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Paul


Technische Universiteit Eindhoven

Actif depuis 2014

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Bug when using data cursor with subplots having (some) equal X and Y values
Im using R2014b. When i have a figure with multiple subplots and I use the data cursor I get the following bug: If I click on a ...

plus de 8 ans il y a | 2 réponses | 1

2

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Plots for second order control system in the same graph
Two things are wrong. One is the parenthesis before .x which should be on the end. The second is the acos(x) which should be aco...

plus de 10 ans il y a | 0

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How can i write a program; to find ultimate frequency of the transfer function
I guess you want the crossover frequency: [Gm,Pm,Wgm,Wpm] = margin(sys) Wgm is the crossover frequency in rad/s. sys is...

plus de 10 ans il y a | 0

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How to insert Matrix?!
Yes you can do that, why don't you just do test it? You can add \n to put the input on a new line. L=input('Please insert m...

plus de 10 ans il y a | 0

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How to change a parameter during a plot?
x = 0:0.01:2; M = 1; R = 2; LR = 0.25; RL = (0.5 / LR) * R; RR = (0.5 / (1 - LR)) * R; xL = x(x<M); x...

plus de 10 ans il y a | 1

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How to solve a sparse matrix efficiently?
Did you try defining A and b as sparse? So: A=sparse(A); b=sparse(b); x=A\b;

plus de 10 ans il y a | 0

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Logical Indexing problem with vector lengths
P(M>grid(P)) = P+1; should be P(M>grid(P)) = P(M>grid(P))+1; At least I guess that's what you want to do.

plus de 10 ans il y a | 1

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How can I generate a noise with a required sensitivily power ? i.e. -174 dBm
See http://www.mathworks.com/help/comm/ref/awgn.html or http://www.mathworks.com/help/comm/ref/wgn.html

plus de 10 ans il y a | 0

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How can I append multiple elements to the end of a vector?
B=[A(A<6), A(A>=6)] or ind=(A>=6); B=[A(~ind), A(ind)] or if you want to keep the original elements of A and ju...

plus de 10 ans il y a | 0

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Problem Integrating sin(2*x)
The integral is: sin(x)^2 + C but Matlab just doesn't show the constant. How do you get the -1/2? Because if you different...

plus de 10 ans il y a | 0

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transfer function of sqrt of s
This is not possible since it's an invalid transfer function. You should be able to write the tf in terms of s^3, s^2, s etc, wh...

plus de 10 ans il y a | 0

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plot multiple points in multiple colors
col=1:numel(peaks); scatter(freq_s(locs),peaks,[],col) You can specify the size of the circles where [] is. Im not s...

plus de 10 ans il y a | 0

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How do I add initial conditions in dsolve while solving a system of ODEs in matrix form?
S = dsolve(diff(Y) == A*Y + B, Y(0)==[0;0]); see: doc dsolve

plus de 10 ans il y a | 0

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How to introduce a random variable in ode45?
Add rng('shuffle') before calling normrnd.

plus de 10 ans il y a | 0

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Using a vector of indices to add values to a matrix
xs = N(:,1); ys = N(:,2); val = N(:,3); siz = size(P); ind = sub2ind(siz,ys,xs); P(ind) = P(ind)+val.';

plus de 10 ans il y a | 0

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Solving a quartic with matlab
Matlab will solve up to a 3rd order polynomial by default. To get an explicit result you have to specify a max degree, in your c...

plus de 10 ans il y a | 0

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Subtracting two matrices yields a scalar in MATLAB
Are you trying to only substract some of the elements? Else you can simply do: A-B. Also i guess you mean the result is a vecto...

plus de 10 ans il y a | 0

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Please help me find 6 unknown parameter from engineering mechanic
sol=solve(-T1*cos(alfa)+T2*cos(beta)==0, -50+T1*sin(alfa)+T2*sin(beta) ==0,- T2*cos(beta)+T3*cos(gramma) ==0,-100+T2*sin(beta)...

plus de 10 ans il y a | 0

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Not enough input arguments when trying to plot function.
ezplot is for expressions with a symbolic variable. You have a function file with a function in it which returns a value for eve...

plus de 10 ans il y a | 0

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"Not Enough Arguments" Error in ode23 - code is perfect as far as I know...
Put this in an m-file: function kinetics=examquestion1(t,Y) kinetics=zeros(3,1); kinetics(1)=-Y(1)*Y(2)+0.1*Y...

plus de 10 ans il y a | 0

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I continue to receive an error message when I try to use fsolve. Can anyone tell me what I'm doing wrong? (I'm using MATLAB R2012a)
change all x(1), y(1) etc to x1,y1 etc. Also put: x1 = 15600; y1 = 7540; z1 = 20140; x2 = 18760; y2 = 2750; z2 = 186...

plus de 10 ans il y a | 0

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How Can I create a time varying equation in Simulink?
Use a clock block for t. The other operations can be done with add, product, gain and math function block for exp.

plus de 10 ans il y a | 0

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Problem with fill and latex interpreter?
I suggest using this excellent tool for exporting figures: http://www.mathworks.com/matlabcentral/fileexchange/23629-exportfig...

plus de 10 ans il y a | 0

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Clear a persistent variable in a MATLAB Fcn block as serial object
clear fcn

plus de 10 ans il y a | 0

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How can I color the area inside the outers points?
x=rand(5,1); y=rand(5,1); center_x=mean(x); center_y=mean(y); [th,rho] = cart2pol(x-center_x,y-center_y); ...

plus de 10 ans il y a | 1

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How extract value form an array?
matrix(ind) Since ind contains two indices in this case, you can do: matrix(ind(1)) to find the value corresponding...

plus de 10 ans il y a | 0

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Gauss Seidel method in matlab to find the roots
First of all 0,01 should be 0.01. Secondly, i=1; should be outside the while loop, else the value of i is reset every loop. I al...

plus de 10 ans il y a | 0

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Help with 'find' function
[val,ind]=min(abs(X-A)) Where val is the distance and ind the index .

plus de 10 ans il y a | 1

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lsline shifts the yaxis upwards
add: axis([-3 6 -3 6],'square') after your plot command.

presque 11 ans il y a | 0

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Solve 2nd order ODE with discrete time terms
Assuming some values for the constants, t1 is your t = DATA(:,1) and e1 is your e = DATA(:,2): function dx = myFUN(t,x) ...

presque 11 ans il y a | 0

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