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# Alex Mcaulley

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255 total contributions since 2019

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How to make statements intersect
a=[0 1 2]; b=[1 1 3]; if all(a==b) fprintf ('yes') else fprintf ('no') end

4 dagar ago | 1

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how to find size of scale bar on image
One approach would be: First, you need to segment the scale bar using any segmentation function, for example imbinarize (using ...

15 dagar ago | 0

Find the diameter of the parts in an image processing?
One approach would be: First, you need to segment the objects you want using any segmentation function, for example imbinarize,...

15 dagar ago | 0

How to select the columns of a matrix which are a multiple of 5?
N = M(3,5:5:end)

16 dagar ago | 0

Adding to the first value in a matrix based on the second value in that row.
Being A your matrix: A(A(:,2) == 11 | A(:,2) == 12,1) = A(A(:,2) == 11 | A(:,2) == 12,1) + 1

18 dagar ago | 0

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Creating an array from 1 to n
n = 10 % 1:n ans = 1 2 3 4 5 6 7 8 9 10

ungefär en månad ago | 1

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How can I create n arrays of size 100 each with random integer values?
c = cell(1,100) for i = 1:100 c{i} = randi(100,1,100) end

ungefär en månad ago | 1

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Smoothing jumps when using unwrap()
You need to have a jump higher than pi to avoid the small jumps using unwrap (and this is not you case). Then, a trick you can d...

ungefär en månad ago | 0

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How to separate a variable out of trigonomic expression
It is not a Matlab question, but you can do: cos(a+b)/sin(a+b) = 1/tg(a+b) = (1-tg(a)*tg(b))/(tg(a)+tg(b))

ungefär en månad ago | 1

How to run a loop with different values and plot the result?
Yo can do it with an external loop with dt: for dt = 1:10 x=5; x_arr=[]; x_arr(1)=x; for i=1:10/dt ...

ungefär 2 månader ago | 1

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Integration fo function A(c) from -inf to +inf
A = @(c) sqrt(m/(2*pi*k*T1))*exp(-m/(2*k*T1)*(c-c_bar1)^2) q = integral(A,-inf,inf)

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how do I append to an array within a loop with float values?
Try with this: k = 0:0.1:20; solutions = zeros(size(k)); for ii = 1:numel(k) a = -k(ii); b = -k(ii); soln= ...

Is it another command using to compare between vector and cell?
Then, to obtain the elements of U that doesn't exist in S, you can do: U = [1,2,3]; S = {1,2}; w = U(~ismember(U,cell2mat(S))...

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How do I store the changing values of a variable (generated in a for loop) into a single file without overwriting the previous one?
n = 100; areatriangle = zeros(1,n) for ii = 1 : n areatriangle(ii) = .5*((ii/2)*ii); end or: areatriangle = .5/2*(1:n)...

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How to find the position of points in a coordinate system?
Using for loops: R = zeros(numel(X),numel(Z)); for i = X for j = Z R(i,j) = sqrt(i.^2+j.^2); end end

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position of values in a matrix
A = [23 24 35 2 12 19 24 23 12 15 26 17] loc = find(ismember(A,[35 2],'rows')) loc = 2

How to put a value in a plot label?
depth = [5,10,15,20]; for k = 1:4 kd = 0.0143.*5*k; SOTE = (a + kd + kp).*X.^beta.*5*k; figure(1) if k < 3 ...

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Why is this code not reading the csv file?
The images are useless, but the error is clear, your variable tdata doesn't exist. I guess you need to change this line: tdata ...

ODE45, simple events
function [check,stop,direction]=landing(t,y) check = y; stop = 1; direction=0; end

How to gracefully generate an all-one cell array?
function Output=OnesInCell(varargin) %This function should be the same as ones() except that each of the ones is packed into an...

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How to cut dimensions of 3d arrays in a cell.
Being A your cell array: newA = arrayfun(@(i) A{i}(700:720,300:360,:),1:numel(A),'uni',0)

selection of rows in a matrix
A = [36 13 9 21 23 32 35 5 3 43] B = A([1,3,5],:)

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Cannot call files named with ' character in the text
filename = '8''_Data_Startup-1234567489'

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Exporting data from matlab to a excel with a special pathway
xlswrite(filename,Y1,1) xlswrite(filename,Y2,2) xlswrite(filename,Y3,3)

How do I code a function that's supposed to be an infinite pattern?
Another possibility: res = sum(x.*circshift(y,-1) - y.*circshift(x,-1))

Best way to calculate the determinants of a series of matrices?
delta = arrayfun(@(t) det(squeeze(G(t,:,:))),1:size(G,1));

what is the error in this program
There is no error in your code, the problem is that it doesn't do whatt you want. I guess you want something like this (without ...

Errror using imwrite, can't use "append" in 'WriteMode'
You are changing the file name for each frame, resulting in different tif images. To build a tif stack you just need to use ONE ...

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How to generate a random integer between two bounds?
randi([4,500])