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Michael Van de Graaff


Last seen: 18 days ago Active since 2021

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Answered
Alternative to using Multi-level field struct
I gave it shot. n = 1000; s(n) = struct(); for ii = 1:n for jj = 1:n s(ii).a(jj) = ii;%this is just buildin...

1 month ago | 1

| accepted

Answered
Using fminsearch in the app designer
As written, data is a 1x2 array of EditField objects. You need to get the actual number values You may want to replace the edit...

1 month ago | 1

Question


Is fit() not supposed to be used? It seems intentionally terrible.
I have been trying to use fit() to fit my data, but it seems like the documentation and functionality of it are terrible. for e...

2 months ago | 1 answer | 0

1

answer

Answered
Errorbars on a select dataset
You haven't defined err, f, or g. Also, please post the FULL error message for better help this produces an errorbar plot: x ...

2 months ago | 0

Answered
Can someone help me with this. I try my 101% but i always fail with GUI.
the code you've provided (which you should put in youre question rather than your comment/answer, you can edit the question and ...

2 months ago | 0

Answered
Why is updating my uitable slowing down my app?
Remove styles from the table with removeStyle(table) https://www.mathworks.com/help/matlab/ref/matlab.ui.control.table.removest...

2 months ago | 0

| accepted

Question


Why is updating my uitable slowing down my app?
Why does my uitable get sluggish when i'm updating it? (Solved, posted for community reference) I have an app. The app has a ...

2 months ago | 1 answer | 0

1

answer

Question


Can the Code Profiler be used programmatically to profile an app in App Designer?
I am aware that I can open the Profiler, click 'start profiling' run my app, then stop profilling and view it. Can I initiate ...

3 months ago | 1 answer | 0

1

answer

Question


Are recursively defined or nested anonymous functions dangerous?
I'm writing a generic fitting app for myself. My data are 2D images of atomic density distributions. They have several features ...

3 months ago | 1 answer | 0

1

answer

Question


Extract sub array from d-dimensional array given indices for each dimension
Suppose I have a d-dimensional array A which is size d_1 by d_2 by....by d_d and for each dimension i have a index vector vd_i ...

3 months ago | 3 answers | 0

3

answers

Question


Setfield vs dot indexing for deeply nested struct
Supose i have the following struct and an associated string: s.f1.f2.f3.f4.f5 = data; tmp_string = 's.f1.f2.f3.f4.f5'; So, j...

4 months ago | 1 answer | 0

1

answer

Answered
Modify elements in arrays stored in cells at specified rows/columns
I modified X to make it a bit clearer where each element is going, but I believe this does what you want: X = { [1,0.1], [2,0.2...

5 months ago | 0

| accepted

Question


Applying whos to each field of a struct
I wrote a function to apply the whos function to a struct and all of its fields recurvsively, and I have a strong but inarticula...

5 months ago | 2 answers | 0

2

answers

Question


What is the difference between strjoin and join?
The Documentation says "The join function is recommended to join elements of a string array." Why is this?

5 months ago | 1 answer | 0

1

answer

Question


Possible to omit automatically generated/greyed out code in app designer from ctrl-F results?
When using the app designer, I often use ctrl-F to find text. Often, a large number of results from component creation, properti...

7 months ago | 1 answer | 0

1

answer

Answered
MATLAB app designer, how to update value of a property in declared callback function
I put the following in a comment, and OP says it worked, so i'm copying this into an answer in the hopes that it can be accepted...

7 months ago | 0

| accepted

Answered
Is it possible to process the sparse matrix faster with vectorization instead of for loop?
So you're not gonna have enough memory, so that's gonna be a big problem. (actually, my computer did 12000 points in about 3 se...

7 months ago | 0

Answered
Matlab App Designer does not respond after running for ~15min
You have an fopen but no fclose. that's generally not a great idea in my experience Is fopen even supposed to be used in this c...

7 months ago | 0

Answered
Less Than and Less Than or Equal to Not Working Properly
So, for the part of your question "Additionally, if anyone could explain why the table is starting at -.15 even though -.2 is th...

8 months ago | 0

| accepted

Answered
Attempting to plot a function with a for loop, but nothing is working.
figure(1); kilotons = 2; %i needed to add this % i always use double indices ii,jj,kk, helps avoid confusing and also is % i=...

8 months ago | 1

| accepted

Question


Delay automatic unfolding in App Designer due to syntax errors in function definition
I have built an image fitting app that I use for my work. The app has several private functions, which I occasionally edit. Fo...

9 months ago | 1 answer | 0

1

answer

Answered
MATLAB APP DESIGNER INPUT EDIT FIELD. PLEASE HELP!!
Does something like this do what you want? function ageoffirstpilotEditFieldValueChanged(app, event) goodage = 0; ...

1 year ago | 0

| accepted

Question


Why doesn't [] ~=1 yield logical one?
I'm using matlab r2012B, because the computer is old and disconnected from internet and it runs my experiment and is not to be u...

1 year ago | 1 answer | 0

1

answer

Answered
How to reverse a series of variable assignments?
I did find a quick solution. On the File Exchange Alessandro Masullo has a function which aligns a block of variable assignments...

1 year ago | 0

| accepted

Question


How to reverse a series of variable assignments?
In my code, I frequently have blocks of code of the form var1 = setting1; othervar2 = othersetting2; somevar3 = somesetting3;...

1 year ago | 2 answers | 0

2

answers

Question


App Designer add function confused by variable names
I've determined the problem and work around for my particular case, and wish to post it here for posterity. The problem i en...

1 year ago | 1 answer | 2

1

answer