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David Hill


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4 064 total contributions since 2017

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

ungefär 2 timmar 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...

ungefär 24 timmar ago | 0

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

ungefär 24 timmar 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

3 dagar 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,...

5 dagar ago | 0

| accepted

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

5 dagar 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

6 dagar ago | 0

| accepted

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...

6 dagar ago | 0

| accepted

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...

6 dagar ago | 0

| accepted

Solved


Find the Pattern 9

6 dagar 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...

7 dagar ago | 1

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

7 dagar 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...

7 dagar 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...

7 dagar 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...

7 dagar 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...

7 dagar ago | 0

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

7 dagar 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 ...

8 dagar 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...

8 dagar ago

Solved


Draw Letter 'L'

8 dagar 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 ...

8 dagar 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 + ...

8 dagar 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 ...

8 dagar 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'+...

9 dagar ago | 0

| accepted

Solved


Number Puzzle - 108

9 dagar ago

Solved


Number Puzzle - 107

9 dagar ago

Solved


Number Puzzle - 106

9 dagar ago

Solved


Number Puzzle - 105

9 dagar ago

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