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Question
Extracting coefficients from symbolic expression
syms P121 P131 P151 P122 P132 P152 cosd sind cosdphi12over2 cosdphi13over2 cosdphi15over2 sindphi12over2 sindphi13over2 sindphi1...
environ 2 mois il y a | 3 réponses | 0
3
réponsesQuestion
Symbolic calculation with solve command
I want MATLAB to express k1 k2 and k3 in terms of r through the following code but I can't get any useful result. The equations ...
7 mois il y a | 2 réponses | 0
2
réponsesQuestion
zero(s) of a nonlinear implicit function
I want to find the roots of an implicit function whose dependant variable is impossible to isolate. In particular, I want to fin...
9 mois il y a | 1 réponse | 0
1
réponseQuestion
Displaying non existant array elements
Why am I getting repeating numbers for the array x as an output for the following piece of script? x=1:0.5:5; for i=1:length(x...
10 mois il y a | 1 réponse | 0
1
réponseQuestion
Euler's identity with angle in degrees
How can I get MATLAB to accept a in degress in exp(aj) to return a complex number where j^2=-1? By default the software takes a ...
plus de 2 ans il y a | 3 réponses | 0
3
réponsesQuestion
Adaptive step size solver for an ODE
This question involves both mathematics and MATLAB. I am trying solve an ordinary differential equation numerically, dy/dt=10*ex...
presque 3 ans il y a | 1 réponse | 1
1
réponseQuestion
integral command with function handle
Why do I get an error message with the following piece of script? Everything seems OK (I use R2014a by the way) func=@(x) exp(...
environ 3 ans il y a | 1 réponse | 0
1
réponseQuestion
fprintf with complex numbers and ordinary arrays
%Enter coefficients in a descending order N=input('Enter the degree of the main polynomial '); for k=1:N+1 Pol1(k)=input(...
environ 3 ans il y a | 1 réponse | 0
1
réponseQuestion
Printing cell array elements
Below script is an application of Newton's method to solve a set of nonlinear equations. Here we have 3 equations in 3 unknowns....
environ 3 ans il y a | 1 réponse | 0
1
réponseQuestion
Referring to an element within a cell array element
x{1}=[1;2;3]; for i=1:4 x{i+1}=x{i}+5; end The above small script generates a 1x5 cell array. Every element of x is a 3x1 ar...
environ 3 ans il y a | 1 réponse | 0
1
réponseQuestion
Using frprintf to display arrays having a string element
The script.. taylor(1)=-0.4;taylor(2)=-0.3786666667; epsilon=0.5*10^(-6); i=1; while abs ((taylor(i+1)-taylor(i))/taylor(i+1))...
environ 3 ans il y a | 1 réponse | 0
0
réponseQuestion
Plotting a piecewise function
I have a function m-file, goes like this: function y=periodic(x); if x<=1 y=0; end if x > 1 & x < 2 y=x-1; en...
plus de 4 ans il y a | 1 réponse | 0
1
réponseQuestion
Creating a piecewise function
I am trying to make that triangular wave for one period with the code (I don't want to plot it, just to generate x and y values ...
plus de 4 ans il y a | 2 réponses | 0
2
réponsesQuestion
Hilbert Matrix in least squares polynomial regression
When approximating the polynomial x^2+3x+2 with a least squares polynomial of degree two in [0 1], the coefficient matrix of the...
plus de 4 ans il y a | 1 réponse | 0
1
réponseQuestion
A complex number in the course of Müller's method
Consider the script below. I am trying to find the roots of by using Müller's method with initial estimations N=input('Enter t...
presque 5 ans il y a | 1 réponse | 0
