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Catalytic


56 total contributions since 2019

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Answered
optimization problem with two variable maxima and minima
fun=@(x) [2*x(1)^2+23.08*x(2)^2+4*(6+x(1))^2+24+14*(x(1)^2 +x(2)^2)^0.5+3*(x(1)^2+x(2)^2)-Y;... prod(x)-1]; x=fsol...

7 jours ago | 0

Answered
matrix multiplication for "3-D" matrices
If you have the parallel computing toolbox, you can do this on the GPU with pagefun(@mtimes,A,B) but this may only provide gai...

10 jours ago | 0

Answered
how to have function with scalar value
"I have a code and 2 objective functions" If you really do want to treat this as a multi-objective problem, you should probably...

10 jours ago | 0

Answered
Build new matrix from look up table
C=CD( interp1(B,1:numel(B),A,'nearest') );

10 jours ago | 1

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Answered
how to calculate area, perimeter and circularity of objects in an image using regionprops
Notice - >> a=1; %not displayed >> b=2, %displayed b = 2

11 jours ago | 0

Answered
calculate std and mean for multiple variables automated
Observe - >> input=rand(10,5) input = 0.8147 0.1576 0.6557 0.7060 0.4387 0.9058 0.9706 0.0357...

11 jours ago | 1

Answered
Accessing table variables in a class method
Here is an example to demonstrate that accessing tables by variable name works fine with value classes. Subclassing from 'handle...

18 jours ago | 1

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Answered
How to curve fit an equation with sigma function
C = polyfit( sqrt( x.^2+y.^2) , Z, N)

environ 2 mois ago | 1

Answered
How can i determine the area in percentage of a clustered image?
Divide the membership of each cluster by the total number of pixels.

environ 2 mois ago | 0

Answered
Dimension of arrays being concatenated are not consistent.
Some things you urgently need to learn: https://www.mathworks.com/help/matlab/ref/dbstop.html https://www.mathworks.com/help/m...

environ 2 mois ago | 1

Answered
Plotting points in style [x1,y1] , [x2,y2], [x3,y3] and them plot all of them?
No, but you can certainly write your own wrapper for any of the plotting functions to give you the input syntax that you want.

environ 2 mois ago | 0

Answered
Index exceeds array bounds
The only solution: https://www.mathworks.com/help/matlab/matlab_prog/debugging-process-and-features.html#responsive_offcanvas

environ 2 mois ago | 0

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Answered
hi every one, i need to ask a question, thank you
A=double(A); A(logical(A))=B;

3 mois ago | 0

Question


Can symbolic vectors (not vectors of symbols) be defined and manipulated in the Symbolic Math Toolbox?
I would like to define symbolic functions that are functions of vector-valued quantities, like syms A x f(x)=x.'*A*x where A ...

3 mois ago | 1 answer | 0

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answer

Answered
Why does skeletonization sometimes reduce horizontal rectangles to single pixels?
Remember what bwskel is doing. It is peeling the outer pixels of the rectangles like an onion over and over again until it reach...

3 mois ago | 0

Answered
Translation for an ellipsoid ?
Is there anyway to do this such that later on I need the coordinates of the rotated followed by translated ellipsoid. You can d...

3 mois ago | 0

Question


Nested Functions versus Global Variables
Why are nested functions better for sharing variables between workspaces than global variables? There doesn't seem to be much di...

3 mois ago | 1 answer | 0

1

answer

Answered
scatteredInterpolant in nonlinear system
In the first global declaration, etac is missing from the list. global Hm pe1 pe2 pe3 etae2 etae3 qmax1 qmax2 qmax3 %<--- add...

3 mois ago | 0

Answered
Why does fplot think my function is not vectorized
Here's a workaround to trick fplot into doing the right thing.

3 mois ago | 1

Answered
Correspondence between intrinsic axes and world axes for imref objects
Or is it j,i, and k like with meshgrid? It is this one, sad to say. You can check it like this M=50; N=40; P=30; ir = imref...

3 mois ago | 0

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Answered
put number in cell
B=~cellfun('isempty',A)*0.2

4 mois ago | 0

Answered
How to read images with positive integer? No imead()
I definitely don't get all zeros with imread. Problem solved? >> nnz(imread('C0039_100122_INDS.png')) ans = 4624 ...

5 mois ago | 0

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Answered
FFT, IFFT and phase shifting
Is this what you want Xf=fftshift(fft(y)); f=fs.*((0:N-1) -ceil((N-1)/2))/N; subplot(2,1,2) stem(f,abs(Xf)/length(y)); ti...

5 mois ago | 0

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Answered
Branching points problem in binary image
[I,J]= find( bwmorph(BW,'branchpoints') );

5 mois ago | 0

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Answered
How do I replace missing data with other values?
isnan is the correct way to detect and replace nans. Rn=radi; Rn(isnan(radi))= ---- something else ----

5 mois ago | 0

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Answered
How can I register or rotate series of image in matlab
imregister or imregtform seems like a good choice.

5 mois ago | 0

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Answered
parallel computation for a for loop
parfor pi=1:NP*kkk Tempo1 = zeros( p(pi) ,1 ); Tempo1_M = zeros( p(pi) ,1); Tempo2 = zeros(q(pi) ...

5 mois ago | 0

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Answered
How to Hybrid two median filters
out = medfilt2(medfilt2(yourImage))

5 mois ago | 1

Answered
fitting a funciton with minimax error
Consider using fminimax.

6 mois ago | 1

Answered
Error using trainNetwork. Unable to read file.
I think it is expecting more traditional types of image files like .jpg,.png, etc.. I think for .mat you need to specify a speci...

6 mois ago | 0

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