plot a sinusoidal signal from a file.dat

Hi everyone, I have stored values of a sinusoidal signal in a file.dat, i worked with a Frequency of sampling which is worth 8000hz,now i want to plot my signal from the file.dat in matlab but i don't know how, can you help me please!?

Answer 1

[Star Strider]

I would do it this way:

fidi = fopen('file.dat', 'rt');                             % Open File For Reading Text
Dc = textscan(fidi, '%f', 'CollectOutput',true);            % Change ‘textscan’ Arguments To Match Your File
D = cell2mat(D);                                            % Create Numeric Array
Fs = 8E+3;                                                  % Sampling Frequency (cycles/time unit)
Ts = 1/Ts;                                                  % Sampling Interval (time unit/cycle)
t = linspace(0, 1, length(D))*Ts;                           % Time Vector (Delete If You Saved Your Time Vector In Your File)

figure(1)
plot(t, D)                                                  % Plot Your Data
grid

Note — This is quite obviously UNTESTED CODE. A version of it should work. You will have to experiment with it with your data.

See the documentation for the various functions to understand how to use them, and how they work.

[Souhir FH]

Thank you very much now i can plot the signal.

[Star Strider]

My pleasure.

Answer 2

[Tamir Suliman]

this how it will work

first you will have to import the dat file to matlab using import command

then assign that to a variable

for example import file.dat

d=file

then use that data and sub in to yoru sin equation

y = sin(d()*t)

whatever your t value is

then plot the signals

[Souhir FH]

I do this, there is not error but the signal isn't sinusoidal, it is continued.