Answered
How to plot binary matrix as dots?
Try this — M = randi([0 1],25)>0; % Logical Matrix [r,c] = find(M); figure scatter...

5 years ago | 0

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Answered
Error using lsqcurvefit (line 271) Function value and YDATA sizes are not equal.
The ‘Lp_Ps_Vb’ function is going to return ‘X’ that is going to be a (numel(t) x 2) matrix, so lsqcurvefit needs to have a match...

5 years ago | 0

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Answered
Drawing a line to divide two parts of a curve
Try this — x = linspace(0, 20); y = (1-exp(-0.1*x)); xq = 10; yq = interp1(x,y,xq) figure plot(x, y) hold on plot([1 ...

5 years ago | 0

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Answered
find a value between two points
Use interp1 or fzero on a monotonically-increasing (or decreasing) curve such as that. Example — x = linspace(0, 50); y = ...

5 years ago | 0

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Answered
How do I fit the Gaussian distribution?
It gave a much better result when I ran it (R2021a) — LD = load('noise_filt.mat'); noise_filt = LD.noise_filt; figure hhf...

5 years ago | 0

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Answered
error in axis! help me
In this axis call: axis([0 bp*length(demodulated_data) -0.5 1.5]) there was originally an extra 0 just after the length call,...

5 years ago | 1

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Answered
Reconstruct signal using ISTFT after cutting off frequecies
Set the amplitude values at those frequencies to 0 rather than eliminating them from the vector. .

5 years ago | 0

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Answered
Reading multiple files in multiple loops
The separate ‘g’ loop is not necessary, since it can be created either using a counter or by calculating it. See if this does...

5 years ago | 0

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Answered
Error while integrating bessel functions
The problem is: Q = @(s) 2*(1 - (nu.^2))./(s.*E).*(1./(a(s) + b(s))); ↑ ↑ ← HER...

5 years ago | 0

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Answered
EEMD(ensemble EMD)
I am not absolutely certain what the problem is, because ‘does not work’ can mean just about anything. Note that according to...

5 years ago | 0

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Answered
conditioning array with complex number
This can probably be combined into fewer actual lines. I kept them separate to demonstrate the approach — A = complex(rand(...

5 years ago | 0

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Answered
frequency of letters in English message
One approach — plain= 'my name is samah samir and i am engineer'; ltrs = double(plain); ltrs = ltrs(ltrs>32)-double('a')+1; ...

5 years ago | 0

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Answered
Change "matrix" to a scalar
If you want to square the elements of ‘var’ use element-wise exponentiation (the ‘dot operator’). var=var*(1-(1/(i-1)))+i*(sum1...

5 years ago | 0

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How to set scale range for a contour?
The x-axis goes from 1 to 2 because the contour plot is of a (117x2) matrix. That also explains the range of the y-axis. d...

5 years ago | 0

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Answered
How to make constant to 1 in power function in curve fitting toolbox
Use fminsearch rather than linearised polyfit for this. x1=[6.71214E-05 0.00112676 0.047319082 0.142706219 0.273947664 0.4...

5 years ago | 1

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Answered
How to use create table name variables in loop?
I am not certain that I understand what you want to do. Perhaps — randomdata = randn(33,10); NrCellArrays = fix(size(rando...

5 years ago | 0

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Answered
How to code and build a smaller array and 2D-plot charged particles to make clusters (as they are linked via indices) using charge, no of lone pair of electrons & bond order?
I am not certain what you want. I have no idea what ‘collecting the indices’ implies. Try this — T1 = readtable('https://w...

5 years ago | 0

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How can I plot an histogram?
Try something like this — number_of_events=[30.60, 32.30, 32.30, 32.30, 32.30, 2.60, 12.60, 32.30, 32.30, 9.70, 25, 13.20, 1...

5 years ago | 0

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Answered
What equivalent MATLAB commands plots PDF of data like 'hist' command plots histogram of data.
See if the histfit function does what you want. .

5 years ago | 0

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Answered
How can I make MATLAB shade the area of the virtual intersection between two lines?
Both fill and patch require a closed region — x1 = ones(1,10); y1 = ones(1,1000000); n1 = 10^10:10000000000:10^16; T1 = 10:...

5 years ago | 1

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Answered
stop execution of code to check results
I would just display it instead — if i == 100000 fprintf('Parameter = %f at iteration %d\n', Parameter, i) end Also...

5 years ago | 0

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Answered
simulate free fall project, ode45, using reynolds no to get drag coefficient, recursive problem
The NaN values are the result of 0/0 operations, and when that occurs in the first integration, it propagates through all of the...

5 years ago | 0

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Answered
How can I plot single points, each having a different color, of two arrays(as x, and y) using a for loop?
See the documentation on scatter to see all its optional arguments and features. x = rand(12,1); y = rand(12,1); figure...

5 years ago | 0

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How can I extend the data in the x direction.
Try this — y5000 = feval(f, 5000) I cannot run the posted code (no data) so I am posting this as UNTESTED CODE. It shoul...

5 years ago | 0

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Answered
how to store array
Try something like this — xv=1:5; for k = 1:numel(xv) x = xv(k); A=[5*x 0;2*x^2 1]; B=[0;2.55]; Y(:,x)=...

5 years ago | 0

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Answered
How to replace diagonal of square matrices within a cell array?
The easiest way is to subtract the diagonal of each matrix from the matrix — C = {rand(4); rand(4); rand(4)} Cr = cellfun...

5 years ago | 0

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Answered
How do I fit a gaussian to a bar plot and extract the variance of the gaussian?
One approach — x=[8,11,8,10,8,21,26,33,28,8,17,7,4,10,12]; y=1:15; [fitobject,gof]=fit(y',x','gauss1'); figure bar(y,x) ...

5 years ago | 0

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Answered
How to extract certain values from text file to find average of the group of numbers?
Try this — T1 = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/734899/Sujata%20Dhar%20%20text%20fil...

5 years ago | 0

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Answered
Can only find one double angle formula of cos(2x).
Experiment with various options to get at least one more identity — syms x f(x) = cos(2*x) f1 = expand (f) f2 = rewrite(f,...

5 years ago | 0

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Answered
ODE solver (45) giving two solutions (i.e. two plots) for an ODE! How do I plot only the one I need?
Use element-wise division H2= (k^2*(V+Y(:,3)+Y(:,4)))./(3-((k^2/2).*Y(:,2).^2)) ↑ ← HERE then ‘H2...

5 years ago | 1

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