Answered
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

Answered
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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Answered
steady state responce of LTI system
Try this — A=[-0.0295 0.0478 0 -9.81;-0.1777 -1.4411 120 0;0.0005 -0.033 -1.5345 0;0 0 1 0] B=[0;-12.81;-6.59;0] C=[0 0 0 ...

5 years ago | 0

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Answered
How do I solve this error?
The value of ‘Ea’ in the exponential call makes the integral effectively zero of all the values of ‘V’. LD = load('V[1].mat...

5 years ago | 0

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Answered
adding each element of a matrix by previous elements of that row.
Try this — a = [1 2 3;4 5 6;7 8 9] acs = cumsum(a,2) b = acs ./ (1:size(a,2)) ratsb = rats(b) Experiment to get differ...

5 years ago | 1

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Answered
How do I only highlight the decreasing portion of the green in the plot with the find function?
The vector in the plot image (or the code to create it) are not available, so I substituted my own. This should get you star...

5 years ago | 0

Answered
Arrow of a vector ( r, theta) from a point (x,y).
One approach (using the quiver function) — x = rand y = rand r = rand theta = 30; ...

5 years ago | 2

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Answered
Label the actual data points in y-axis
One approach — x = linspace(0, 10, 5); yl = 250*(1-exp(-0.5*x)); [xr,yr] = stairs(x,yl/17); figure yyaxis left plot...

5 years ago | 1

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Answered
Creating a counter inside the ode45 function
See the ode45 documentation section on ODE with Time-Dependent Terms since that is most likely what you actually want to do. (I...

5 years ago | 0

Answered
How on earth to graph discrete time signals?
The only problems were in not using element-wise operations (use the ‘dot operator’ with the exponentiation an d multiplication ...

5 years ago | 0

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Answered
how to plot a contour plot with a csv file.
It depends what the data are. If they are a matrix of values, then use contour with the matrix. If they are random x and y v...

5 years ago | 0

Answered
Intersection between two functions
Try this slightly changed version of the existing code — f1=@(x) 2.2./sqrt(2*9.81*x); f2=@(x) tanh((3.5/(2*4.5))*sqrt(2*9.8...

5 years ago | 4

Answered
How do I plot a line against the y axis?
I am not certain what you want to do. Perhaps — x = linspace(0, 2*pi); y = sin(x); subplot(2,1,1) plot(x, y) grid yl...

5 years ago | 0

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Answered
How count a number of rows in a table (meteorologica data)?
I have no idea what you are actually doing. If you want to interpolate the rows in the table, consider converting it to a timet...

5 years ago | 0

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Answered
Extract data from cell array
Perhaps cell2mat would work. or alternatively, adding square brackets to concatenate the cell contents: L1 = [B{1,1}] L2 = [B...

5 years ago | 0

Answered
Replacing for loop in the function
See if ‘func2’ (without the loop) does what you want. f = @(x) exp(-0.1*x) .* sin(2*pi*x); a = -5; b = 5; n = 10; I...

5 years ago | 1

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Answered
exponential curve fit coefficients
Linearising it by log-transforming the data is not appropriate, because that distorts the errors, making them multiplicative rat...

5 years ago | 1

Answered
How can I extract sub tables with unequally numbers of rows from main Table? Using loop or one code.
If you have specific criteria for how you want to extract the sub-tables, use logical indexing to extract specific rows. The ro...

5 years ago | 1

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Answered
why PSI values are diffrent when nlmefit using ode45 solver compared to when it uses analytical solution?
From the description, it appears that the code is attempting to fit data to the solution of a differential equation, or a system...

5 years ago | 0

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