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
extract the intersection of two matrices
I have a feeling that the range of data in B isn't what you think it is. Using the compositing method involving -1 is probably ...
ein Tag ago | 0
| accepted
Unable to display cropped image in the image axes properly
I'm not sure if you realize that you're starting an interactive imcrop() session. imshow(imcrop(M),'parent',handles.axes2); ...
ein Tag ago | 0
| accepted
How to construct a "ones" matrix with zero blocks in the diagonal
This display is going to get cut off, but this should serve as an example. A = ones(4); B = 1 - blkdiag(A,A,A,A)
ein Tag ago | 0
circle problem, circumscribed to another circle and the area, area per image detection
This could be improved or elaborated, but it's a simple start: % let's assume that 1px = 1 square meter r = 400; C = rand(10,...
2 Tage ago | 0
| accepted
How to combine and rgb and a thermal image?
Let's just start with concatenation. We have two test images: an RGB visible image and a single-channel thermal image. How I m...
2 Tage ago | 0
| accepted
Chang a color in an image to black
Improving selectivity of the orange mask is really only half the battle; you'd need to also restrict the red mask to keep them ...
4 Tage ago | 0
| accepted
Error: Unable to perform assignment because the size of the left side is 1-by-1 and the size of the right side is 1-by-41.
It's unclear what your intentions are. If I assume you're trying to do this all elementwise WRT h, then you missed an index: p...
4 Tage ago | 0
How to display multiple ROI (masks) in different colors on one image?
I know this is probably too late to help, but consider this: fontSize = 16; Image = imread('Report_Picture.png'); [rows, colu...
5 Tage ago | 0
Help correcting the sequence function
% if you're asking the user for a number, use a clear description % "sequence matrix" doesn't tell anyone what the number mea...
5 Tage ago | 0
Contourf colorbar color range
If you want a discrete colormap with nonuniformly-spaced breakpoints, you're going to have to make one. You're probably using a...
5 Tage ago | 0
This the main file for hill cipher
uhh okay? f = 1; But if you really want my advice, asking the user to input a bunch of things one element at a time using in...
6 Tage ago | 0
Question
How to find one's own comments on File Exchange
I recall being able to see a list of my own comments and comments i've received on my FEX submissions. Given that FEX comments ...
6 Tage ago | 0 answers | 0
0
answersUnable to draw just the boundary of an image
Well, you're loading a grayscale image subject to destructive compression as a jpg file. At no point do you explicitly threshol...
6 Tage ago | 0
| accepted
Improve the speed of nested for loops through vectorization or similar methods
One big speed improvement you can do is to move the scalar multiplication of Dz outside the loop, but if you don't use a loop, i...
7 Tage ago | 1
| accepted
Solving for different thetas in an equation.
If you have a sufficient amount of information to describe the number of variables, then yes. If I make some assumptions: % as...
7 Tage ago | 0
Cell components perpendicular division
Something like: A = num2cell(reshape(1:16,[4 4])) % example array B = cellfun(@rdivide,A,circshift(A,[-1 -1])) % output To de...
7 Tage ago | 2
| accepted
How do I find the phase of any point in the graph below
Considering that there's only one boundary of interest, it's fairly simple. x=0:10:91; y=0.01*x.^2; xt=[30 70]; yt=[60 2...
7 Tage ago | 0
| accepted
contourf without isoline but with label
Set linecolor to 'flat' [C,h] = contourf(peaks(20),10); set(h,'LineColor','flat') clabel(C,h,'FontWeight','bold','FontSize',5...
8 Tage ago | 2
| accepted
Question
Inconsistent interpretation of tabs in the forum post editor
To preface, I don't even know if this problem can be replicated by others. Across various Firefox-based browsers, the post edit...
10 Tage ago | 0 answers | 1
0
answersI need to add a colorbar to an indexed image showing by imshow()
It seems to me that what you're trying to do is just scale the tick labels and not actually scale the mapping (which is what you...
10 Tage ago | 0
| accepted
how to send pcolor contour to back when updating contour z value?
If you have the handle of the object which represents the lines, you should be able to reorder the stack: uistack(lineplothandl...
10 Tage ago | 0
| accepted
How can I add text to an image and make the text become part of the image within MATLAB?
Doing display capture seems like a poor workaround. The suggested method will fail for any practically large images. A reduced...
10 Tage ago | 0
How do I multiples of a number in an array
Depends how far you want to go with it. You could leverage implicit array expansion to do it in a way that might make a more ge...
10 Tage ago | 0
| accepted
Change a specific color in an image to another one
Bear with me. My connection is worse than normal, and the scripts on this site simply break below about 300 kbps. I can't affo...
11 Tage ago | 0
| accepted
Superimpose Image 1 onto bottom right of Image 2
disp() is a function that takes only one argument, yet you're feeding it indices like it's an array. The assignment will try to...
11 Tage ago | 0
| accepted
is there are a way to take the result of this figure with out input data ?
I've posted similar answers before, and each time I have to point out that the quality of any extracted information will be ques...
14 Tage ago | 1
How do I plot a function with a variable that has multiple values?
v = [0 0.5 1]; c = [1 1 1]*0.5; subplot(2,1,1) plot(v,c,'x-') subplot(2,1,2) plot(c,v,'x-')
14 Tage ago | 0
Switch skipping over cases in new loop
That's not how switch-case statements work. The case is only entered when the switch expression (pp is numeric) is equal to the...
14 Tage ago | 1
Calculate distances from region props centroid data to edge of binary shape
Depends on how your objects are shaped, but this should be a start: inpict = rgb2gray(imread('blobs.png'))>32; S = regionpro...
14 Tage ago | 0
How to find the index of any maximum matrix?
s = [10 10]; x = randi(100,s) [~,idx] = max(x(:)) % this gets the linear index [row col] = ind2sub(s,idx) % if you want subs...
15 Tage ago | 0
| accepted
