DGM

Last seen: Today

199 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
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'...

7 hours ago | 0

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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...

8 hours ago | 0

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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, E, maxiter, tol) % things that are in the argument list don't get rewritt...

13 hours ago | 0

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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...

14 hours ago | 0

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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...

15 hours ago | 0

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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...

16 hours ago | 0

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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 ...

16 hours ago | 0

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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...

1 day ago | 0

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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,...

1 day ago | 0

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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...

1 day 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/...

1 day ago | 0

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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 ...

1 day 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 ...

1 day 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...

1 day ago | 1

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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...

1 day 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 ...

1 day ago | 1

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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(...

2 days ago | 1

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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

2 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...

2 days ago | 1

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

2 days ago | 0

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Answered
I am trying to get predefined dialog boxes to calculate arcsine of an argument I will put in a dialogue list. Bu what I do not understand is how I will get the answer arcsine(arg) to be written out in a message box, msbox. Someone who can help? The c
Try something like this: Y = asin(str2num(A{:})) msgbox(sprintf('The arcsine of %s is %s',A{:},mat2str(Y,5))) And this way al...

2 days ago | 0

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...

2 days ago | 1

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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 =...

2 days ago | 0

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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...

2 days ago | 0

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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...

2 days ago | 1

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Answered
Create binary matrix with some conditions (Matlab)
Well, I'm not exactly the guy to ask for elegant solutions to anything, but I'll take a stab at it. clc H=[1 1 1 1 1 1 0 0 0 0...

2 days ago | 0

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Answered
Color objects with areas larger than a set value
I'm not familiar with the video IO tools, but isolating/coloring the large objects should be easy enough I = imread('dots.jpg')...

3 days ago | 0

Answered
Please Help.. How can I display a certain value in my plot?
A simple way would be to use the legend itself, something like this: x=linspace(0,2*pi,100); y=sin(x); xmark=pi/4; clf pl...

3 days ago | 0

Answered
Obtain cross section from a plot
The answer is going to vary depending on how complicated you actually need to make it. If all you really need is going to be an...

3 days ago | 0

Answered
How to find the first element in ascending numbers that repeat?
You said you want the first instance where the next number is larger, but the desired output you gave [1 12 22] is all instances...

3 days ago | 0

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