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Alex Mcaulley


Last seen: 11 maanden ago Active since 2019

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Answered
i want to compare between 3 matrices
Use isequal: if isequal(I1,I2,I3) disp('I1 == I2 == I3') end

meer dan een jaar ago | 1

Answered
How to plot polynomial function correctly?
Your code is working fine, the difference is just the axis limits. Try this: d = @(g)1-5*g-2.5*g.^2+6*g.^3+5*g.^4; e = -2:1/10...

meer dan een jaar ago | 1

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Answered
produce all combinations of n choose k in binary
One option (Probably a better implementation can be done, but this one should work): n = 5; k = 3; comb = nchoosek(1:n,k); ...

meer dan een jaar ago | 0

Answered
I have daily data from 1969 to 2018. I want to remove the rows corresponding to 29-02 day from the matrix. How should I proceed?
Another option: [~,~,raw] = xlsread('sample.xlsx'); raw(contains(raw(:,1),'29/02'),:) = [];

meer dan een jaar ago | 0

Answered
How I input an array of numbers in GUI text box?
Use str2num instead: x=str2num(get(handles.edit1,'string'));

meer dan een jaar ago | 0

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How to remove NaN's from an array AND the corresponding value/element in another array of the same size?
x1 = A(~isnan(B)); y1 = B(~isnan(B));

meer dan een jaar ago | 1

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Answered
Which function do I need to use to plot 3D
Try surf

meer dan een jaar ago | 0

Answered
Problem with loop index
A simple way to do that avoiding the loop is: idx = ismember(FinAti.Data,rm_zerohoras); FinAti(idx,:) = [];

meer dan een jaar ago | 0

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Answered
How can I make each cell array consistent in size?
N = max(cellfun('size',P,1)); M = max(cellfun('size',P,2)); newP = cellfun(@(x) [x, zeros(size(x, 1), M-size(x, 2)); zero...

meer dan een jaar ago | 0

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Answered
Reshape the vector as indexed matrix.
Yes, just removing the for loop because this loop doesn't do anything in your code.

meer dan een jaar ago | 0

Answered
i received an error (index must be a positive integer or logical. Error in Guassseidal3 (line 24) U(i,0)=0;) in solving PDE problems. plz help me to get out of this problem.
0 is not a valid index in Matlab. To take the first element you should put 1: U(i,1)=0;

meer dan een jaar ago | 0

Answered
Need to remove elements which repeated 2 times
A=[1 2; 1,3; 1,4; 1,5; 2,3; 3,6; 4,5; 5,6]; N=max(max(A)); A_new = A; for i=1:N if sum(sum(A==i),2)==2 A_new(an...

meer dan een jaar ago | 0

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Answered
How to store values in matrix with similar index number of other matrix?
A_new = B(A)

meer dan een jaar ago | 0

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Answered
How can I make each cell array consistent in length?
Do you mean this? N = cellfun(@numel, T_mon); M = max(N); T_mon_new = cellfun(@(a) [a; zeros(M - numel(a),1)],T_mon,'uni',0);...

meer dan een jaar ago | 0

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Answered
I get the following error "Dimensions of arrays being concatenated are not consistent."
Are you defining row vectors? Use ... in each line w20=[2.22939364554e-13,4.39934099226e-10,1.08606937077e-7,... 7.8025564785e...

meer dan een jaar ago | 0

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Answered
Index exceeds array elements
The problem is in this line (you are changing the size of the array inside the loop): guess_vector(j) = [] One option could be...

meer dan een jaar ago | 0

Answered
How do I record the entire row of a matrix if it has a peak value in the third column?
Try this: [~,locs] = findpeaks(xyK(:,3)); sol = xyK(locs,:);

meer dan een jaar ago | 0

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Answered
repeating a sequence of code
Do you mean this? n = 1; while n ~= 3 disp(' Choose an Option Below '); disp(' 1 Convert Decimal Number to Binary ...

meer dan een jaar ago | 0

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Answered
creating array with entries as numbers
Do you mean this? n = 1.44:0.001:1.45;

meer dan een jaar ago | 0

Answered
More efficient "for i in array" loops
Using your equations directly: x = [1 2 3 4 5 6]; c = 1; cos_theta = (1-((2*x)/c)); theta = acos(cos_theta);

meer dan een jaar ago | 0

Answered
My code won't run. It says there is an error in line 30.
There is an error in your calls to matlabFunction: function [] = Newton(f, x1, tol, N) % % Newton uses Newton’s method to app...

meer dan een jaar ago | 0

Answered
How to remove multiple elements in a row matrix
This is a very basic problem. I recommend you to do the Matlab tutorial Being A your array: A = A(2835:end);

meer dan een jaar ago | 0

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Converting matirx into vektor inside a cell array
Try with this: for i=1:n for j=1:m ev1{j,i} = V{j,i}(:,1); ev2{j,i} = V{j,i}(:,2); end end

meer dan een jaar ago | 0

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Answered
How to solve a matrix quadratic equation?
syms w solve(det(K-w^2*M),w)

meer dan een jaar ago | 0

Answered
campare a row value with the next row
Another option: a = [1;1;0;0;0;1;0;1;0;1]; b = diff(a); b(~b) = 2*a(~b); sol = splitapply(@numel,b,b+2) %Ordered as [1,0],...

meer dan een jaar ago | 1

Answered
Solve a quadratic equation
To use the function roots you need to reformulate your equation: tau = 0.1 f4 = [3; 2; 6; 8] f8 = [2; 6; 7; 3] eq = @(f4,f...

meer dan een jaar ago | 0

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Answered
Error: Attempt to execute SCRIPT mesh as a function
Because your live script has the same name than the function mesh and when you call this function, in fact you are calling your ...

meer dan een jaar ago | 0

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Answered
Index exceeds the number of array elements (1).
VarHigh is a constant and you are using it as an array... VarHigh(2) %Throws an error

meer dan een jaar ago | 0

Answered
How would I write this code without using loops?
Another option: N = 1000; five = 2*5:5:N; seven = 2*7:7:N; res = setxor(five,seven)

meer dan een jaar ago | 0

Answered
Hold on Not showing all of my plots on one graph
Take a look at the variables you are plotting, they are duplicated. I mean Bsigmay is equal to sigmay, Bsigmaz is equal to sigma...

meer dan een jaar ago | 0

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