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Measure performance of 2 programmes
Hi, i suggest to use this: <https://de.mathworks.com/help/matlab/matlab_prog/profiling-for-improving-performance.html> ...

7年以上前 | 0

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Under Windows 10 Pro and Matlab 2017b, Matlab symbolic tool 8.0 hangs up. Could anyone help me?
Hi, try to update your matlab: <https://de.mathworks.com/matlabcentral/answers/404882-how-can-i-fix-this-freezing-problem-...

7年以上前 | 0

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plot the electrical power of a motor having for a time t=20s the values of u(ur,us,ut) and i(ir,is,it))
Hi, this is an example which should work for your purpose: % some values for U(t) and I(t) --> i take random values for ...

7年以上前 | 0

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The exact solution to a partial differential equation
Hi, this works by using the <https://de.mathworks.com/products/symbolic.html symbolic math toolbox> : % define symbolic ...

7年以上前 | 1

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How to solve these two equations for 'tau' and 'b'? All the other symbols are constants. Please help??
Hi, i used the <https://de.mathworks.com/help/symbolic/isolate.html |isolate|> function instead of <https://de.mathworks.com/...

7年以上前 | 2

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Exact solution of Boundary-Value Problem of second order ordinary differential Equation
Hi, i can not help you with an exact (analytical) solution, but here is a numeric solution: syms T(x) eqn = diff(T,...

7年以上前 | 2

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How to set an assumption on a symbolic variable in a symbolic expression?
Hi, you can use the <https://de.mathworks.com/help/symbolic/assume.html |assume|> function for this purpose. Note the sec...

7年以上前 | 0

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I have a time table with 10 columns and I want to apply same filter to multiple columns.
Hi, this is nearly the same question as you had some weeks before: <https://de.mathworks.com/matlabcentral/answers/409678-...

7年以上前 | 0

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how can i merge different codes in the main function?
Hi, you can insert as many functions as needed at the *end* (behind the code section) of your main script: some code in ...

7年以上前 | 0

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how to find out inverse of matrix?
Hi, syms m n T=[1 0 0 0 0 0;... 0 m^2 n^2 m*n 0 0;... 0 n^2 m^2 -m*n 0 0;... 0 -2*m*n 2*m*n m^2-n^2...

7年以上前 | 2

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how can I integrate this function (1/(1+x.^2)) in matlab
Hi, use <https://de.mathworks.com/help/matlab/ref/integral.html |integral|> function for this: fun = @(x) 1./(1+x.^2) s...

7年以上前 | 0

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FMINUNC cannot continue...variable missing , although variable was included to be estimated in sub-function
Hi, you use *v* as an input to your *neglogl* function. There should be at least one line in your code that associates v wi...

7年以上前 | 1

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petrosian fractal entropy estimation
Hi, you can use a function handle to do this: PFD = @(N,M) log10(N)/ (log10(N) + log10(N/(N + 0.4*M))) To calculate v...

7年以上前 | 0

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I wrote a code on PAPR reduction with non linear high power amplifier, but i am getting error as Index exceeds matrix dimensions error in line X2 = [X(1,N/2) zeros(1,K-N) X(N/2+1:N)] can anyone help me in fixing this?
Hi, you define X in a way that it is: >> X X = -1 -1 -1 -1 In the next line - which th...

7年以上前 | 0

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I need help finding critical values of my function
Hi, use <https://de.mathworks.com/help/optim/ug/fsolve.html?s_tid=doc_ta |fsolve|> on the derivates of your function. Then gi...

7年以上前 | 0

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how can i install neural network toolbox?
Hi, assuming you have a license for this toolbox, you can follow this: <https://de.mathworks.com/matlabcentral/answers/101...

8年弱前 | 0

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Having problems solving for critical values (Multi variable function)
Hi, my machine also doesnt stop being busy, when trying to solve this problem symbollically, so here is an numeric approach: ...

8年弱前 | 0

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Error with fmincon- too many input arguments
Hi, you want to use <https://de.mathworks.com/help/optim/ug/fmincon.html |fmincon|> - which accepts the inputs: x = ...

8年弱前 | 0

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Solving multiple symbolic equations to get (X/Z)
Hi, i guess you want this: syms X Y Z a b c d eqn(1) = X == a * Y + b * Z; eqn(2) = Y == c * X + d * Z; sol = s...

8年弱前 | 0

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Integrate acceleration data o get velocity and travel
Hi, bring your values into a .mat-file like the example here at the answer attached: >> acc_values acc_values = ...

8年弱前 | 0

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How to download missing functions?
Follow this: <https://de.mathworks.com/matlabcentral/answers/101885-how-do-i-install-additional-toolboxes-into-an-existing-in...

8年弱前 | 0

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lsqcurvefit question (Function value and YDATA sizes are not equal.)
Hi, Use elementwise operations to declare your function: xdata=[1,5,10,20,50]; ydata=[0.3, 1.6, 2.8, 4.6, 7.6]; ...

8年弱前 | 1

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Rewrite a long symbolic fraction with fraction bars so it is more compact
Hi, you can use: pretty to make it a bit easier reading the equations. But i would suggest to open a new _Live Sc...

8年弱前 | 0

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Where can I download R2008a?
Hi, use this link: <https://de.mathworks.com/downloads/web_downloads/select_platform?dl_action=choose_products&tab=f> t...

8年弱前 | 0

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Referencing Arbitrary Functions from other Script Files to Solve System of Equations
Hi, This looks like your script bfield is missing a function [what ever comes out] = bfield (whatever goes in...

8年弱前 | 0

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How to solve a equation that appears z2
Hi, to get numeric solution use: vpasolve(eqn,Sig) after assigning values to the other variables. Best regards ...

8年弱前 | 1

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accessing data from a struct
Hi, A = R.X assigns the Matrix saved in the field X of the struct R to A. % define empty struct R = struct(...

8年弱前 | 0

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Genetic Algorithm : Lower and Upper Bounds
Hi, the handling of bounds in the case of the use of ga is very well described here: <https://de.mathworks.com/help/gads/c...

8年弱前 | 1

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bar chart with hold on
Hi, x = [9,10,11,12,13,14]; x1 = [1,2,3,4,5,6]; y = [2,4,5,6,7,8]; y1 = [3,2,4,5,6,9]; h = bar([x x1],[y y1]);...

8年弱前 | 0

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Plotting the left and right side of a tricky equation?
Hi, this works also on R2018a: <</matlabcentral/answers/uploaded_files/125793/fplot_test.PNG>> Try the following: ...

8年弱前 | 0

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