How to solve 2nd order differential equations while variables are coupled?
Try the following code: syms w U1r(x) U1i(x) U2i(x) U2r(x) L m d eq1=(w-1)*U1r-diff(U1i)+L*U2r-m*diff(U1r,2)==0; eq2=(w+1)*U...

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Matlab equivalent of in from python
exist command will do. Check its usage: https://www.mathworks.com/help/matlab/ref/exist.html

mer än 2 år ago | 0

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Flipped numbers (number pyramid)
n=4; for i=1:n A(i)=str2double(string(sprintf('%d',1:i))); end disp(A)

mer än 2 år ago | 0

anyone can solve code y” + y’ =0 to find general solution
syms y(t) eq=diff(y,2)+diff(y)==0; y(t)=dsolve(eq)

mer än 2 år ago | 0

asymptotic magnitude bode plot of fractional order transfer function
The following code should give you what you want: hold off; alpha=0.9;Wcr=2; w1=logspace(-1,log10(Wcr),1000);w2=logspace(log1...

mer än 2 år ago | 0

Filtering Columns by Contents of Rows
n=2; A(:,(sum(~isnan(A),2)<n).')=[]

mer än 2 år ago | 0

the function of \n
newline For instance: chr = 'Whose woods these are I think I know.'; chr = [chr newline 'His house is in the village though']...

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convert simulink file from 2017a to 2016a
Find it attached.

mer än 2 år ago | 0

How do I give order or number for "a" with ijk in the following code ? Please help me
What you are trying to do is not recommended in MATLAB since dynamically creating variables is not useful. You have several othe...

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If i try to write derivative of f in the below code(i pointed here), it doesn't work. why?
You do not have to use Symbolic approach this time. Try the following code: hold off; x1=2.5; f=@(x) x.*sqrt(x)+2*x.^3+1.5; %...

mer än 2 år ago | 0

Vectorize for loop with recursion
P1(P4>0)=x; P2(P4<0)=x; P3=P1+P2; P4(2:end)=P3+P4(1:end-1);

mer än 2 år ago | 0

How to create a clickable timeline using app designer, with play/pause button?
If I understood it correctly, you want to dynamically change the time limits of an axes property. The attached app may be a star...

mer än 2 år ago | 0

How to replace equations in symbolic function
By using subs function: syms a b x F=3*a*b; Fnew=subs(F,{a,b},{x,1})

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problem with function sinc
Adapt its formula as follows: x = 0:pi/100:2*pi; y=sin(pi*x)./(pi*x);%sinc function plot(y)

mer än 2 år ago | 2

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repeat an element in a vector
[n(1) n] or [repmat(n(1),1) n]

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Plotting from a for loop- discrete maps
function [x] = logistic(lambda,x0,n) x(1) = x0; for i= 1:n x(i+1) = lambda*x(i)*(1-x(i)); z(i,:) = [i,x(i)]; di...

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Aiming to solve function and have one of the variables be a minimum value:
The key point here is to define solx as a function of r. Try the following code: syms r x a = 100; Cp = .70; b = .50206; c ...

mer än 2 år ago | 0

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How to create this fucntion below
You can try the Symbolic approach: syms y(t) y(t)=piecewise(t<-1,0,t>=-1 & t<0,2,t>=0 & t<=1,-2,t>1,0); %plotting t=-5:0.001...

mer än 2 år ago | 0

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Can I input an m file into a simulink model as a function block? If so, how?
Use MATLAB Function block.

mer än 2 år ago | 1

Force Simulink Embedded Coder to do a simple cast when converting float to uint16?
Why don't you use a MATLAB Function block and write this line inside it? For example: y=uint16(x); This line should go inside ...

mer än 2 år ago | 0

Solved

Alternating sum
Given vector x, calculate the alternating sum y = x(1) - x(2) + x(3) - x(4) + ...

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Create a vector
Create a vector from 0 to n by intervals of 2.

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Number of 1s in a binary string
Find the number of 1s in the given binary string. Example. If the input string is '1100101', the output is 4. If the input stri...

mer än 2 år ago

plotting Intensity function which consists of an exponential sum
Try this: L=100; N=20; d=1; k=10; Ar=1; A=0.1; theta=linspace(-pi/2,pi/2,200); epsilon=rand; phase=(d+A*epsilon)*sin(theta)...

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Bottles of beer
Given an input number representing the number of bottles of beer on the wall, output how many are left if you take one down and ...

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Balanced number
Given a positive integer find whether it is a balanced number. For a balanced number the sum of first half of digits is equal to...

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Return the first and last character of a string
Return the first and last character of a string, concatenated together. If there is only one character in the string, the functi...

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Getting the indices from a vector
This is a basic MATLAB operation. It is for instructional purposes. --- You may already know how to <http://www.mathworks....

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Generate a vector like 1,2,2,3,3,3,4,4,4,4
Generate a vector like 1,2,2,3,3,3,4,4,4,4 So if n = 3, then return [1 2 2 3 3 3] And if n = 5, then return [1 2 2...

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Distance walked 1D
Suppose you go from position 7 to 10 to 6 to 4. Then you have walked 9 units of distance, since 7 to 10 is 3 units, 10 to 6 is 4...

mer än 2 år ago