Answered
Displaying arrays alongside fprintf() text.
Try this: A = zeros(5); TA = array2table(A, 'VariableNames',num2cell('A':char('A'+size(A,2)-1)), 'RowNames',num2cell('A':char...

5 years ago | 0

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Answered
How to fitt a power function to data
This uses only basic MATLAB functions. No Toolboxes are required. x = 1:100; ...

5 years ago | 0

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Try to solve System of Linear Equations
One option: syms x y eqn1 = x+y == 250; eqn2= 10*x+45*y ==24000; eqn3 = x+3*y ==3360; eqn4 = 10*x+15*y ==1440; eqns = [e...

5 years ago | 1

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Answered
Input argument "x" is undefined.
Instead of using the single quotes, call the function in ode45 with a function handle as: [t,x]=ode45(@ckt,tspan,x0); so the ...

5 years ago | 0

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Answered
Matlab graph not showing
Use element-wise division (./) instead of (/) and it works — s1=0.535*exp(1i*2*pi/3); s2=0.535*exp(1i*pi); s3=0.535*exp(1i*4*p...

5 years ago | 0

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Answered
Step response with initial condition
To set the step amplitude to 10, try this: k=0.2; t2=400; s = tf('s'); u_del=(0.0022*k*(s+0.06931)*(s^2+0.4852*s+0.1492))/(...

5 years ago | 0

Answered
Plotting date (number) on x-axis
It is necessary to be creative with the plot and the tick labels. Try this: DL = load('april.mat'); ex1 = DL.ex1; Q1 = ex...

5 years ago | 0

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Answered
Error in using syms
Remove the single quotes, define ‘x’ as ‘x(t)’, and define ‘Dx’ (and ‘D2x’ if you want to), explicity: syms x(t) t s X F Dx ...

5 years ago | 1

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Answered
using the vertical bars in calculation
I am not sure what you are asking. Perhaps the abs function?

5 years ago | 0

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Answered
How can I plot sequential data of a matrix
Try this: A = [0 329.62 0.01 329.61 0.014 329.60 0.2 329.59 0.00 329.63 0.05 329....

5 years ago | 1

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Answered
How can we fill a region defined by a implicit function?
I am not certain what you want. Try this: f=@(x,y) sin(x).*sin(y)-0.5; figure fp1=fimplicit(f,[-10,10,-10,10]); hold o...

5 years ago | 1

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Answered
Keep y value below certain value in a loop
Try something like this: x = linspace(0, 5*pi, 250); Capacity = 0.7; limit_y = @(y,Capacity) (y<0).*0 + (y>Capacity).*Capaci...

5 years ago | 0

Answered
Error converting from sym to double: Unable to convert expression into double array
Try this to create ‘T’ as a vector: n = 5 % Define ‘n’ syms T T = sym('T', [1 n]) produc...

5 years ago | 0

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Answered
How to calculate the area between two curves separately based on being below or above.
Try something like this: t = linspace(0, 10*pi, 500); % Create Data y1 = exp(-0.1*t) .* si...

5 years ago | 0

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Answered
making matrix of matrices of specific inputs
Try this: for a = 1:numel(length_x11) % for b = 0:9 i11 = length_x11(a); j21 = length_y21(a); ...

5 years ago | 0

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Answered
Filled 2D plot
My apologies for the delay. I was working on other things most of today. ‘However, to make the data more concise, I am try...

5 years ago | 0

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Answered
Unrecognized function or variable 'visadevlist'.
The visadevlist function requires the Instrument Control Toolbox.

5 years ago | 0

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Answered
Multiple griddata calls into a single one (same grid)
The arrayfun function is significantly slower than an explicit loop, at least in my experience. I would just do something lik...

5 years ago | 0

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Split Table data based on Day Names
Try this: C1 = readcell('Sample.csv'); [G,ID] = findgroups(C1(:,6)); % Idx = [4 2 6 7 5 1 3]; ...

5 years ago | 0

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Answered
How do I fit a Sinuscurve to my Data-Function, WITHOUT Cftool?
See if the approach in Curve fitting to a sinusoidal function will do what you want. It uses only core MATLAB functions, no to...

5 years ago | 0

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How do I plot fourier transform signals in Matlab
f = @ (t) exp(-abs(t)).*cos(20*t); figure fplot(f) for the Symbolic Math Toolbox, this becomes: syms t f(t) = exp(-abs(...

5 years ago | 0

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Answered
How to remove spurious lines?
Sort ‘velocity’: [velocity, idx] = sort(velocity); figure plot3(Freqs,velocity,filtered(idx)) ylim([-2 0]) xlim([2.5 15]...

5 years ago | 0

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Answered
Unknown variable complex equation
I ahve no idea what ‘Cp’ does here. Otherwise: gamma = 1.4; prat = @(Me,gamma) ((1+(gamma-1)/2.*Me.^2).^(gamma/(gamma-1)))...

5 years ago | 0

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Answered
solve equation : Empty sym: 0-by-1
The Symbolic Math Toolbox may not be appropriate for this problem. Try this: freq = linspace(10*1e3, 31*1e6,100); w = 2*pi...

5 years ago | 0

Answered
plotting 2 variables as they change with respect to one another
The solution is to subscript ‘A’. Try this: gamma = 1.4; %M=1.53 Mv = (0.1:0.01:2.19); for k1 = 1:numel(Mv) M = Mv(...

5 years ago | 0

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Divide matrix in subgroups
The mat2cell function will likely do what you want. Note that assigning each matrix to a different variable is not advisable....

5 years ago | 0

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Answered
Suggestions for financial simulation
That is an interesting problem! Use your favourite seach engine (I prefer DuckDuckGo) and search on: financial simulations usin...

5 years ago | 0

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How do I extract the amplitude and the frequency from a sine function?
Use the fft function. Calculated, interpreted, and plotted correctly, it will give all that information.

5 years ago | 0

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Returning to a function and changing variables if ans is false?
I would do something like this, and treat it as an optimization (specifically root-finding) problem, returning the value of ‘dRo...

5 years ago | 1

Answered
How to reduce the size of a graph to see the title and a legend that are not displayed?
Try something like this: figure plot( ... ) title( ... ) legend( ... ) pos = get(gcf, 'Position') set(gcf, 'Position',pos...

5 years ago | 0