# why im not able plot graph in 1 sec window of 16 sample

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germanbrain common on 25 Aug 2019
Commented: Image Analyst on 27 Aug 2019
clc;clear all; close all;
A=1;
x=0:0.1:1;
sample=16;
y=A*sin((2*pi./sample)*x)
figure
plot(x,y)
dpb on 25 Aug 2019
x=linspace(0,1,16);
y=A*sin(2*pi*x);
plot(x,y)
germanbrain common on 27 Aug 2019
thnak you

Image Analyst on 25 Aug 2019
You didn't have anough points to see the sine wave so all you see is a traingle wave. Increase the number of points and use linspace():
numPoints = 50; % Whatever
Amplitude = 1;
t = linspace(0, 1, numPoints);
period = 0.4; % Seconds -- whatever you want;
y = Amplitude * sin((2*pi./period) * t)
plot(t, y, 'bo-', 'LineWidth', 2, 'MarkerSize', 9)
grid on;
xlabel('Time', 'FontSize', 13);
ylabel('Y', 'FontSize', 13);
title('Sine Wave', 'FontSize', 13);
##### 3 CommentsShow 1 older commentHide 1 older comment
KALYAN ACHARJYA on 27 Aug 2019
Change the period value, and see the results.
Image Analyst on 27 Aug 2019
fs (omega) is (2*pi/period). For a 1 second, 1Hz chunk of signal, you'll have one wave of the sine wave. You can pick whatever sampling rate you want. Of course the higher it is, the more accurately you'll draw the signal.