# Catalytic

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**Content Feed**

How to save .mat files on the disk after each iteration?

Often, you would put all images with the same label in the same folder - Folders={'Label1','Label2','Label3'}; for j=1:nu...

18 dagen ago | 1

Curve fitting a function that is dependent on a difference of 2d functions

There appears to be a simple analytical solution - constant=(0.0025)^(-5/3)*(2*Lambda^2*0.1816)/D^(1/3); DTV=(cX+cY)*consta...

ongeveer een maand ago | 0

Calling functions that have a variable name

That sounds like a bad idea. You should probably make a single function where (n,k) are one of the arguments - function oneFun...

ongeveer een maand ago | 3

Trapezoidal Rule of Convolution with Non-Uniform Intervals

I don't believe there is such a thing as the "Trapezoidal Rule of Convolution". Undoubtedly, you are thinking of the trapezoidal...

ongeveer 2 maanden ago | 0

| accepted

cut the object in space (separate a 3D object into two distinct parts) using a plane

The IsoCut command here looks like it will do this - https://www.mathworks.com/matlabcentral/fileexchange/87112-isocut

2 maanden ago | 0

How to trace the minimum and maximum lines of the image of the moiré franges?

Something like this might also work - A=load('Image').Image; T=findEdges(A,'top',10); B=findEdges(A,'bottom',10); C=fin...

2 maanden ago | 1

| accepted

Changing color in matlab

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

2 maanden ago | 0

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...

2 maanden ago | 0

| accepted

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...

3 maanden ago | 1

| accepted

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...

3 maanden ago | 2

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...

3 maanden ago | 0

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...

4 maanden ago | 2

| accepted

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...

4 maanden ago | 0

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,...

4 maanden ago | 1

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...

6 maanden ago | 0

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...

7 maanden ago | 0

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...

8 maanden ago | 0

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...

8 maanden ago | 0

Using the surf and meshgrid command

Use fimplicit3 instead fimplicit3(@(x,y,z) y - sin(x.* cos(z)) ,[-1,1] )

8 maanden ago | 0

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...

8 maanden ago | 2

| accepted

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...

8 maanden ago | 2

| accepted

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...

8 maanden ago | 1

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...

8 maanden ago | 1

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...

8 maanden ago | 2

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); ...

8 maanden ago | 1

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...

8 maanden ago | 0

Question

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...

9 maanden ago | 1 answer | 1

### 1

answerReplacing 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 ...

ongeveer een jaar ago | 0

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...

ongeveer een jaar ago | 0

| accepted

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);

ongeveer een jaar ago | 0

| accepted