DGM
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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Content Feed
Graphing time vs velocity
This is a starting point: % some test parameters a1 = 1; % Train acceleration (m/s^2) a2 = 1; % Train decceleration (m/s^2) ...
ongeveer 2 uur ago | 0
Cross section or profile at an angle from [X, Y Data]
Consider: % generate test points in a 3-col format as described [xx yy zz] = peaks(100); rmask = (xx.^2 + yy.^2) <= 2.5^2; X...
ongeveer 3 uur ago | 0
How to save the required output?
Something like this: %Select image folder A A_dir = uigetdir(); %Select image folder B B_dir = uigetdir(); %Identify file...
2 dagen ago | 1
| accepted
Unable to convert grayscale images into rgb from a folder.
imwrite() needs numeric/logical data as its primary input. You're feeding it a 3D char array of file paths. Read the file, con...
2 dagen ago | 0
| accepted
Running a forloop to add text in the black pixels only!
Consider: Str = fileread('adapthisteq.m'); % using this in place of a custom text file x = im2uint8(imread('circles.png')); %...
2 dagen ago | 0
Construct a 5 x 10 array that contains zeros. Assign elements at (row, column) (3,5), (2,4) and (1, 9) values of 44. Display the matrix.
Consider an altered example: In a 3x5 array, assign a fixed value to elements (3,3), (2,5), and (1,1) sz = [3 5]; % array size...
7 dagen ago | 0
Techniques for blending images that have overlap
This is a simple approach to doing edge-interpolation. This could also be done using interpolation tools in fewer lines, but ri...
8 dagen ago | 0
| accepted
No data points appear on the graph when I hit run
When you plot points one at a time, they are rendered as single unconnected points. Since there is no specified marker type, th...
9 dagen ago | 0
Changing the limit of for loop give different result
Without knowing where fim comes from, I don't know. I'm going to guess that fim is another image imported the same way as the g...
10 dagen ago | 0
Never ending while-loop
There are a few problems. LW(1) will never match variabel, since they're different lengths. The first 3 characters of LW will ...
12 dagen ago | 0
| accepted
I am trying to use the "findpeaks" function to find the peak in a set of data.
The documentation for findpeaks explains it better than I could: "The prominence of a peak measures how much the peak stands ou...
12 dagen ago | 0
why my matlab didn't plot anything?
Start with something like this: m = 85; g = 9.81; ti0 = 0; tf1 = 9; v0 = -20; h = 1; c1 = 11; dv1 = @(g,c1,v,m) g-c1*v/m...
12 dagen ago | 1
New matrix with only the negative numbers of another one
A = [-1 ; -2 ; 6 ; -4 ; 5 ; 10; -22; 4]; B = A(A<0)
12 dagen ago | 0
| accepted
How to update title of plot without it "wiggling"
The issue isn't with getting the right number of characters. It's an issue of character spacing. plot(rand(1,10),rand(1,10))...
13 dagen ago | 0
Find equal pentagonal and square number
This is a rather brute force method, but it still only takes 1.5ms to find the third match on my dumpster PC. n = 1:10000; p...
13 dagen ago | 2
Audio to Image Conversion
What are n and m? Is either greater than 65500? Should it be? I don't know if using factor() this way is really doing what y...
14 dagen ago | 0
| accepted
Rescale 8-bit grayscale image
Here's a start: inpict = imread('cameraman.tif'); inrange = [64 126; 127 230]; outrange = [0 120; 151 255]; % you sure you ...
14 dagen ago | 1
Create a surface from several 1D plots
Something like this: % so you have a vector for x x = linspace(0,1,10); % and a bunch of vectors for z z1 = x.^1; z2 = x.^2...
15 dagen ago | 0
| accepted
Applying a circular mask to an image
There are other posts about how to composite two images (or an image and a flat BG) https://www.mathworks.com/matlabcentral/ans...
16 dagen ago | 0
| accepted
Given a matrix of n rows and 2 columns containing the xOy coordinates of n points. Find two points with distance and return the row index of those two points
Consider: n = 10; % number of points d = 7; % distance to match P = 10*rand(n,2); % example point list D = sqrt((P(:,1)-...
16 dagen ago | 0
Why didn't I find the same answer?
b and B are not the same. They are conjugate. B=-(-1)^(alpha-1)*(1/s^2)^(alpha); In this case (alpha-1) does not equal 0.7. ...
17 dagen ago | 0
| accepted
Index in position 2 exceeds array bounds (must not exceed 1) ?
Nothing in this code guarantees that the size of b and c are identical to the size of a. If they aren't the same size, you will...
17 dagen ago | 0
How to fix "error using class. Not enough input arguments"?
You had probably shadowed the function class() with some variable by the same name -- which is something you should avoid. wh...
17 dagen ago | 0
How do I insert a variable value in legend of a plot?
There are a bunch of examples around. The sidebar shows some. Here are some others: https://www.mathworks.com/matlabcentral/a...
17 dagen ago | 0
How to apply Gaussian filter with for loop without imnoise?
Replicating the gaussian noise functionality of imnoise() does not require any loops. If someone insists that you need to use l...
18 dagen ago | 0
| accepted
how to do Image translation
blef. A = im2double(imread('cameraman.tif')); s = imsize(A,3); % nonstandard; see attached file B = zeros([s 4]); for f = ...
21 dagen ago | 0
Plot multiple rectangles from set of points
Is this what you mean? C = [1 1; 2 4; 3 2]; % center locations [x y] for c = 1:size(C,1) r = 0.5+rand(1,2)*0.5; pl...
23 dagen ago | 0
| accepted
How to remove contour line in filled contour plot?
Hmm. I didn't think about that. I don't know that it can be done with contourf(). % make a simple linear ramp that cycles [x...
23 dagen ago | 0
| accepted
for loop/periodic implementation for number or arrays?
If I'm reading this right... Let's say you have an array A: A = randi([-5 110],5,3) % random test array allowedrange = [1 1...
23 dagen ago | 1
Using bag of words function
If you just want the word frequency table: filename = 'SampleText.txt'; str = fileread(filename); words = regexp(lower(str),'...
23 dagen ago | 0
