DGM

Last seen: Today

215 total contributions since 2015

Hi, I'm nobody.
I don't belong here, but I have nothing better to do.
Matlab used to be part of my work.
Now it's part of my hobbies.
That's pretty sad, really.

Contact

DGM's Badges

View details...

Answered
figure view direction issue
The problem you're having is improper correspondence between your axes. I think you're presuming that the loop is a known good ...

8 hours ago | 1

| accepted

Answered
How to save each column in E drive of computer?
Consider the simple example: A=rand(500,10); % placeholder data for f=1:size(A,2) outname=sprintf('output_%06d.mat',f); % ...

1 day ago | 0

| accepted

Answered
how can I Compute the value of d for the following values of x , Outcome equation d=((34.63/x)-5.126)/2.54
I have no idea what that code is intended to do, but if you just want to evaluate the expression all x: x=[0.1000,0.1500,0.2000...

1 day ago | 1

Answered
Strange behavior of if statement
It's correct. The sum isn't 1. It's approximately 1. d = [0.4 0.1 0.1 0.1 0.1 0.1 0.1]; % leading zeros for readability, pls ...

1 day ago | 0

Answered
Gaussian filters returned by fspecial() with asymmetric size parameter
I suppose I can't answer the motivation/utility question, but I can say that imgaussfilt() uses gaussian kernels that accept vec...

1 day ago | 0

| accepted

Answered
Three-dimensional lower triangular Matrix
Not sure if this is what you're asking, but: A = randi(89,10,10,2)+10; % test array mask = tril(ones(size(A,1),size(A,2))); % ...

2 days ago | 0

| accepted

Answered
Can someone suggest the best way to plot a directional 2D equilateral triangle?
This is incomplete, but it should be a start. r=10; % triangle radius p0=[0 0]; % prior point [x,y] p=[50 50]; % current po...

2 days ago | 0

Answered
I am wondering if this a no output no input function. If it is not what type of function is it?
It certainly doesn't have any input or output arguments, but reading the file with imread() is redundant if using that syntax wi...

2 days ago | 0

Answered
Remove specific values from array
Something like this: A = [9,1,2,5,1,2,5,1,1,5,2,3,1,2,5,1,2,5,4,1,2,5,10] % input x = [1,2,5,9,10]; % values to keep B = A(is...

3 days ago | 0

| accepted

Answered
How to make multiple execution of a code by loop ?
Well, since I don't know what the error message was, then I'll just guess it was this. T=readtable('Outputresults.txt') A=T(...

3 days ago | 0

Answered
How to isolate object from a background of variable brightness
There are probably more robust methods, but here is my attempt: image=imread('worm.bmp'); im0 = imbinarize(255-rgb2gray(imag...

3 days ago | 2

| accepted

Answered
Calculating double integrals over a rectangular region without using built in function.
Your code looks like it should work. The problem is in your assumptions. The double integral over the given area calculates a ...

4 days ago | 0

Question

Can the figure toolbar be enabled for docked figures post-R2012b?
Prior to R2012b, docked figures had the regular figure toolbar, just like undocked figure windows. In later versions, there's j...

4 days ago | 0 answers | 0

0

answers

Answered
How to create a vector in Matlab
For the first part: x=1:1/216:500; for the second part, what exactly do you need the spaces for? The extra spaces don't actua...

4 days ago | 0

Answered
Index exceeds the number of array elements (8).
Your loop condition is while i <= length(Q) and the last thing that happens in the loop is i = i+1; so the moment the loop e...

4 days ago | 1

Answered
how to get activation key of matlab r2015a
Have you tried this? https://www.mathworks.com/matlabcentral/answers/102845-where-can-i-find-the-activation-key-or-file-install...

4 days ago | 0

Answered
legend problem when plotting netcdf data
It's usually better to give legend the handles associated with the plots: h1=plot(x,thing1,'b'); hold on; h2=plot(x,thing2,'r'...

5 days ago | 0

Answered
why my plot is not correct?
I'm not sure what you intend the correct number to be. You're doing the cube root of negative numbers. They're going to be com...

5 days ago | 0

Answered
How can I take the value from an equation and plug it back into the same equation? (Newton-Raphson)
Something like this: function D = down(A, B, C, D, maxiter, tol) % things that are in the argument list don't get rewritten ...

6 days ago | 0

| accepted

Answered
input window in matlab
The dialog is the least of the problems. In general: rep = uigetdir; Imgs = dir(rep); thisname = Imgs(3).name; [path,name,e...

6 days ago | 0

| accepted

Answered
Adding feasible region on a Contour plot
Like I mentioned, it depends how you want to represent the region. Let's say you want to represent the feasibility region withi...

6 days ago | 0

| accepted

Answered
How can I fill the scratch after scratch detection?
Without knowing the original image content, you can probably do inpainting with regionfill() https://www.mathworks.com/help/ima...

6 days ago | 0

| accepted

Answered
divide a matrix into small matrices
Something like this: A=randi(89,9)+10 % make an example array B=mat2cell(A,[3 3 3],[3 3 3]) % split the array into 9 arrays ...

6 days ago | 0

| accepted

Answered
Dialog boxes to calculate functions
You'll get a numeric output from the menu call. Just do a switch-case structure, and calculate the answer using the correspondi...

6 days ago | 0

Answered
how to convert sawtooth signal to a ramp signal
I imagine what you want is unwrap: t = linspace(0,3*2*pi,1000); raw = atan2(sin(t),cos(t)); unwrapped = unwrap(raw); plot(t,...

6 days ago | 0

| accepted

Answered
newton raphson on matlab
I don't know why anyone would make you use x0=0 unless they wanted you to lose your hair. Think about where you are on the curv...

6 days ago | 0

Answered
colormap including gray for out of range
You should be able to use colormapeditor to edit the current cmap or any of the presets. https://www.mathworks.com/help/matlab/...

6 days ago | 0

Answered
what chroma subsampling does imwrite use for a jpg file, 4:4:4, 4:2:2, or something else?
I know this is an old question, but I just had to figure it out myself; I'm inclined to put answers where they belong. Imwrite ...

6 days ago | 0

Answered
What chroma subsampling rate (e.g., 4:2:0 or 4:2:2) does imwrite use when saving a JPEG image?
I know this is an old question, but I just had to figure it out myself. Imwrite uses 4:2:0 chroma subsampling, and the default ...

6 days ago | 0

Answered
How to Separate the RGB channels from an image and get the average of each RGB channel separetly
I'm feeling particularly lazy today, so I'm not going out of my way to make this solution avoid nonstandard tools. They could b...

6 days ago | 1

| accepted