Aquatris
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Contribute at least one answer each month for 12 consecutive months
Awarded to Aquatris on 04 May 2019
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Feeds
how to store data for second looping
One way would be to use a 3D array for dataA variable or; for z=1:1000 for i=1:20 x(i)=rand; y(i)=2*x(i)...
más de 4 años hace | 0
| aceptada
How to plot every column of matrix into a different graphic but in one figure
This might be what you are looking for A = rand(13,4); % random 13x4 matrix [r,c] = size(A); % get number of rows and columns ...
más de 4 años hace | 1
plot 2 different y-values for the same x-value in box plot
You are looking for the "bar" function. If you also need the error bars, check out this answer from a previously asked question....
más de 4 años hace | 0
plotting an array skipping some columns
If you know which columns you want; desiredColumnIndex = [1 23 35 67 70 83]; plot(x,T(:,desiredColumnIndex)) If you want ever...
más de 4 años hace | 1
| aceptada
Code for FFT analysis
You should check the FFT function site. Everything you need is there. Here is the link.
más de 4 años hace | 0
How can I index elements by their sorted positions?
Sort has a second output that is the index; [B,I] = sort(A); such that A(I) = B; From there, I is the C_ matrix you are looki...
más de 4 años hace | 0
| aceptada
Processing EMG data in MATLAB?
I think you are looking for the function cumtrapz, here is the link.
más de 4 años hace | 0
| aceptada
How do I get the transfer functions in a MIMO transfer matrix in Matlab
Once you obtain the system model G, you can call any input-output pairs as you like as if you are dealing with matrices. outpu...
más de 4 años hace | 0
| aceptada
Plot all four functions
It only plots the first one because your Zeta is always 1 (c/cc = 1). Moreover, even if you changed Zeta to be other values, it ...
más de 4 años hace | 1
| aceptada
Plotting a 2 dimensional graph
What you are looking for is the "countour" function (or countourf) of Matlab. Check this link and you can adapty your equation t...
casi 5 años hace | 0
Frequency based weighting in Simulink
One approach can be to fit a model to that table. For example; f = [0.1 0.125 0.16 0.2 0.25 0.315 0.4 0.5]; m = [62.4 97.2 1...
casi 5 años hace | 0
| aceptada
how to calculate the value of theta_k in terms of theta_i and theta_j
If you have symbolic toolbox, you can use something like this; syms a b c real % define a b c as real symbolic variables eq = ...
casi 5 años hace | 0
Open Loop Time Response ?
Define your transfer function first. Then define your time vector. I have no idea what you want for input but I will use a nice ...
casi 5 años hace | 0
How can I put a display that shows changing variables in a plot?
Assuming you plot in a for loop and the changing variable is x, below code will update the title of the plot to be equal to x f...
casi 5 años hace | 0
How can i verify time step of excel files?
After you load the file in to matlab workspace, name the variable for time. Then you can use diff() function to find the differe...
casi 5 años hace | 0
| aceptada
Plot a discrete signal
Here is one way; n = -5:0.1:5; index = [find(n==-3) find(n==-1) find(n==1) find(n==3)]; x = zeros(length(n),1); x(index) = 1...
alrededor de 5 años hace | 0
How to set different intervals using linspace()?
If you want to remove a certain element; x = linspace(1,100,1e3); % 1000 elements i = 100; % index to be remov...
más de 5 años hace | 0
| aceptada
error in subcript must real integers or logicals
If you run this portion ((idemod-1)*length(tmod)+1:idemod*length(tmod)).*cos(2*pi*fc*tmod) which you use as index, you will se...
más de 5 años hace | 0
| aceptada
How to exchange between X and Y axes in a 3D graph?
You can use a code like; h = findobj(gca,'Type','line') x=get(h,'Xdata') y=get(h,'Ydata') z=get(h,'Zdata') This will extrac...
más de 5 años hace | 0
How to Design a Full Order Observer in MATLAB?
place() function is for controller design not related to observers. The function finds a state feedback control law, u = Kx, suc...
más de 5 años hace | 3
any input function to transfer functionm
I think the function you are looking for is lsim(). The usage is pretty simple. t = 0:1e-3:10; % time vector u = rand...
más de 5 años hace | 0
State Space block state vector value
To do that you need to specify your states as outputs by modifying your C matrix. C = [1 2 3 4]; % original C matrix that giv...
casi 6 años hace | 1
how to design a notch filter in matlab
Here is one way; alpha= 2000; % determines the depth f = 650*2*pi;% notch filter frequecy (rad/s) x = 0.1; % no...
casi 6 años hace | 0
modify axis in time series
You are not clear on what you want to do but from what I understand, you want to change the x labels from 0-2-4-6.. to something...
casi 6 años hace | 0
FOR loop calculating next values using the previous values
Your for loop cannot go upto size(Xin,1). Imagine Xin has 10 elements. For calculation of M10, you would need to access Xin(11),...
casi 6 años hace | 0
| aceptada
Plotting contours of Z on an x-y axis where Z is not a function of x or y
You do not have a lot of data so the countour map will not look great. However what you need to do is; % create data x = [0.2 ...
casi 6 años hace | 1
| aceptada
How can i get fourier transform of this function
Here is a one way of doing it; clear;clc A = 2; f = @(t,t1,t2) A.*((t1<t) & (t<t2)); Fs = 1000; t = 0:(1/Fs):...
casi 6 años hace | 0
about why in pole placement gives me error?
It is just the error says. Place command cannot place poles with multiplicity greater than rank(B). In your case, rank(B) is 1. ...
casi 6 años hace | 0
| aceptada
tfestimate gives different results for different Fs
It is because when you change the sampling time, you are basically playing with the fft of the signal. You should use Ts value o...
casi 6 años hace | 0
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