shahin hashemi
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Accept 20 answers given by other contributors
Awarded to shahin hashemi on 09 Jun 2020
Feeds
Frage
integral (numerical integration) base on r
dear all i want to use integral (numerical integration) base on r for W for the code below : clc clear all m=9; a=1; ...
mehr als 3 Jahre vor | 1 Antwort | 0
1
AntwortFrage
I have problem with simplifing my equation
Dear all i have cod like below : clc clear all a=1; m=9; u=[3.8317 7.0156 10.1735 13.3237 16.4706 19.6159 22.7601 ...
mehr als 3 Jahre vor | 1 Antwort | 0
1
AntwortFrage
bessel function derivatives problem
dear all i have following equation that contain bessel function : 1- u(r)=j1(r) [1 mean the order and r is Vari...
mehr als 3 Jahre vor | 1 Antwort | 0
1
AntwortFrage
finding frequency and domain of equation using ode45
dear all i use following code to find answer of the following equation : u ̈+u+u^3=0 function dydt= vdp1(t,u) dydt=[u(2);-u...
fast 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
finding frequency and domain of equation using ode45
dear all i use following code to find answer of the following equation : u ̈+u+u^3=0 function dydt= vdp1(t,u) dydt=[u(2);...
etwa 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Input function must return 'double' or 'single' values. Found 'sym'.
dear all when i using integral command although i define z i get the following error clc clear all E2=10; E1=20; lE=E2...
etwa 4 Jahre vor | 1 Antwort | 1
1
AntwortFrage
i confuse using syms variable
dear all i run the following code : clc clear all N=6; % number of disks L=0.08; % the length of each segment x = sym('...
mehr als 5 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Subscript indices must either be real positive integers or logicals.
dear all i have code like below clc clear all for b=1:0.1:20 M((b*10)-9,:)=[1 1 1 ] end but at b=2.4 i got this er...
mehr als 5 Jahre vor | 1 Antwort | 0
1
AntwortFrage
predicting the trends of diagram
dear all i have 2 data point like this that come from nonlinear equations : x=[13 8 6 5.5 5 4.9 4.8 4.795 4.792 4.791 4...
fast 6 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
call large equation to ode solver
dear all i want solve equation with using ode113 clc clear all tic initialcond=[-0.001,-0.001,-0.001,-0.001,-0....
fast 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
problem with taking Differentiate from variable with counter !
dear all i need to write a code that have x symbolic variable that contain x=[x1 x2 x3 .... xn] and also x is depended to v...
fast 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
problem with taking Differentiate from variable with counter !
dear all i need to write a code that have x symbolic variable that contain x=[x1 x2 x3 .... xn] and also x is depended to v...
fast 6 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
how can i draw circle in 3D space with 3 point ?
Dear all I need to draw a circle in space with 3 points that I have. For example in the picture below I need to through t...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
how can i fit smooth curve through these points ?
dear all i have data point like below and i want to fit smooth curve (interpolate) through these point x=0,0.0521848...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
how can i substitute number with symbol ?
dear all i have code like below : clc clear all N=4; L=60e-3; M=3.338e-3; jx=5.743e-14; E=2.1e11; ...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
why matlab Make a mistake in calculating sin and cos while teta in wiling to zero ?
dear all as it is obvious base on the Taylor series or l'hopital's rule , answer the below equation is 1/2 Taylor series ...
etwa 6 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
curve fitting : Error computing Delaunay triangulation. Please try again with different data.
dear all i have data point like below : s = 0 0.0200 0.0400 0.0600 0.0800 y = 0 ...
mehr als 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
curve fitting : Error computing Delaunay triangulation. Please try again with different data.
dear all i have data point like below : s = 0 0.0200 0.0400 0.0600 0.0800 y = 0 0 ...
mehr als 6 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
Subscripted assignment dimension mismatch when cal back the function
dear all this is my cod function [Rl] = basisfunction1(j,N) L=1; x = sym('x', [1 3]...
mehr als 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
fsolve problem with syms var
dear all i write cod that i want to solve it with fsolve commend at the end, my equations just contain double parameters ...
mehr als 6 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
Index exceeds matrix dimensions in very simple equation
x = sym('x', [1 3*N], 'real'); N=4; L=1; for i=2:N+1 pl(:,:,i)=L*[(cos(x(3*i-2))*(1-cos(x(3*i-1))))/x(3*i-1) (sin(...
mehr als 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
FSOLVE requires all values returned by functions to be of data type double.
dear all i write code like below that produce 9*1 matrix that have 9 sym variable x1,x2,.........,x9 i m using fsolve to calc...
mehr als 6 Jahre vor | 3 Antworten | 0
3
AntwortenFrage
Subscripted assignment dimension mismatch when using coeffs command
dear all i have code like below: clc clear all syms q(i) teta(i) eb(i) tetad = sym('tetad', [1 2], 'real'); ...
mehr als 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
rewrite A=[3*1] matrix to [3*3]*[3*1(var)]=A
dear all i have 3*1 matrix like matrix E below syms qd td ed q teta E =[ ed*cos(q)*sin(teta) - cos(teta)*(qd*cos...
mehr als 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
how can i rewrite an equation base on variables
dear all i have 3*1 matrix like matrix E below syms qd td ed q teta E =[ ed*cos(q)*sin(teta) - cos(teta)*(qd*cos...
mehr als 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
fsolve with 3 variable name
dear all i have 9 equations like below that equal to zero i put them in matrix called F=[F(1);F(2);F(3);F(4);......;F(9)] ...
mehr als 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
i cant understand why matlab assumpt that my variables have image part
dear all i run the following code : syms be(i) ga(i) eb(i) for i=2:8 k(i)=sqrt(((be(i))^2)+((ga(i))^2)); q(i)=atan2(...
mehr als 6 Jahre vor | 1 Antwort | 0
1
Antwort
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