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DGM


Last seen: Today 2015 以来アクティブ

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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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) ...

約3時間 前 | 1

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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...

約9時間 前 | 0

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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; ...

約12時間 前 | 1

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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...

約17時間 前 | 0

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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...

約17時間 前 | 0

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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...

1日 前 | 1

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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 = ...

3日 前 | 1

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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 ...

3日 前 | 1

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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...

4日 前 | 0

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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...

5日 前 | 1

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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...

6日 前 | 0

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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...

6日 前 | 0

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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...

6日 前 | 0

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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...

6日 前 | 0

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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));...

7日 前 | 0

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

8日 前 | 0

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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...

8日 前 | 0

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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...

8日 前 | 0

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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...

8日 前 | 0

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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; ...

9日 前 | 0

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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 ...

9日 前 | 0

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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...

9日 前 | 0

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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...

9日 前 | 0

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How do I plot a toroid in MATLAB?
MATLAB may not have a built-in function, but that doesn't mean there aren't any functions out there that can conveniently do the...

10日 前 | 0

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how can I creat a circle in 2 dim and 3 dim?
You can always try this: https://www.mathworks.com/matlabcentral/fileexchange/58413-plot-superquadratic-surfaces These are con...

10日 前 | 0

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How to change opacity of an image
There are many ways to approach it, but if logical masking suffices, simple indexing works: fg = imread('image.png'); % foregro...

11日 前 | 0

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How to find maximum amplitude of a vibration plot?
Something like % example data x = linspace(0,2*pi,100); y = sin(x); [maxy idx] = max(y); % find maximal y-value maxx = x(...

11日 前 | 0

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How can I remove the background fro the image and display roi for the shape of the image left ?
This probably isn't what you want, but it's probably a component of what you want. To do image processing operations with a si...

12日 前 | 0

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How to compare two non-integer value together?
Your example arrays are identical, and I don't really know which one you're trying to compare to which. Consider the example us...

12日 前 | 0

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How to solve error with Index exceeds the number of array elements (1). Error in line 35
You're trying to access pN2(n), pNH3(n), etc, for n>1. These parameters are scalars. for n=1:1:Numdata %Process Tf(...

13日 前 | 0

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