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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 ...

mer än 8 år ago | 2 answers | 1

2

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...

mer än 10 år 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...

mer än 10 år 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...

mer än 10 år 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...

mer än 10 år ago | 1

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Answered
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;

mer än 10 år ago | 0

Answered
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.

mer än 10 år 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

mer än 10 år 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...

mer än 10 år 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...

mer än 10 år 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...

mer än 10 år 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...

mer än 10 år ago | 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

mer än 10 år ago | 0

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

mer än 10 år 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.';

mer än 10 år 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...

mer än 10 år 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...

mer än 10 år 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)...

mer än 10 år 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...

mer än 10 år 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...

mer än 10 år 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...

mer än 10 år 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.

mer än 10 år 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...

mer än 10 år ago | 0

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

mer än 10 år 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); ...

mer än 10 år ago | 1

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Answered
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...

mer än 10 år 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...

mer än 10 år ago | 0

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

mer än 10 år ago | 1

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

mer än 10 år 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) ...

mer än 10 år ago | 0

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