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Ken Atwell


MathWorks

372 total contributions since 2011

Former product manager for MATLAB, but the company decided to trust me with the source code, so now I'm a developer.

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Answered
Tab completion of struct within cell
If you can try the just-released R2019a, MATLAB will now tab completion in this situation.

7 mois ago | 1

Answered
Run script while changing different paths
You did not specify the error you see, but I can see a problem with the cd command. It only take one argument, but you are passi...

8 mois ago | 0

Answered
How do I run MATLAB from the mac terminal?
I do this: open /Applications/MATLAB_R2018b.app/

9 mois ago | 2

| accepted

Answered
Why am I getting "Subscripted assignment dimension mismatch."
It looks like you're trying to create a 2D matrix of char(acter)s. For this to work, each char vector needs to be exactly the sa...

10 mois ago | 1

| accepted

Answered
What is the format to write to a file not in the MATLAB directory.
This is a great question. I don't have a flash drive handy to try this, but you might need to mount the flash drive to make it a...

10 mois ago | 0

| accepted

Answered
Matlab R2009b compatibiliity with Solaris 11
https://www.mathworks.com/content/dam/mathworks/mathworks-dot-com/support/sysreq/files/SystemRequirements-Release2009b_Solaris.p...

10 mois ago | 0

Answered
Why doesn't the callback I've written here seem to work? As far as I can tell all of my syntax is correct and I know that none of the pregenerated code has been altered. Thank's in advance!
The error message: Reference to non-existent field 'app'. is telling you that you are trying to access handles.app, that is, t...

11 mois ago | 1

| accepted

Answered
Plotting matrices that don't have the same size
When calling plot, the length of the x,y pairs must be equal. Here is an example of a plot of x^2 with noise added, then then a ...

11 mois ago | 0

Answered
Sir my program howing a error. how to rectify the error.
The variable 'H' is used but does not exist. I see that you are trying to assign to 'H' in a loop above this failure, and I'll g...

11 mois ago | 0

Answered
Error using chdir ; cannot CD to (Name is nonexistent or not a directory) / permissions error
Writing to the root of your file system is a bad idea. Looking at this code, TAUPVC_RUNME_Create_ROIs_For_Rousset takes a numbe...

11 mois ago | 0

| accepted

Answered
Particle tracking software error / "No appropriate method, property, or field 'addAll' for class 'msdanalyzer'."
The error message telling you that there is nothing called addAll in the class msdanalyzer. I don't know anything about this cla...

11 mois ago | 1

| accepted

Answered
Suggestion/question: User-friendly tab auto-completions
Give the Live Editor a try in a new-ish release of MATLAB; I expect its auto-completion will behave more like you are hoping for...

11 mois ago | 0

| accepted

Answered
Index exceeds array bounds error when trying to reach .tif images from file
Those backslashes are likely not really part of the folder name, but inserted by the Terminal program to escape spaces in the fo...

11 mois ago | 1

| accepted

Answered
R2018a functionSignatures.json (user function tab complete) not working as documented outside of live-script
See the "comments" section for more discussion. In this particular case, the use of the argument name "options" is making the d...

environ un an ago | 0

| accepted

Answered
How to configure tab completion for my function in MATLAB 2016 ?
Note that, as of R2018a, this capability is documented and supported. See <https://www.mathworks.com/help/matlab/matlab_prog/cus...

environ un an ago | 2

Solved


Matrix indexing with two vectors of indices
Given a matrix M and two index vectors a and b, return a row vector x where x(i) = M(a(i),b(i)).

presque 3 ans ago

Solved


Getting logical indexes
This is a basic MATLAB operation. It is for instructional purposes. --- Logical indexing works like this. thresh = 4...

presque 3 ans ago

Solved


Return elements unique to either input
Given two numeric inputs a and b, return a row vector that contains the numbers found in only a or only b, but not both. For ex...

presque 3 ans ago

Solved


Set the array elements whose value is 13 to 0
Input A either an array or a vector (which can be empty) Output B will be the same size as A . All elements of A equal to 13...

presque 3 ans ago

Solved


Replicate elements in vectors
Replicate each element of a row vector (with NaN) a constant number of times. Examples : n=2, A=[1 2 3] -> [1 1 2 2 3 3] n=0...

presque 3 ans ago

Solved


Find the largest value in the 3D matrix
Given a 3D matrix A, find the largest value. Example >> A = 1:9; >> A = reshape(A,[3 1 3]); >> islargest(A) a...

presque 3 ans ago

Solved


Check if number exists in vector
Return 1 if number _a_ exists in vector _b_ otherwise return 0. a = 3; b = [1,2,4]; Returns 0. a = 3; b = [1,...

presque 3 ans ago

Answered
Why can't I mex cpp with matlab?
MEX is working as expected. How old is this code? Xcode's compiler is alerting you to several risky programming patterns bei...

environ 3 ans ago | 1

Answered
Does anyone know how to run selection on mac?
Shift+F7. If you are on a lap, depending on your system preferences, you might need to add Fn to that chord (I do). As Jan sug...

plus de 3 ans ago | 3

Answered
Why did I get this error?
The function |deg2rag| was introduced in R2015b, according to the <http://www.mathworks.com/help/matlab/ref/deg2rad.html documen...

plus de 3 ans ago | 0

Answered
OS X 10.5.8 install
R2010b was the last release to support OS X 10.8: <http://www.mathworks.com/support/sysreq/release2010b/macintosh.html>

presque 4 ans ago | 0

Answered
multiple line edit is not allowed on MATLAB file editor window?
The MATLAB Editor does not have this, I think. Do you have an example MATLAB source file you can share with us where this kind ...

presque 4 ans ago | 0

Answered
Question on using a while loop?
To add the bet from the total, use: Bank = Bank + Bet; Subtraction will be similar, using "-" of course. To get your p...

presque 4 ans ago | 0

Answered
Does matlab become slow and unusable when working in a folder with many files?
When you cd into a folder with 50,000 file, bear in mind that *all of these files are visible from MATLAB path*, and therefore m...

presque 4 ans ago | 1

Answered
Can anyone help me with telling me how my variable is undefined?
You are writing a function that accepts 'temperature' as an input parameter. So, 'temperature' will exist inside your functions...

presque 4 ans ago | 0

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