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Paul


Technische Universiteit Eindhoven

Active since 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 ...

ongeveer 8 jaar ago | 2 answers | 1

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answers

Answered
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...

ongeveer 10 jaar ago | 0

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Answered
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...

ongeveer 10 jaar ago | 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...

ongeveer 10 jaar ago | 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...

ongeveer 10 jaar ago | 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;

ongeveer 10 jaar ago | 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.

ongeveer 10 jaar ago | 1

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Answered
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

ongeveer 10 jaar ago | 0

Answered
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...

ongeveer 10 jaar ago | 0

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Answered
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...

ongeveer 10 jaar ago | 0

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Answered
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...

ongeveer 10 jaar ago | 0

Answered
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...

ongeveer 10 jaar ago | 0

Answered
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

ongeveer 10 jaar ago | 0

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

ongeveer 10 jaar ago | 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.';

ongeveer 10 jaar ago | 0

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Answered
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...

ongeveer 10 jaar ago | 0

Answered
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...

ongeveer 10 jaar ago | 0

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Answered
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)...

ongeveer 10 jaar ago | 0

Answered
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...

ongeveer 10 jaar ago | 0

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Answered
"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...

ongeveer 10 jaar ago | 0

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Answered
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...

ongeveer 10 jaar ago | 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.

ongeveer 10 jaar ago | 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...

ongeveer 10 jaar ago | 0

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

ongeveer 10 jaar ago | 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); ...

ongeveer 10 jaar ago | 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...

ongeveer 10 jaar ago | 0

Answered
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...

ongeveer 10 jaar ago | 0

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

ongeveer 10 jaar ago | 1

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

ongeveer 10 jaar ago | 0

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Answered
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) ...

ongeveer 10 jaar ago | 0

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