# Catalytic

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**Content Feed**

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 ...

4 days 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...

4 days 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);

4 days ago | 0

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)...

14 days ago | 0

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

14 days ago | 0

| accepted

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');

14 days ago | 0

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, ...

3 months ago | 0

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...

5 months ago | 0

How to code binary Fibonacci sequence?

"where the successive elements of the sequence are obtained as the concatenation of the two previous ones" No, see - https://e...

5 months ago | 0

| accepted

Question

A*1 and A+0 could be faster.

Regardless of the size of a matrix A, operations A*1 and A+0 should be very fast. A simple pre-check would detect if one of thes...

5 months ago | 1 answer | 1

### 1

answerHow to call a function with vector input in the fit type function?

SCR has to be a 1D function of the independent variable nu, meaning it has to give valid output when nu is a scalar. That is not...

6 months ago | 1

What is the recommended way to pass long list of parameters between main workspace and function?

Do not use load/save to introduce undeclared variables in your workspace. This can have unexpected effects as described in this ...

6 months ago | 0

Converting a system of coordinates

You cannot do a 3D coordinate conversion from a single 2D camera measurement. You need at least 2 cameras. If you have 2 cameras...

7 months ago | 0

How to find the index of the first absolute minimum entry of a matrix

A=[5,7,0.5,5 ; 2,1,4,1 ; 1,6,7,0.5], [value,index]=min(A(:)) [Iindex,Jindex]=ind2sub(size(A),index)

7 months ago | 0

| accepted

How to take double integral of a function matrix?

syms x y a=1; b=1; t=1; E=100/72; v=0.2; x1=0; x2=b; x3=b; x4=0; y1=0; y2=0; y3=a; y4=a; B1 = [y-y4;0;x-x2]; B2 = [0;x-x2;...

7 months ago | 0

define nonlcon in fmincon

function [c, ceq] = mycon(x) ceq=[]; c(1) = -nonlinearfunction1 % Compute nonlinear inequalities at x. c(2) c(3) ...

7 months ago | 0

| accepted

multi array vectorization problem (reformulated)

% init A = [ -0.8013 -0.4981; -0.2278 -0.9009]; t = 0:0.01:1e2; tic; % eigen space [V,D]=eig(A,'vector'); D = resh...

7 months ago | 1

Question

Since when has it been possible to dot-index the output of a class method?

Since when has it been possible to directly dot-index the output of a class method call, like this - classdef myClass p...

7 months ago | 1 answer | 1

### 1

answerHow to formulate the following matrices?

Why not just - T=zeros(3,3,n); for i=1:n T(:,:,i) = [cos(theta(i)) -sin(theta(i)) x(i) sin(th...

7 months ago | 3

Finding close-to-linear solution

Using fsolve inside of fsolve is a doubtful-sounding thing to do. Why not just combine the equations from solveE with the equati...

7 months ago | 1

Input multiple arrays into function

Simpler example, L2 = [0 1/2 1/3 0 0 0 0; 1/3 0 0 0 1/2 0 0; 1/3 1/2 0 1 0 0 0; 1/3 0 1/3 0 1/2 0 0; ...

7 months ago | 0

| accepted

Problem with ploting exp function

If I had to guess, you have x and y reversed. [X, Y] = ndgrid(x, y); surf(X, Y, t(X,Y));

7 months ago | 1

Multiple fminbnd errors with a parametrized function

Here is a symbolic method, if that's what you wanted. syms t f(t) f(t) = exp(cos(t)) - sin((3^(1/2)*sin(t))/3); vpasolve(di...

8 months ago | 0

how to read multiple column data from excel sheet as a particular variables and use them as input other formula calculations in multiple itrations

Look at readmatrix(), readvars(), readtable(), etc...

8 months ago | 0

Condensing code cannnot figure out easier function to use

threshold=30; %don't call this "max" blocklen=300; difference=rand(1,9268); N=numel(difference); Nc=ceil(N/blocklen)*blo...

8 months ago | 0

Question

How do I enable a user to link his Matlab license?

I have recently become a Matlab license administrator for my organization. I have a user who is trying to link his license to hi...

9 months ago | 0 answers | 1

### 0

answersHow can I set max & min value but maintain the curve trend?

yourSignal = rescale(yourSignal)

10 months ago | 0

| accepted

Bidirectional property and method definition with classes

If updatevalues is false, update properties normally (no links with other properties) <-- this means I cannot use the Dependent ...

10 months ago | 0

Plot line with points at given distance

This may help, https://www.mathworks.com/matlabcentral/fileexchange/34874-interparc

10 months ago | 1