Community Profile # Chris

Last seen: Today Actif depuis 2018

You know how you can sort of see a flashlight through your hand? Red and near-IR photons scatter throughout the tissue and are infrequently absorbed. I study how to use that effect to measure tissue health. Pic not really related.

Programming Languages:
Python, C, MATLAB

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Simple query: how can I remove radial axes (eliminate the "spokes") on a Compass Plot
I think the developers of these functions don't intend for us to be messing with the grids, or haven't gotten around to making i...

environ 23 heures il y a | 0

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I'm having a problem averaging multiple curves using interp1
You take the mean and max of the U values; I believe you want the I values instead. You have plenty of data points, so the defa...

11 jours il y a | 0

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Logical Indexing With LinSpace Issues
This looks like a problem of computer precision. Double-precision floating point numbers in matlab (and floating-point numbers i...

15 jours il y a | 1

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What is the difference between "any" and "all" function?
B = [0 0 0]; [any(B), all(B)] C = [1 1 1]; [any(C), all(C)] A = [0 1 0]; [any(A), all(A)] If any elements are true, any is...

29 jours il y a | 1

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Unable to install matlab as it shows error unable to launch matlabWindow application
I would recommend using a Supported OS, probably with Gnome or KDE. If you insist on torturing yourself, start by reading the M...

environ un mois il y a | 1

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I would like to modify the equation to calculate total reflection coefficient for N multilayer structure
You could start with an approach like this (numbers are made up): ep = [1 3.9 12 1].'; % The apostrophe transposes the array t...

environ un mois il y a | 0

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set range in plot interactively
Attached is a basic app made hastily in App Designer. There are UI elements including a UIAxes for plotting, and callbacks att...

environ un mois il y a | 0

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Unable to perform assignment because the left and right sides have a different number of elements.
You've hit the end of the file. The file has 10001 data-containing lines. Your code errors at ii==11, jj==2. block_size (1000...

environ un mois il y a | 2

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Starting the AddOn Manager from the command line
I've just run across the Matlab Package Manager, though I'm not sure it would be helpful for your case either. MPM

environ un mois il y a | 0

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how to rotate image using function notation
If you're using imwarp, you might as well use imrotate, no? You'd be using the function imrotate() to rotate an image, if that's...

environ un mois il y a | 2

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How do I input a table column of values into a formula?
The problem, as pointed out by Stephen, is that you are accessing the table data with parantheses, which creates another table. ...

environ 2 mois il y a | 0

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Question regarding how to make a game similar to snake in MATLAB.
You could introduce a "grow" bit for each snake. Set it to false initially. grow = false; If a snake collides with an apple, s...

environ 2 mois il y a | 0

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Calling matlab.engine.connect_matlab() twice freezes Python
names = matlab.engine.find_matlab() if 'MY_SESSION' in names: eng = matlab.engine.connect_matlab('MY_SESSION') You can de...

environ 2 mois il y a | 0

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Converting an array slicer to Python
Here's a demonstration. import numpy as np lo = -200 hi = 20 x = np.ones((27000,1)) udata = np.ones((27000,10)) columnMa...

environ 2 mois il y a | 0

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How to merge and slice arrays of different sizes?
Perhaps you'd be better off with a cell array. ydata = randi(9,1,8) ydata = num2cell(ydata) udata = num2cell(randi(9,1,8)) u...

environ 2 mois il y a | 0

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disp(‘hello world’);
disp ('hello world'); Your apostrophes are wrong. How did you generate them? Here is your version: disp (‘hello world’); You ...

environ 2 mois il y a | 0

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expand intervals vol.2
Similar to problem <http://www.mathworks.co.uk/matlabcentral/cody/problems/2528 2528>. This is a more general case, when bounds ...

environ 2 mois il y a

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expand intervals
You're given a row vector of an even number of monotonically increasing integers. Each pair of consecutive integers is the lower...

environ 2 mois il y a

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Length of a short side
Calculate the length of the short side, a, of a right-angled triangle with hypotenuse of length c, and other short side of lengt...

environ 2 mois il y a

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Doubling elements in a vector
Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] then B = [ 1 1 5 ...

environ 2 mois il y a

Question

I'd like to plot some points over an image in a dialog.
I want to be able to select one point with a left-click, a second point with a right-click, but I'm running into all sorts of tr...

environ 2 mois il y a | 1 réponse | 0

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Matlab App Designer get axes name from button click
I would add a tag (under "Identifiers") to the UIAxes. Then: function UIAxesSelectedCallback(app, event) selectedA...

environ 2 mois il y a | 0

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How to do this temporal plot
Here's one way. For importing data, perhaps something like data=transpose(readmatrix('filename.xlsx',Range','A2:N2002')); Empt...

2 mois il y a | 0

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How do I create a property in a class that is a direct handle to another class object
@Captain Karnage like so? mydef = myDefinition; a = myDefinedObject([],mydef,[]); whos mydef a a.type a.type()

2 mois il y a | 0

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How to put name axes in 3D surf graph
Same way you would with a 2D plot. xlabel('Gy') ylabel('mm') zlabel('mm')

2 mois il y a | 0

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I want to do a knob for salt and pepper noise but the value of the noise dose not change
function UIAxesButtonDown(app, event) % The default button style doesn't have a value. % chang...

2 mois il y a | 0

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Question

Is there exist() functionality for packages/namespaces?
https://www.mathworks.com/help/matlab/matlab_oop/scoping-classes-with-packages.html Create a package and put it somewhere in Ma...

3 mois il y a | 1 réponse | 0

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Need help with car suspension dampening, current code is exp growing.
Looking at the image, a_w and a_c are independent of previous acceleration values. Aw(end+1) = -(1/Mw)*((Cw+Cs)*Zw(end) + Cs*Zc...

4 mois il y a | 0

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Generating PDF and Overplotting from Subset of Data Using Gaussian Mixture Model
I believe the area under the curve of these PDFs is 1. One way to work around that (though probably not the most correct way) w...

4 mois il y a | 0

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Something unexpected occured when I installed the Bioinformatics toolbox
https://www.mathworks.com/support/contact_us.html Click "Create Service Request" and follow the instructions.

4 mois il y a | 0