sine wave in matlab

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Discussion in 'Programmer's Corner' started by Ron Potashnik, Mar 21, 2016.

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Mar 21, 2016 #1

Ron Potashnik Thread Starter New Member

Dec 27, 2015

16

0

hello.
i wrote this code in matlab

t=[0:0.2e-3:3e-3];
f=2*pi;
v=sin(f*t*1000);
plot(t,v)

and my sine plot is looking like this

why dosent it look like a normal sine wave

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Mar 21, 2016 #2

WBahn Moderator

Mar 31, 2012

22,752

6,777

How many samples are you generating each cycle?

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Mar 21, 2016 #3

Ron Potashnik Thread Starter New Member

Dec 27, 2015

16

0

WBahn said: ↑

How many samples are you generating each cycle?
Click to expand...

i fix my problem with more samples. tnx

#3 Like Reply
Mar 21, 2016 #4

WBahn Moderator

Mar 31, 2012

22,752

6,777

Good.

A good rule of thumb is that you need at least about ten samples per cycle for it to look halfway decent for humans -- more is better. But, from a sampling theorem and information theory standpoint you can get by with less.

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