place where your data changes sig...

3 dagen ago | 0

Answered
Users can't change the number of days to borrow a license
Are you using release R2018a? If so see Bug Report 1789116.

4 dagen ago | 0

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Answered
Compare values in a matrix and keep the lowest number in each element?
Call min with the two matrices as input. From the documentation: "C = min(A,B) returns an array with the smallest elements taken...

4 dagen ago | 1

Answered
Why did I type the following example in MATLAB, MATLAB shows an error.What's the reason?
That is a MuPAD function, not a MATLAB function. You can call it in a MuPAD Notebook or in a symengine object, but you cannot ca...

5 dagen ago | 0

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Answered
Can multiple classes share external methods without inheritance?
There are a number of problems with your data_class1 class. classdef data_class1 < handle %?? - not a subclass, right? pr...

7 dagen ago | 0

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Answered
How to plot multiple Contours in a 'parent' Figure.
I suspect you have a variable named set (or maybe one named axes) in your workspace that's taking precedence over the built-in s...

7 dagen ago | 0

Answered
Using trainNetwork on a remote headless machine
I haven't tried this but I think you want to use trainingOptions to tell MATLAB not to create the training progress Plots. If yo...

7 dagen ago | 0

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Answered
Matlab freeze during intitializing...
That answer is missing a step 7: contact Technical Support using the telephone icon in the upper-right corner of this page and w...

8 dagen ago | 0

Answered
Undefined function or variable 'denoisingNetwork'.
According to its documentation page denoisingNetwork was introduced in release R2017b. To use this you will need to upgrade to r...

8 dagen ago | 0

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Answered
'num2str' Error
Since you're using release R2019a, rather than using char array concatenation or sprintf I would append strings together. stude...

8 dagen ago | 0

Answered
Network visualization distance between nodes
If you're using release R2018a or later, specify the 'WeightEffect' name-value pair when you plot or layout your graph or digrap...

9 dagen ago | 0

Answered
Matlab to C code conversion issue
function final_seq=myapp(x,y,a,b,i,j,z,k,p,m,new,xt,J,ix,X1,final_seq) x=input(' Enter fast clock ratio '); %fast clock y=inpu...

9 dagen ago | 2

Answered
Finding the repeated substrings
For the original question you could convert the char data into a categorical array and call histcounts. >> C = categorical({'AA...

9 dagen ago | 0

Answered
"Find and Replace" in Matlab Editor
I don't believe there is such functionaltiy in the Editor, but this seems like a reasonable enhancement request to file with Tec...

9 dagen ago | 0

Answered
[Guide] Pass a variable between two functions using handles.
Each callback function has its own workspace, separate from the rest. Creating a variable in one doesn't automatically create it...

9 dagen ago | 0

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Answered
Is it possible to optimize converting a C# array of serial times (double) to a Matlab array of datetimes?
datetime can convert an array of serial date numbers at once, and this avoids the overhead of calling datetime repeatedly. >> D...

10 dagen ago | 1

| accepted

Answered
Licenses for multiple users
I recommend contacting Installation Technical Support using the telephone icon in the upper-right corner of this page. That will...

10 dagen ago | 0

Answered
Please help me with the error : "Parse error at numargin: usage might be invalid MATLAB syntax"
Smart indent your code and you should see that you have an extra end. The end on line 45 ends the for loop "for i=1:length(gui_S...

10 dagen ago | 1

| accepted

Answered
is there any command to Perform hexadecimal division operation between the data in two variables
Assuming by "hexadecimal division operation" you mean regular division, use hex2dec then divide as normal. If you have a differ...

10 dagen ago | 0

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Answered
how to show selection of property using 'Tab' in self-developed function
If you're using release R2018a or later, yes.

11 dagen ago | 0

| accepted

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