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How can I solve this complex 4 equation with 4 unknowns variables
You can specify 'MaxDegree' as input to solve() syms K1 K2 K3 K4 equ1 = K2+K4-36 equ2 = K2*K4+K3+K1-486 equ3 = K2+2*K2*K3+2*...

fast 4 Jahre vor | 0

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Do I need to uninstall another version of MATLAB before installing an new version with different products?
MATLAB installations are independent of each other. You can delete the previous installation directory directly before installin...

fast 4 Jahre vor | 0

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Contour plot of XYZ data
Try this x = hfm(:,1); y = hfm(:,2); z = hfm(:,3); xg = linspace(min(x),max(x)); yg = linspace(min(y),max(y)); [Xg, Yg] ...

fast 4 Jahre vor | 0

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How to find inverse kinematics given D-H parameters?
First create a rigidBodyTree from dh parameters: https://www.mathworks.com/help/robotics/ref/rigidbodyjoint.setfixedtransform.ht...

fast 4 Jahre vor | 0

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Building an Neural network with multiple inputs
The 10 in the line feedforwardnet(10, 'trainlm'); have nothing to do with the number of inputs. You can put any number here. I...

fast 4 Jahre vor | 0

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Questions about making websites that run user applications
One option might be to use the MATLAB App server, but it seems that it is basically designed for an organization's internal use,...

fast 4 Jahre vor | 0

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How to hide web browser while using web function
Which function are you using to download the data? You can use websave(): https://www.mathworks.com/help/releases/R2020b/matlab/...

fast 4 Jahre vor | 0

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machine eps related query
It happens because of finite precision of double() precision datatype: https://en.wikipedia.org/wiki/Double-precision_floating-p...

fast 4 Jahre vor | 0

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Add markers to a contour plot
It is not possible with single call of contour(). You need to hold the axes and then make a seperate call to plot() or scatter()...

fast 4 Jahre vor | 0

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How to Use?: New "Name=Value" Syntax for 2021a
I don't have access to R2021a, but I guess it is supposed to be something like this plot(XData,YData,'LineStyle=-','MarkerSize=...

fast 4 Jahre vor | 0

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How can I generate an Impulse Train of specific Sampling Frequency?
Try this T = 1; x = -5*T:5*T; stem(x, ones(size(x))) ylim([0 1.5])

fast 4 Jahre vor | 0

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how do I shade area under graph with specific x interval?
Try something like this a=10; t=0:0.1:200; c_L=0.2.*(1-exp(1).^(-1/a.*t)); t_shade = 60:0.1:200; c_L_shade = 0.2.*(1-exp(...

fast 4 Jahre vor | 0

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Solving Equations in MATLAB
There is no general solution to such a problem. A common way is to specify several starting points for the numerical solver and ...

fast 4 Jahre vor | 0

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How can I generate the Hankel matrix using the measured datapoints?
Try something like this y = [0 1 3 5 7; 0 2 4 6 8]; k = 2; % Y rows in output matrix [m, n] = size(y); i = hankel(1:n); i...

fast 4 Jahre vor | 0

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displaying RGB colours using SURF.
You can use texture mapping to display an RGB image on a surface(). See here: https://www.mathworks.com/matlabcentral/answers/91...

fast 4 Jahre vor | 0

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how to calculate the average for each row of cell array
First use cell2mat() and then apply mean() along rows R_mean = mean(cell2mat(R), 2)

fast 4 Jahre vor | 1

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How to add trendline to scatterplot?
Something like this x = [2 1 4 68 4 5] y = [5 4 2 23 21 50] p = polyfit(x, y, 1); px = [min(x) max(x)]; py = polyval(p, ...

fast 4 Jahre vor | 5

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Generating and plotting functions.
The exponent also contain abs() function. You can write it like this t = -1:0.1:3; y = exp(-abs(t)/5); plot(t,y) Also, the u...

fast 4 Jahre vor | 0

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Why unifrnd(lb,ub,[nPop,D]) gives error?
This cannot be done in single call to unifrnd. You need a for-loop lb = [0 0 0 0]; ub=[10 10 pi pi]; nPop=30; D = numel(lb); ...

fast 4 Jahre vor | 0

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Calculating mean of different ranges in a Table
There are several ways to do this in MATLAB. Following shows one option M = rand(900, 10); C = mat2cell(M, 300*ones(size(M,1...

fast 4 Jahre vor | 0

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How can I add column with for loop
The question is not clear. Are you looking for something like this url = {'nam1', 'nam2', 'nam3','nam5', 'name5', 'nam6'}; x...

fast 4 Jahre vor | 0

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Phase portrait of the system in a rectangle
You can use quiver(). For example, [x,y] = meshgrid(linspace(-1,1,20)); dx = 2*x-y-5; dy = 3*x-2*y-9; quiver(x, y, dx, d...

fast 4 Jahre vor | 0

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Interpolation over datetime for 2 arrays
Your data is not directly in the correct format for interp1(). You first need to pre-process your data. For example CGM_date = ...

fast 4 Jahre vor | 0

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please help me with this
Use square brackets instead of parenthesis in the definition of eqns syms t1 t2 t3 t4 t5 t6 eqns = [-0.7591*t1+0.3789*t2 == -...

fast 4 Jahre vor | 1

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function repeat number?
combvec() from the Deep learning toolbox is most easiest solution a = [1 2 3] b = [1 2 3] C = combvec(a, b).'; % if the order...

fast 4 Jahre vor | 1

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Calculate the mean of multiple 3D arrays layer by layer
I am not sure why you are concerned about the layers. You are just taking an element-wise average of two matrices. Talking about...

fast 4 Jahre vor | 0

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How do I create a function that solves systems of linear equations of N size?
"Is it possible to make a function like this?" Yes. Just name it something else, since size() is a built-in function. x = mySi...

fast 4 Jahre vor | 0

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function day is not working in matlab 2020a
Function day() is defined for datetime input arguments. For example >> t = datetime('now'); >> day(t) ans = 21

fast 4 Jahre vor | 0

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problrem for desactivate MATALB on my old PC
Try deactivating the license on the old PC using the license center: https://www.mathworks.com/mwaccount/. Go to this link, sele...

fast 4 Jahre vor | 1

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Export big subplot problem
Which command are you using to save the pdf file? Are you using the GUI? I suggest using the exportgraphics(): https://www.mathw...

fast 4 Jahre vor | 0