PetronasAMG
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Engineering student who needs a lot of help with matlab!
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Awarded to PetronasAMG on 16 Feb 2018
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Generating random angles between interval
How would I generate three random angles between (-pi to pi)? ex) q= [theta1 theta2 theta3], all theta are random numbers betwe...
mehr als ein Jahr vor | 1 Antwort | 0
1
AntwortFrage
Interpolation of missing matrix element
Hello, I am trying to interpolate some missing data of my 3x3 matrix, M = [43.13 0 42.88;0 39.32 0;41.81 0 43.27]; where 0s re...
mehr als ein Jahr vor | 2 Antworten | 0
2
AntwortenFrage
How to use spline interpolation to find intersection point of two lines.
Hi, Just new to matlab and still trying to understand spline interpolation. Although we can eye ball the interspection point, ho...
mehr als 2 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
Integrating a 2nd order ODE
I am given an equation, d^2y/dx^2 + q(x) = 0 x ranges from 0 to 1 and y(0) = 1 and y(L) = 1.5 where L = 1 and q(x) = 2*cos...
mehr als 2 Jahre vor | 1 Antwort | 0
1
AntwortFrage
how to linear interpolate using a for loop
say I have a y = x^2 -2; I want to find out which point of x it crosses y = 0 by linear interpolating. But by showing when the ...
mehr als 2 Jahre vor | 1 Antwort | 0
1
AntwortFrage
how to get eigenvalues and plot it
say time is varying from 1< t < 10 I also set the element of matrix a1 = t/1, a2 = t +2 / 3 ,a3 = t/2 ,a4 = t+5 then i set u...
mehr als 2 Jahre vor | 1 Antwort | 0
1
AntwortFrage
error getting eigenvalues varying with time
xcg = 0.15; rea = 0.5; xe = 0.35; cla=2*pi ; m= 5*pi; a0 = 0; wr = (1/2); mu = 1+(3*a0^2); U = 0:0.01:1; a1 = ((mu*((U.*c...
mehr als 2 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Eigenvalue and Eigenvector extracting
so I have a time array say, 0< t < 10 My elements of matrix are function that will depend on variable t. Say, a11 = (t^2)/2 ,a...
mehr als 2 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to get eigenvalues with varying coefficient
I have t varing from 0 < t < 5 and x1 = (1+t)/2, x2 = (t^2)/4 and x4 = (1+2t)/6 so i did linspace(0,5,5) A = [x1 x2; 0 x4]; ...
mehr als 2 Jahre vor | 1 Antwort | 0
1
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how to interpolate the data over uniform time grid
Since numerical solution obtained from ode45 is a non uniform in time, I need to obtain the frequency power spectrim of the solu...
mehr als 2 Jahre vor | 0 Antworten | 0
0
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How to create a Frequency Spectrum plot from nonlinear equations
given three nonlinear equations dx1/dt = 3(x1+x2) dx2/dt = x1 - (1/6)x2 dx3/dt = (1/7) + (x1 -3.25)*x3 and their correspodin...
mehr als 2 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
How to computer a frequency spectrum and find its largest spectral energy
I am given set of equation I am suppose to plot x1 x2 and x3 as a 3d dimensional phase, but direction wants me to omit any pos...
mehr als 2 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Using ODE45 for first order diff equation with three different variables
So, I am trying to use ODE45, say dx/dt = (0.1*x)+(0.25*y)-(9.8*z) I am trying to graph the behavior of x,y and z from time (0...
mehr als 2 Jahre vor | 1 Antwort | 0
1
AntwortFrage
pulling our elements from a matrix using for loop
if matrix A = [1 3 4 2 17 6 4 5 2] what is a matrix command that i can use it to pull first 6 elements?
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
comparing cells in excel then calculate for the sum
So I will try my best to explain this. So I need to find the sum of weight given chart, <</matlabcentral/answers/uploaded_f...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
while loop error with conditional statment
i %ignore this i code starts from below interval = 1.2 x_int = 0:intereval:c i=1 while x_int(i) <= c ya(i) = ((5...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
different dimension matrix addition
for example, A = [1 2 3 4 5] B = [0 0 0 0 0 6 7 8 9 10] and i need C = [1 2 3 4 5 6 7 8 9 10] is there a way to make...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Conversion to logical from sym is not possible.
This is what I have syms x; ...
etwa 6 Jahre vor | 1 Antwort | 0
1
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stuck on graph format! please help
so this is what I have.. <</matlabcentral/answers/uploaded_files/103530/Capture1.PNG>> but i need to make my graph look li...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
graph comes out all rotated
so this is what i have posdegreeline = refline(tand(-45),0); negdegreeline = refline(tand(45),0); posdefreeline.Color...
etwa 6 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
unheard of ptitle command.. what is this???
so i am pulling out data from excel files as my input and export all my calculated data from matlab to excel output. So far ever...
etwa 6 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
index exceeds matrix demension
figure(1) hold on; plot(1.25,1.25,'ro'); i=1; while i <= 20 plot([xi(i),xj(i)],[yi(i),yj(i)],'b'); ...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
how to shift origin or graph without changing the data value.
Let's say you have a (x,y) = (1,1) however is there a possible way to show another quadrant of the graph? Every time i try to se...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Distance formula using while loop
so i given a data file, I was able to call in these values into Matlab input <</matlabcentral/answers/uploaded_files/103383/S...
etwa 6 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
How to rescale x- axis?
so when i plot my function, i get a wide graph. <</matlabcentral/answers/uploaded_files/101612/Screen%20Shot%202018-01-17%20a...
mehr als 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Data must be a single matrix Y or a list of pairs X,Y. Need help on plotting 3D graph!
array= Tmax/n; %This expends the data points n = 2000 and Tmax = 20 t = 0:array:Tmax; ...
mehr als 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
corrected trapezoid rule function code
I need help on matlab coding!! so assignment given is to use trapezoid rule, midpoint rule and corrected trapezoid rule to pl...
mehr als 6 Jahre vor | 0 Antworten | 0
0
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