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David Hill


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4.068 total contributions since 2017

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Answered
How to split .mat file data into different variables?
a=readmatrix('yourData'); m=reshape(a,1024,[]);%why not just keep in a matrix that you can index into?

alrededor de 20 horas ago | 0

| accepted

Answered
How to apply a colormap to rgb image ?
I=imread('Capture3.PNG'); I_gray= im2gray(I); imshow(I_gray); colormap('jet');

alrededor de 21 horas ago | 1

Answered
Remove corresponding values in two arrays
A = [9,1,5,2,3,2] ; B = [12,23,41,4,10,6]; x = [1,2,5,9,]; % values to keep in A new_A = A(ismember(A,x)); new_B = B(ismemb...

alrededor de 21 horas ago | 0

| accepted

Answered
Code with function file not working
No reason for global variables. Problem is equation P=X*(1+r/100)^t;%need X*

alrededor de 21 horas ago | 1

Answered
Symbolic expressions inside of array
syms x y f = x^2; g = y^3; a = [f,g]; subs(a,x,3);

alrededor de 23 horas ago | 0

| accepted

Answered
for loop outsite functions
Can't you just put the loop in your pushbutton function and pass the loop variable to your other functions? function Messungsta...

2 días ago | 0

Answered
Deleting every n rows in matrix
newMatrix=oldMatrix(1:15:end,:);

2 días ago | 1

| accepted

Answered
Only saving last run for loop
pie(1)=0; for i=1: 560; z=z+dz; pie(i+1)=pie(i)-((g/(cp*thetav(z)))*z); end

4 días ago | 1

| accepted

Answered
implement the A matrix using for loop
Why do you need a for-loop? Looks like you have the idea. A=zeros(2*length(x),6); A(1:2:end,1)=x; A(1:2:end,2)=y; A(1:2:end,...

6 días ago | 0

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Answered
Creating a histogram,
Use histogram(), the matlab documentation is quite good. https://www.mathworks.com/help/matlab/ref/matlab.graphics.chart.primit...

6 días ago | 0

Answered
Indexing a value from other cell arrays into a new column
for k=1:size(distances,1) a=flip(indeces(distances(k,1),:)); distances(k,3)=arrays(a(1),a(2)); end

7 días ago | 0

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Answered
Defining an anonymous function with 3*(N+1) variables
f=prod(exp(-beta*(diff(x(1:n+1)).^2+diff(x(n+2:2*n+2)).^2+diff(x(2*n+3:3*n+3)).^2)))*sum((x(1:n+1)-x(1:n+1)').^2+(x(n+2:2*n+2)-x...

7 días ago | 0

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Answered
line 15 does not work
If you inspect your variables before plotting, you will find that y is a single column. plot(t,y,'-');%this will work in your c...

7 días ago | 0

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Solved


Find the Pattern 9

7 días ago

Answered
How to solve an elliptical integral with the unknown in the integrand?
If you plot for C=0:100, you find that bcInt never exceeds 1. Re = 100; alpha = 15/360*2*pi; x=0:100; bc = @(f, C) 1./(((1-f...

8 días ago | 1

Answered
How to add numeric values to cell array?
for k=1:length(names) names{k}=[names{k},' ',num2str(val(k))]; end

8 días ago | 0

Answered
How to store words and numbers table in an array
Why not set up a struct? s = struct('a',{},'b',{},'c',{});%label the fields to whatever you want for k=1:11 s(k).a=%'Buildi...

8 días ago | 0

Answered
how to use fzero function?
First, fzero finds roots of nonlinear functions and should not be symbolic. If you have a polynomial you should use roots() func...

8 días ago | 0

Answered
How to "invert" integral function?
I might not understand your question completely. If you know the temperature and interested wavelength range, the curve can be g...

8 días ago | 1

Answered
How to stop rounding values when i use array?
The values in your array (a) are not rounded, they are only rounded in the display of them. To see the actual values, change for...

8 días ago | 0

Answered
convert image matrix to row vector
yourMatrix(:)';

8 días ago | 0

Solved


Consecutive Equation Times (of the day)
Many times throughout the day can represent mathematical equations. In this problem, we focus on the largest consecutive run of ...

9 días ago

Solved


Equation Times (of the day)
Many times throughout the day can represent mathematical equations. In this problem, we focus on times that include the four bas...

9 días ago

Solved


Draw Letter 'L'

9 días ago

Solved


Count the square-full divisors of a number

9 días ago

Solved


center of mass
R is a given matrix with size [n,2]. R(i,:) is interpreted as the 2D-position of a mass point with mass i. Calculate the center ...

9 días ago

Solved


Bernoulli's Equation
Bernoulli's equation states that for an incompressible fluid the following summation is constant across the flow: v^2/2 + g*z + ...

9 días ago

Answered
Trying to solve a four variable equation for a range of values
If you want all possible combinations, then use ndgrid. Z0=1.5; Fmin=0:10; Rn=1:20; gammas=-10:1; gammopt=13:.1:20;%I have ...

9 días ago | 0

Answered
How write closed interval inside loop
You should just make g1, g2, and g3 matrices. No loop is necessary. g1=[l1',m1'-2*v1',m1'+3*v1',2*u1']; g2=[l2',m2'-4*v2',m2'+...

10 días ago | 0

| accepted

Solved


Number Puzzle - 108

10 días ago

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