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DGM


Last seen: Today
204 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.

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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 ...

3 hours 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 hours 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...

5 hours 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...

19 hours 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...

20 hours 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'...

2 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...

2 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 ...

2 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...

2 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...

2 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...

2 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 ...

2 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...

3 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,...

3 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...

3 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/...

3 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 ...

3 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 ...

3 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...

3 days ago | 1

| accepted

Answered
Error Message: Array indices must be positive integers or logical values.
I'm not really sure what you're trying to do with the calculations, but this line: F(2*n:1+2*n) =+ Force(0); is going to resul...

3 days ago | 0

Answered
Combine Two .tiff Files into One Image
I'm not familiar with the registration and transformation tools, and I have a feeling that part of the problem is the fact that ...

3 days ago | 1

| accepted

Answered
Cody Problem 25. Remove any row in which a NaN appears
Okay. Consider that isnan(A) returns a logical array, and that any() can work along a specified direction. B = A(~any(isnan(...

4 days ago | 1

| accepted

Answered
Warning: Integer operands are required for colon operator when used as index.
You need integers to do indexing operations. plot(f,Ak(1:floor((length(V2)+1)/2))); grid on

4 days ago | 0

Answered
Too many arguments error problem
Your function definition function Input_File(filename) specifies that this function takes one input argument and has zero out...

4 days ago | 1

| accepted

Answered
Extracting Satellite streaks.
Here's my attempt: inpict = imread('sat.jpg'); bwpict = im2bw(inpict); bwpict = bwpropfilt(bwpict,'eccentricity',[0.95 1]); ...

4 days ago | 0

| accepted

Answered
how to change the e+00 format
As far as anything that handles numeric data is concerned, 7.8651e+04 and 78651 are the same. The formatting is merely a matter...

4 days ago | 1

| accepted

Answered
plot to the function
If you're using a relatively new version, this should work. Avoid loops where possible. In this case, you don't need any. r =...

4 days ago | 0

Answered
Generate same array as what imwrite produces from a double array
I can answer that question, but I don't know that you mean to be doing the thing you're trying to do. Most IPT tools assume t...

4 days ago | 0

| accepted

Answered
Different Function Input Formats
For the case where looking for a specific string: varargin = {'aaa','bbb',13,{'a','b'},[12 34],'ccc'} % let's pretend we have s...

4 days ago | 1

| accepted

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