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Paul


Technische Universiteit Eindhoven

Aktiv seit 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 ...

fast 9 Jahre vor | 2 Antworten | 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...

fast 11 Jahre vor | 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...

fast 11 Jahre vor | 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...

fast 11 Jahre vor | 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...

fast 11 Jahre vor | 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;

fast 11 Jahre vor | 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.

fast 11 Jahre vor | 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

fast 11 Jahre vor | 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...

fast 11 Jahre vor | 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...

fast 11 Jahre vor | 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...

fast 11 Jahre vor | 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...

fast 11 Jahre vor | 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

fast 11 Jahre vor | 0

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

fast 11 Jahre vor | 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.';

fast 11 Jahre vor | 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...

fast 11 Jahre vor | 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...

fast 11 Jahre vor | 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)...

fast 11 Jahre vor | 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...

fast 11 Jahre vor | 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...

fast 11 Jahre vor | 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...

fast 11 Jahre vor | 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.

fast 11 Jahre vor | 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...

fast 11 Jahre vor | 0

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

fast 11 Jahre vor | 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); ...

fast 11 Jahre vor | 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...

fast 11 Jahre vor | 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...

fast 11 Jahre vor | 0

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

fast 11 Jahre vor | 1

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

fast 11 Jahre vor | 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) ...

fast 11 Jahre vor | 0

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