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DGM


Last seen: Today Active 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
How to detect percentage of a color range inside an Image?
Something like this: A = imread('coloredChips.png'); % i just grabbed a picture that had some greens imshow(A) minvalue =...

ungefär 6 timmar ago | 0

Answered
Mean filter with kernel size
This is a routine uni project. There are a lot of existing examples on the forum. Assuming the filter kernel is rectangular ...

ungefär 6 timmar ago | 0

Answered
Highest value number in a repeating array of ascending numbers
If those simple rules can be depended upon, then A = [1;2;3;1;2;3;4;5;1;2;3;4;5;6;1;2]; seqpeaks = A(circshift(A==1,-1))

ungefär 7 timmar ago | 2

| accepted

Answered
To save an image using imwrite
You'll need to decide whether you want to scale the data. Toward that end, you'll probably need to decide whether these images ...

ungefär 11 timmar ago | 1

Answered
"Index in position 2 is invalid. Array indices must be positive integers or logical values" when performing a for loop
MATLAB uses 1-based indexing, so UI(j,0) isn't a valid index. You can just use 1 for the first column. The loop isn't really...

ungefär 11 timmar ago | 0

Answered
Plot from a result obtained in local functions
Just get the vector returned by each of the local functions when you call them. Then you can plot them. Pmax_1 = max_press1(W1...

ungefär 13 timmar ago | 0

Answered
Plot has wrong x-values
The values are not wrong. There are just few values, so the lines connecting the points make the appearance of nonzero data whe...

ungefär 14 timmar ago | 0

Answered
Cell Array Reshape Operation
There are probably other ways, but... % a patterned test array A = repmat({(1:16).', (17:32).'; (33:48).', (49:64).'},5,5) ...

en dag ago | 1

| accepted

Answered
corners of rectangle by center point
You mean basic addition and subtraction? c = [-9.9366 1.6890 1.3800]; w = [0 1.7 0.3]; v = c + w/2.*[0 -1 -1; 0 1 -1; 0 1 1...

en dag ago | 0

| accepted

Answered
Why does this algorithm yield an 'incorrect' result?
This is a consequence of accumulating the small errors inherent to floating-point representations of numbers. A = 0.2; S = 0; ...

en dag ago | 1

| accepted

Answered
Elementwise indexing of a vector by a multidimentional array
I have no idea what's ideal for gpuArray, but this is how it would be done with linear indexing. T = 11:20; % a vector A = ran...

en dag ago | 0

Answered
How do I change the color distribution in contourf?
This probably isn't exactly what you want, but I think that an inpainting+marker approach would be visually misleading. In this...

en dag ago | 0

Answered
Height of a figure spontaneously changes.
It's seems like the figure properties aren't updated immediately. You're reading the properties before they're ready and then t...

3 dagar ago | 1

| accepted

Answered
bin2gary: Conversion to char from logical is not possible
The output of dec2bin() is a character array. If you want to do logical operations on it, you have to convert it first. x = ...

4 dagar ago | 1

Answered
I have 2d images in JPEG format created by matlab program and I want to convert them into .STL files using matlab code
Well, here's a half-baked answer, but anyone is free to do better. I just grabbed this mesh tool from the FEX and gutted it to ...

4 dagar ago | 1

| accepted

Answered
find out char in cell array
If all you're trying to do is get a logical indicator of which char arrays in a cell array start with a particular character, yo...

5 dagar ago | 0

Answered
how can i use my function directly on a array without having x and y?
You don't need to specify x and y when calling imagesc(). If you handle the input arguments like this: A = imread('cameraman...

6 dagar ago | 1

| accepted

Answered
Match real X, Y, Z, positions with calculated positions
This is a generalized example of finding and evaluating distances. I'm assuming here that simple euclidean distance is an appro...

7 dagar ago | 0

| accepted

Answered
How do i change color in a 3d animated plot over time?
Use hold and only draw one segment at a time. Note that for N points, there are N-1 segments, hence the length of the color tab...

7 dagar ago | 0

| accepted

Answered
1-bit TIFF images having more than 1 channel are not supported.
This is happening because img is of class 'logical'. You expand img to MxNx3 (img3). When writing the TIFF, if the BitsPerSamp...

7 dagar ago | 0

| accepted

Answered
Animated GIF contains offset in consecutive timestamps
To be more precise, the file does not contain any frame offsets. All the frames are positioned at [1 1]. The problem is that t...

7 dagar ago | 0

Answered
How write binary image pixel values to a text file such that each row contains only one pixel value of 8bit?
I'm no wizard with fprintf(), but this is one way to deal with it. I_in=imread('peppers.png'); B = cellstr(dec2bin(I_in,8));...

8 dagar ago | 0

| accepted

Answered
average image intensity problem
You're converting the images to floating point using double(). Use im2double(). Tools like imshow() or imwrite() expect data...

9 dagar ago | 0

| accepted

Answered
How can I show the scale of my arrow in a quiver plot?
Oof. This is one of the many reasons I don't like dealing with quiver plots. There are a few tools on the File Exchange that m...

9 dagar ago | 0

| accepted

Answered
how to add grid to imagesc?
It depends how you want to visualize the data. Tools like imshow() or imagesc() represent the data points at the center of each...

9 dagar ago | 0

| accepted

Answered
Adding a response text to a color detection code and another color to detect.
In order to be able to say that a color is (e.g.) "aquamarine" or "turquoise" or some particular name, you need to define explic...

9 dagar ago | 0

| accepted

Answered
what is horzcat error.
It means that one or both of Zs or Zm are nonscalar. This works with scalars Zs = 3; Zm = 1; Z= [(Zs-Zm) -(Zs-Zm) 0; ...

10 dagar ago | 0

| accepted

Answered
Function definition are not supported in this context. Functions can only be created as local or nested functions in code files
In versions which support local functions in scripts (R2021x does), the functions must be at the end of the file. There aren't ...

10 dagar ago | 0

| accepted

Answered
coins.png how to find the smallest coin in a image and display it alone in a separate window?
Something like this: A = imread('coins.png'); m = bwareaopen(A>80,100); % get areas, sort, get bounding box C = regionprop...

10 dagar ago | 0

| accepted

Answered
Show multiple axes all around image?
For a single axes, you can only have one set of tick labels per axis. The workaround is the creation of an empty axes to provid...

10 dagar ago | 0

| accepted

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