David Hill

Last seen: 1일 전

3,466 2017 이후 총 참여 횟수

David Hill's 배지

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Could someone explain this straight line function?
It is point-slope form of a line. If the points are a=[x2, y2] and b=[x1, y1], then: m=(a(2)-b(2))/(a(1)-b(1));%slope func =@(...

4일 전 | 0

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How can I move the bars in a bar chart?
figure; bar_displacement=.25;%play with this until it is correct bar(x-bar_displacement,y); set(gca,'XTick', x);

6일 전 | 0

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ignore NaN values in loop
CC=[]; for i = 2:16 A = walknov(:,i); A = interpft(A(~isnan(A)), 100); if isempty(A) CC=[CC;nan(1,100)]; ...

6일 전 | 0

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using for loop plotting problem help me
What are you trying to plot? f= @(x) 3*x.^5+7*sin(x).^2;%I doubt you want sind fd= @(x) 15*x.^4+7*sin(2*x).^2+3*x.^5+7*sin(x)...

6일 전 | 0

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Conditional statements on array.
i=reshape(Input,12,[])'>100; Output=zeros(size(i)); for k=1:size(i,1) if nnz(i(k,:))>0 Output(k,:)=1; end ...

6일 전 | 1

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what it does mean?
If the matrix 'index' indexed at (1,1) equals 1, then assign S1 =0 and S2 = 0. if index(1,1)==1 S1=0; S2=1; end

6일 전 | 0

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for loop issue not all answer printing out
function T = InterestPayment(P,r) for n=1:10 A(n) = P*((r*(1+r)^n)/((1+r)^n-1)); end T= table ((1:10)',A', 'VariableN...

7일 전 | 0

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How can I find the nonzero values in an cells array?.
Non_ceros=zeros(length(Index)); for i = 1 : length(Index) for j = 1 : length(Index) Non_ceros(i,j) = nnz(In...

7일 전 | 0

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wanna creat a matrix of unknowns and write some equations with those unknowns and then take the matrix of coefficients
syms a b c d; t=[a b;c d]; coef=[2 3]; eqn=dot(coef,t(1,:));

7일 전 | 0

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for loop help - Newton's method
I would avoid symbolic unless you need to. f = [2,-6,-12,20,42,18]; df = polyder(f); tol=1e-10; error=1; x=[-2,4];%initial ...

7일 전 | 0

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store user input in an array
user_input= zeros(1,10); for i = 1:10 while user_input(i)<=0 user_input(i) = input('Enter positive real number : '); ...

7일 전 | 0

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How to convert binary bits of a vector, say m, after rotating it left by 1 bit, into decimal ?
m = [16; 10]; %use column vector a = fi(m, 0, 8, 0); b = bin(bitrol(a, 1)); c = bin2dec(b);

7일 전 | 0

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Generate random numbers in the second decimal point
x=1.198:0.1:2.198; x=x-(randi(6,size(x))+3)/100;

11일 전 | 1

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How to optimize the calculation of the mean between the elements of A and B efficiently?
C=(A+B)/2;

13일 전 | 0

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DOE points normal distrbution
m=standard_deviation.*randn(1,1000)+mean;%generates an array of 1000 numbers

14일 전 | 0

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Finding an unknown vector from three known vectors
syms x y z; C=[x,y,z]; A = [125 350 -80]; B = [-115 350 -80]; D = [-15 530 545]; eq1=norm(A-C)==300; eq2=norm(B-C)==300;...

14일 전 | 0

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Unable to concatenate the table variables 'Var1' and 'Var2', because their types are double and cell.
Why not just readmatrix? What column are you skipping? p = readmatrix('Arrone-pluviometro(36045)-2019-0-24'); p(isnan(p))=9999...

15일 전 | 0

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Integrate definite integral with system of differential equations
Can you just do something like this? function dydt = odefun(t, y, c) dydt(1,:) = 1./(1+t.^2) ; % h(t) h=@(x)1./(1+x.^2); ...

15일 전 | 0

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How can I implement a loop to find the minimum among 5 values
Are you not allowed to use the min() function? function D = myfun(A) D=min([.1 3 5 8 12]./cumprod(A));

15일 전 | 0

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Using fzero on function
y=@(x)x.^6-2.*cos(x); x=linspace(-3,3,100); plot(x,y(x)); z(1)=fzero(y,-1); z(2)=fzero(y,1);

15일 전 | 0

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How to Define a Symbolic Continued Fraction
function L = continuedFraction(N,n) syms A B; if n==0 L=0; else L=1/(B/(N-1)+A/N+continuedFraction(N,n-1)); end R...

15일 전 | 1

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FSOLVE with For loop
Not sure what values you what for b, but you will not to do a surf plot or plot3 (3d plot) f=@(x,b)x.^3.*b+exp(-b.^2)+x.*b-500;...

15일 전 | 0

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Issue with creating a plot from two for loops
a=1.63279*10^-6; b=264.9889; T=373:10:1273; Mu = (a*T.^0.5)./(1+b./T); n = 0.666; T0 = 273; Mu0 = 1.375*10^-5; MuT = Mu0....

16일 전 | 1

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Replace secondary diagonal elements of a square array
Replace all the secondary diagonal elements of the square array A with the number n Example: A = [1 2 3 4 5 6 ...

25일 전

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Compound interest - number e
A moneylender wants to receive his annual interest of 12% more frequently. If he receives his interest rate every six months,...

25일 전

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Double the next and alternate sign

25일 전

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Find the slope

25일 전

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Potential energy calculation

25일 전

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Total energy