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Catalytic


Last seen: 1 día hace |  Con actividad desde 2019

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Respondida
Changing color in matlab
A = imread('xyz_converted.png'); [R,G,B] = imsplit(A); B=cat(3,G, 0*R,0*B); imshow(B)

1 día hace | 0

Respondida
Speed up process of passing each row of large array to external function
This reduces it to one loop, which should work with parfor - x = lambdas; % 1 x 1927 element vector intt=int'; logg=nan...

3 días hace | 0

| aceptada

Respondida
Using datastore for a matrix
If you're not going to store your data in memory, then the training samples have to be split up into separate .mat files. You co...

21 días hace | 1

| aceptada

Respondida
fmincon with handle function input
No, the objective function that you give to fmincon can contain anything, but fmincon's algorithms will assume that the input-to...

21 días hace | 2

Respondida
Why is it necessary/useful to have a HandleCompatible attribute?
Maybe because in some cases you may want a class to have copy-by-reference semantics but you want its subclasses to have regular...

23 días hace | 0

Respondida
How to prove that a destructor must be defined for the Value classes
I think there is an argument to be made for allowing destructors to be defined by value classes, but not for memory management p...

alrededor de 2 meses hace | 2

| aceptada

Respondida
Indexing a struct inside a struct
If Stint is a struct array, as you say, then it should be indexed with parentheses (), not braces {}, dataA.Stint(jj) Convers...

alrededor de 2 meses hace | 0

Respondida
In the framework FEX, How do I change the projection of 3d points in a different 2D plane (currently it is in XY and want to change it to YX)
Since this concerns an FEX submission, you should probably ask the question in the discussion page of that submission. However,...

2 meses hace | 1

Respondida
How to adjust plots with several subplots with different loops?
ord={x,z,w}; for i=1:3 subplot(1,3,i); h=plot(ord{i},y,'LineWidth',4); [h.Color]=deal('cyan','red','blue...

4 meses hace | 0

Respondida
Calculate multivariable equation with Matlab
You need some sort of model for the line slopes and intercepts as a function of the amperage. There are infinitely many that can...

5 meses hace | 0

Respondida
find the index number using bsxfun command
bsxfun has been deprecated since R2016b. Just use implicit expansion. A = [12 13 15 1]; B = [1 2 12 15 10 13 11 14 3 4 5 6 7 8...

6 meses hace | 0

Respondida
How do I change only one variable in an equation and plot the response for this equation on a graph for all of the different values of this one variable?
F=1;K=1; DR = [0, 0.2, 0.4, 0.6, 0.8]; r=linspace(0,5)'; A = (F/K) ./ sqrt(((1 - (r.^2)).^2) + (4.*DR.^2.*r.^2)); plot...

6 meses hace | 0

Respondida
Using the surf and meshgrid command
Use fimplicit3 instead fimplicit3(@(x,y,z) y - sin(x.* cos(z)) ,[-1,1] )

6 meses hace | 0

Respondida
Display outputs of lsqnonlin in APP designer
Use the OutputFcn option to obtain the values used to populate the iterative display. Then print those values whenever and howev...

6 meses hace | 2

| aceptada

Respondida
Anyone know what is wrong with my T2* calculations?
The problem with try...catch is that if you have any coding errors in the try block, it will never get executed. Here, you are u...

6 meses hace | 2

| aceptada

Respondida
insert singelton dimension for broadcasting
Inserting dimensions seems like as much a pain as reshape, but if you must do it that way, here's an approach closer to the Pyth...

6 meses hace | 1

Respondida
How to find the angle of a line with respect to plot window
For context, I am trying to use this angle to produce some text that has the same angle as the line There are File Exchange pos...

6 meses hace | 1

Respondida
Is there an option to overwrite the old release when installing a new one?
No, there is not. You should always manually uninstall any versions you don't want. It is probably a good thing that they make y...

6 meses hace | 2

Respondida
insert singelton dimension for broadcasting
You could also create your own specialized function that does it - [M,N,P,K]=deal(2,3,4,5); A=rand(M,N,P); B=rand(M,N,K); ...

6 meses hace | 1

Respondida
insert singelton dimension for broadcasting
You didn't complete your description of why reshape() is "a bit annoying". If you're going to be doing the same operation repea...

6 meses hace | 0

Pregunta


Behavior with unspecified output arguments
I am a bit puzzled by the behavior I see in the below example. I thought Matlab will always check that a function call assigns a...

7 meses hace | 1 respuesta | 1

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Respondida
Replacing old version graphshortestpath with new shortestpath function
I tried replacing graphshortestpath() with shortestpath() and matlab still says the function is undefined. A strange thing to ...

10 meses hace | 0

Respondida
How can I implement this equation in matlab?
All of the summations can be pre-computed using matrix multiplication, e.g. - The results of the...

10 meses hace | 0

| aceptada

Respondida
Hi! How to fix plane position as a 0 degree angle for Phi azimuth angle or how Matlab understand where Phi angle should be drawn?
A = 3.67 * sin(Phi0) * cos(Theta0); B = 3.67 * sin(Phi0) * sin(Theta0); C = 3.67 * cos(Phi0);

10 meses hace | 0

| aceptada

Respondida
How would this be solved
Remember that the vector derivative of a parametric curve is tangent to the curve - syms r(theta) r(theta)=[2+3*cos(2*theta)...

10 meses hace | 0

Respondida
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 2
You cannot do this - x=[1,2,3], x(1)=[5,6] %left side 1x1. right side 1x2

10 meses hace | 0

| aceptada

Respondida
how to plot 100x100 data set
X=rand(100); Y=rand(100); scatter(X,Y);

10 meses hace | 0

Respondida
mask a matrix based on values in two arrays
A=accumarray([u,v],1,[100,100]); k=ones(2*padu,2*padv); mask=conv2(A,k,'same');

10 meses hace | 0

Respondida
how can i change the value of a variable with a slider in matlab designer?
Here is a doc page talking about the general process of writing component callbacks in appdesigner. In this particular section, ...

alrededor de 1 año hace | 0

Respondida
Minimise memory requirements when importing many images
Why is it better to use NaNs instead of zeros? A value of 0 doesn't conflict with anything because all of your nontrivial values...

alrededor de 1 año hace | 0

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