matlab code to convert continuous signal into its discrete form

conversion from continuous to discrete form

[Azzi Abdelmalek]

What do you mean? ploting?

[Jagadeesh Talari]

Code

Answer 1

[Azzi Abdelmalek]

If you want to plot a discrete signal

x=1:10
y=sin(x)
stem(x,y)

[Nishank Gupta]

i dont want to plot but i want to convert the continuous signal into discrete so that i can use the output for further calculation...

[Azzi Abdelmalek]

What do you mean by continuous signal? give an example of a continuous signal. In your computer, both continuous and discrete signals are in a discrete form!

[Nishank Gupta]

i know..all the signals that we process in matlab are somewhat discrete in form..but i want a discrete form of continuous signal(lets say)..In other words, i want a signal as output whose sample difference is 1 unit (integer)

[Azzi Abdelmalek]

You said: "i want a signal as output whose sample difference is 1 unit"

My question is, you want an output from what? Give an example. Or do you want to create a discrete signal?

Answer 2

[Azzi Abdelmalek]

Maybe you want quantizing

% your original signal
t=0:0.1:10
y=2*sin(t)
plot(y,'r')
% Quantizing
q=1 % quantization interval
yd=round(y/q)*q
hold on
plot(yd,'b')

[naadiya khudabux]

hi .. i have the same question i want to do sampling at 50 Hz .how can i do ??

[Walter Roberson]

num = xlsread('HASC24278-acc.csv');
timestamps = num(:,1);
signals = num(:,2:end);
first_time = timestamps(1);
last_time = timestamps(end);
Fs = 50;
period = datenum([0 0 0 0 0 1/Fs]);
probe_times = first_time : period : last_time;
resampled_data = interp1(timestamps, signals, probe_times);

[naadiya khudabux]

    1.3608    1.3608    1.3608    1.3608    1.3608    1.3608    1.3608
  Columns 7367746 through 7367752
    1.3608    1.3608    1.3608    1.3608    1.3608    1.3608    1.3608
  Columns 7367753 through 7367759
    1.3608    1.3608    1.3608    1.3608    1.3608    1.3608    1.3608
  Columns 7367760 through 7367766

its stuck :(.. not working with me .

[Walter Roberson]

num = csvread('HASC24278-acc.csv');
timestamps = datetime( num(:,1), 'convertfrom', 'posixtime');
signals = num(:,2:end);
first_time = timestamps(1);
last_time = timestamps(end);
Fs = 50;
period = seconds(1/Fs);
probe_times = first_time : period : last_time;
resampled_data = interp1(timestamps, signals, probe_times);

However, this will fail because you have duplicate timestamps at line 1222 and 1223:

            1360805282.336 -0.20259 -0.797522 0.41063
            1360805282.336 -0.201619 -0.701036 0.350918

Answer 3

[peter dalton]

i also have a same problem . actually i have a plot of (E,N_E), both are the matrices of of different dimensions, since i am developing a user interface so everytime these dimensions will get change. if i want to plot (dN_E/dE,E), how do i plot this?

[Walter Roberson]

You asked this in http://www.mathworks.com/matlabcentral/answers/284543-how-to-plot-dk-de-e-from-plot-of-k-e