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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. Since the IT clowns hosed the mail server config, I only check my email once every month or two. If you're sending me questions about the forum, you won't get an answer. If you're sending me questions about my own FEX submissions, feel free, but accept the likely delay. Alternatively, ask a question on the forum and @DGM me so I'll get notified.

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Answered
convert vector of character to number
Are the inputs always single characters? Are the inputs only A or B? Are the inputs always letters? Does case matter? Here's...

2 hours ago | 0

Answered
multi-dimensional array - summing the layers (combining)
To sum along a given dimension: dim3sum = sum(val,3);

6 hours ago | 0

Answered
showing warning in command window
Yes, as I mentioned, you need to rename that file or move it somewhere off the search path so that MATLAB doesn't try to use it....

6 hours ago | 0

Answered
Please explain the following line
Without any context, all anyone can give is an answer without context. min(inp(:)) % this is the global minimum of inp max(in...

7 hours ago | 0

Answered
i have an error in imshow
You likely have a user-created file called image.m somewhere on the path. You can try to see what is on the path by doing whic...

9 hours ago | 0

Answered
Fading/shading an image
A 'multiply' blend is one of the simple and fundamental kinds of image blending. If you have appropriate images to begin with a...

1 day ago | 0

Answered
delete an element from string
How do you intend to identify the thing you want to delete? Do you simply want to delete the second string in the array? str...

1 day ago | 1

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Answered
help on graph (w/o common matrix plotting built-in functions)
In the spirit of ridiculousness, here is my attempt: % random binary data data = randi([0 1],10,10) data = 1 1 ...

1 day ago | 0

Answered
how to convert rgb to hsi
MATLAB has no tools for HSI or HSL. There are tools on the File Exchange. The ones I use are here: https://www.mathworks.com/...

2 days ago | 0

Answered
How to find mean Hue and mean Saturation of an HSI image not HSV image?
MATLAB has no tools for HSI or HSL. There are tools on the File Exchange. The ones I use are here: https://www.mathworks.com/...

2 days ago | 0

Answered
Highlighting a Region of interest and getting the average Hue value ?
Taking the mean of hues is not as simple as described, and it's likely an unnecessary complication. H is a circular continuum. ...

2 days ago | 0

Answered
row that increases more every element
Here's my guess: A = randi([10 20], 1,10) B = cumsum(A) % cumulative sum of A

2 days ago | 0

Answered
extracting mean pixel value from an image
This might be a start, but bear in mind how fragile this will be if the colors change or the swatch becomes rotated or something...

3 days ago | 1

Answered
Masking multiple parts of image
As for creating a mask with multiple circular regions, you can use the ROI tools. You could do this interactively something l...

3 days ago | 0

Answered
How to change white on the outside to black?
Some of the objects are connected to the surrounding white blob. You'll need to deal with that. You might be able to do someth...

3 days ago | 0

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Answered
Can I convert shades of red (Pink, Red, Maroon) in this RGB image to one single color, lets say blue?
Greetings from the distant future. Since the question leaves some details unknown and OP likely no longer needs the answer, I'm...

3 days ago | 0

Answered
Invert even and odd columns in an image
Depends what you need. "Inverting even and odd column positions" might be interpreted a few different ways. By simply doing a ...

3 days ago | 1

| accepted

Answered
Apply Average Filter on Image with just next-before 5 columns
Consider the example: % a simple test image with a single white pixel in the center inpict = zeros(13); inpict(7,7) = 1; %...

4 days ago | 1

| accepted

Answered
How to remove the white background blobs touching the border of the image?
I don't know why you have a big white border on your image, or why your binarized image is uint8 RGB -- or why the apparent pixe...

4 days ago | 0

Answered
App Designer change colormap
I'm going to guess it's complaining about the missing handle on the gray2 line. If so, then do this: gray2 = flipud(gray(256))...

4 days ago | 0

| accepted

Answered
Editing Legend Items for hatchfill2
There are a couple examples in the answers here: https://www.mathworks.com/matlabcentral/answers/478956-getting-hatchfill-to-pr...

4 days ago | 0

Answered
legend line colors don't change
You need to give the line object handles to legend() to be sure it's picking the right objects. % THE APPLICATION: THIS IS NO...

4 days ago | 0

| accepted

Answered
Using imread and plot grayscale image
Tools like imshow(), image(), imagesc() will display single-channel (grayscale) images with the current colormap. In your case,...

4 days ago | 1

| accepted

Answered
what percentage of reduction in image size resulting from switching from the YCvCr colour space to RGB ?
If we're talking about "size" as in geometry (i.e. number of pixel elements), then if the YCbCr is not downsampled, then the ima...

5 days ago | 1

Answered
How do I remove the spaces between concatenated images. they are too wide but i want the image to appear as 1 after concatenation
Depending on what your needs are, you can use montage(), imtile(), or something else. Instead of trying to display images one a...

5 days ago | 0

Answered
How can I represent points and lines in 3 dimensions?
Either move the hold on statement after the first call to plot3(), or issue a view(3) command after plotting. Creating a pi...

6 days ago | 1

| accepted

Answered
How to scan matrix in spiral way?
There is a demo function that can generate NxN arrays in an outward spiral. That could be used (with some arithmetic and flips/...

6 days ago | 0

| accepted

Answered
can someone help me with dithering ? I'm trying to do random dithering, I want to do halftone and pattern too, but I'm stuck at random
I don't know what your setPixel() and getPixel() functions are, or why you're incrementing a counter variable that's apparently ...

7 days ago | 0

| accepted

Answered
hi ,I processed images on a folder. Now I want to save all the processed photos in the folder, but only the last photo is saved, what should I do?
Considering that there's missing code and open scopes, we're left to guess whether anything is inside of a loop or not. Either ...

7 days ago | 1

Answered
How can I overlap two images/pictures in Matlab?
There's an awful lot of traffic on this question. I don't know that passers-by actually have the same intent, but let's assume ...

7 days ago | 0

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