Answered
matrix, value, comparing
One option is pdist2 — MA = [0 4.4710 8.8828 13.6977 17.7027 21.7184]; TA = [0 5.0490 9.3733 ...

5 years ago | 0

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Answered
SYMBOLIC integration often gives complex integrands
I have absolutely no idea what the actual question is, however a possible solution would be the assume function. Experiment! ...

5 years ago | 0

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Subs with 2 numbers returns a number
It is doing the substitution and the calculation at the same time, and providing the answer. Using symbolic arguments instead...

5 years ago | 0

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plotting values that comes from a if else loop
I am not certain what you are doing, so I cannot suggest specific changes. The ‘Prf’ value plots, however it is a scalar so t...

5 years ago | 0

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Legend with 15 colors
Try this — x = linspace(0, sqrt(300), 15); y = x; z = x(:)*y; figure surf(1:15, 1:15, z) grid on colormap(turbo(15))...

5 years ago | 1

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Answered
I need a picture of a graph similar to the one I posted
Add these calls after the surf call — colormap(turbo) shading('interp') The surf plot should then be close to what appears t...

5 years ago | 0

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How to create a colored, with three equally spaced rows of colors horizontally with a dimension of 6x5x3
Try this — yellow = [1,1,0]; orange = [0.8500,0.3250,0.0980]; pink = [1, 0.5, 0.8]; tci = cat (3,yellow,orange,pink); x ...

5 years ago | 2

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Answered
Log normal Distribution Equation
Since the objective is to use MATLAB for this eventually, see the documentation section on the Lognormal Distribution. .

5 years ago | 1

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Datetimes don't seem to be recognised
I’m not certain what you’re doing and I can’t run the posted code. I’m also not certain what the actual problem is. See if t...

5 years ago | 0

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how do you make a scatter plot with categorical data with connecting lines?
The data being used would help produce an appropriate response. The ‘connecting lines’ request eliminates scatter as an opt...

5 years ago | 0

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Answered
How to convolve signal and transfer function
Try this — t = linspace(0, 10) u = @(t) heaviside(t); Vin = @(t) u(t)-u(t-3); h = @(t) ( exp(-2*t)/6 ) + ( 3/16*exp(-t) )...

5 years ago | 1

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Answered
I want to read a text file that contains both text and numbers. How can I extract just certain values from it?
Try this — WingTable = readtable('FileName.txt', 'NumHeaderLines',4, 'VariableNamingRule','preserve') See the documentation f...

5 years ago | 1

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Answered
Poly with negative coefficients reverses the order
Use flip on the symbolic result instead — P=[1 -16]; %P = fliplr(P); %with or without it makes no difference syms x f =...

5 years ago | 1

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fsolve yields wrong answer
Give fsolve a complex initial estimate to get a complex root — F = @(x)((x-20.6667).^2+57.89); opts = optimoptions('fsolve'...

5 years ago | 0

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Answered
Plotting the parametric curve and its second derivative
Is that is necessary to subscript ‘k’ so that it is the same size as the other elements in the calculation — t = linspace(0...

5 years ago | 1

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Answered
How to write a code that counts how many numbers inside a vector is less than a specific vector?
Try this — k = unifrnd(1,20, 1, 1000); for k1 = 1:19 Exceeds(k1,:) = nnz(k>k1); end Value = 1:19; DesiredResult =...

5 years ago | 0

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putting error bars on bar plot?
I do not remember when ‘XEndPoints’ and ‘YEndPoints’ were introduced (and I am not able to find it in the documentation), so I i...

5 years ago | 1

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Answered
How to add subscript in xticklabels?
Try something like this — figure Ax = axes; plot(Ax, 0:2, randn(1,3)) xticks(0:2) xticklabels({'SA(MO)$_{2}$H','RSMOH','...

5 years ago | 0

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Using ode to solve a specific differential equation
Try these — % k*(dT/dt)= A*Q(1-b(T)) - S*c*E*(T^4) odefcn = @(t,T,a,b,c,E,k,Q,S) (a*Q*(1-b*T) - S*c*E*(T^4))/k; ...

5 years ago | 1

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Why bandpass filter doesn't do what it supposed to do?
I do not see what the problem is. t = linspace(0,1,1080); original = sin(100*2*pi*t)+1; LFnoise = sin(5*2*pi*t)+1; HFnoi...

5 years ago | 0

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How can I interpolate time?
Apparently ‘tim1_1’ is not a datetime array. tim1_1 = linspace(0, 1.737857815507103e+03, 51); lam_1 = sin(2*pi*1E-3*tim1_1);...

5 years ago | 0

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Answered
Export 2 Dimension out of a 3 dimensionoal Array
I am not certain what is the desired result. Usually, the intent is to separate the ‘pages’ (third dimension) of the array in...

5 years ago | 0

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how to numerically solve a coupled ode?
Use the Symbolic Math Toolbox for this. First, declare all the appropriate variables as functions of time: syms theta(t) ph...

5 years ago | 0

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Answered
I need to make 3d Matrix out of a 2d matrix
Try this — T1 = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/793254/Mechanical_loud.xlsx', 'Varia...

5 years ago | 0

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Answered
Which filter do I have to use?
See if the groupsummary function produces the desired reault. It will be necessary to experiment with it. .

5 years ago | 0

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Answered
Plotting Kinetic Model Monod, Haldane With Parameters
The problem is that in this assignment — dCdt(2,:) = (-(1/YXS)*dCdt(1))+(-(1/YPS)*dCdt(3))+(-Miusx*C(1)); ‘dCdt(3)’ has not y...

5 years ago | 0

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Answered
Input argument for ode45 function type error
Yes. Create it as an anonymous function at the outset — tspan = [0 10]; x0 = 0; f = @(t,x) (-4.76e+1*x^2 + 5.69e-9*x + 7....

5 years ago | 0

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Answered
How do I set the value of Y axis =0.02, and the plot will show me the value of x?
Use the interp1 function — x = logspace(-1, 2, 50); y = -x.^3; yi = -0.02; xi = interp1(y, x, yi) figure loglog(x, ...

5 years ago | 0

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changing the time zone for two datetime objects then comparing them
See the datetime assiciated documentation section on Specify Time Zones. .

5 years ago | 1

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Please, help me fix the first code. why is 1st code not working but the 2nd code is?
Since ‘Ca’ is actually a function of ‘X’ it has to be coded as such — Ca = @(X) (Cb0*((Ca0/Cb0) - X)); Ca0 = 8.24; Cb0 = 0...

5 years ago | 0