Steven Lord

MathWorks

Last seen: Today|2002 以来アクティブ

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.

Statistics

All

バッジを表示

Content Feed

回答済み
Why the result in curve fitting tool shows a different graph in plot?
The values that are displayed are not the same as the values that are stored in the object. The displayed values only show four ...

約1時間前 | 0

回答済み
What is the difference between backward slash vs forward slash in MATLAB?
A=[4,12;6,8]; b=[6,12;14,8]; From the documentation for mrdivide, /, if x = A/b then x*b should be close to A. x1 = A/b chec...

約5時間前 | 2

回答済み
retime different variable for different methods
Looking at the documentation page for the retime function, the description of the method input argument states that it must be "...

約5時間前 | 0

回答済み
How do I solve Check for incorrect argument data type or missing argument in call to function 'exp' MATLAB
The command sym fi does not create a symbolic variable named fi in the workspace. You can see this by asking what variables ar...

約6時間前 | 1

回答済み
What are "dimension names"?
Let me guess, you're trying to rename the Time of a timetable. dt = datetime('today') + days(1:4).'; t = array2timetable(magic...

約9時間前 | 0

|採用済み

回答済み
Want to weight Histogram entries by value
data = [ 23 2 12 2 85 3 38 3 12 4 09 2 97 4 ]; [V, G] = groupsum...

1日前 | 0

回答済み
PARFOR is 10X Slower than FOR
Have you tried using the parallel profiler to determine what percentage of the time taken by the parfor code is spent on the act...

3日前 | 0

回答済み
How to number vertices in a delaunay triangulation in a plot
Let's make a sample delaunayTriangulation and plot it. x = rand(20,1); y = rand(20,1); dt = delaunayTriangulation(x,y); trip...

4日前 | 0

|採用済み

回答済み
Methods to create arrays of NaN
You can check that the outputs of those two approaches are equal. The isequal function will return false since it does not consi...

4日前 | 0

回答済み
Selecting a random number with some probability
Another approach is to use the discretize function to discretize a uniform random number between 0 and 1 as generated by the ran...

4日前 | 0

回答済み
Use table row as input for a new table
Let's make two sample tables. T1 = array2table(1:3); T2 = array2table(4:6); Create a third table to hold the data from the fi...

4日前 | 0

回答済み
Solve the system of nonlinear equations (with symbolic variables) with the command fsolve
fsolve is intended to solve a system of equations numerically. Since your system of equations involves symbolic variables you wi...

4日前 | 0

回答済み
how can i create "x" empty vectors to begin refill it?
Can you dynamically create variables with numbered names like x1, x2, x3, etc.? Yes. Should you do this? The general consensus ...

4日前 | 0

|採用済み

回答済み
How do I get cd to work properly?
The cd function doesn't accept wildcards. You could use dir (which does) and iterate through the list of directories in its outp...

4日前 | 1

|採用済み

回答済み
Is there a function that tells me the elapsed time as the elapsed time continues to run?
t = tic; for k = 1:5 pause(1) fprintf("The time since the initial tic() is %g seconds.\n", toc(t)) end From the toc...

4日前 | 0

回答済み
Elementwise calculations when making a new Table column
It's not clear to me where the data in your limits variable is coming from, but if you want to use the minimum and maximum value...

4日前 | 1

回答済み
How to make an inherited immutable super class property mutable in the sub-class?
Just off the top of my head and based on the minimal information about your design, based on the fact that you said the subclass...

5日前 | 0

回答済み
Fillmissing function with movmean
Operations involving NaN as one of the operands is one common way to get a NaN in the output, but it is not the only way. See Wi...

6日前 | 0

回答済み
function filterAllow* not recognized
There are two filterAllowOnly functions in Vehicle Network Toolbox. The first filterAllowOnly function requires two inputs, the...

6日前 | 0

|採用済み

回答済み
how can I get the basic program behind a MATLAB GUI?
My first step would probably be to ask the person from whom you obtained the GUI if there is a programmatic API to the function ...

6日前 | 1

回答済み
Is there a way in MATLAB to guess the values of a matrix just like in the EES software?
I'm not 100% certain but based on my understanding of your description I think the fillmissing function may be of interest to yo...

6日前 | 0

回答済み
Visualy change values of legend
x = [1:288]; y = rand(288,1); plot(x,y); xlabel('time in 5 min') ylabel('random numbers') title('24/5 over a day') tickL...

6日前 | 0

回答済み
For loop to make an array from workspace variables
Can you dynamically create variables with numbered names like x1, x2, x3, etc.? Yes. Should you do this? The general consensus ...

7日前 | 2

回答済み
MBS Symbolic Toolbox Alternative
What operations do you need to do on these functions? If all you need to do is define and evaluate them, just define them as ano...

7日前 | 1

|採用済み

回答済み
MATLAB function 'nearest' does not work.
I find two functions named nearest in MathWorks products when I search the documentation. One is the nearest method for graph a...

7日前 | 1

回答済み
Simple neural network computation NOT working
Do you have any pre- or post-processing steps?

7日前 | 0

回答済み
Matlab online error while rendering plots
My suspicion is that you've written your own flip.m or flipud.m that's preventing MATLAB from calling the flip or flipud functio...

8日前 | 1

回答済み
Display what mldivide function (or A\b) does
There is a flowchart in the mldivide, \ documentation page that describes at a high level what it does to solve a system. But i...

10日前 | 0

回答済み
How can I find all possible pairs within a range that result in the same average?
As long as your arrays aren't that large just brute force it: array= 0:1:100; desiredAverage = 2; ind = find(array+array.' ==...

10日前 | 1

回答済み
Install MatLab on a computer with a 64-bit operating system, ARM-based processor
That machine does not satisfy the system requirements. Depending on your license and what you're trying to do, MATLAB Online ma...

11日前 | 0

もっと読み込む