CODEWITHSUNDEEP
matlab
kenyami
kenyami

Reputation: 59

How to increase the number of plotted cycles

I've plotted a sin wave that takes one second to complete an oscillation and has an amplitude of one.

F = 1 ;
A = 1 ;
x = linspace (0,1,100) ;
y = A * sin(2 * pi * F * x) ;
plot(x, y, 'b.-'),xlim([0 3.5]),ylim([-1 1]);

The problem is, only one oscillation is plotted on the graph. How can I get more cycles or oscillations to be plotted?

Upvotes: 1

Views: 46

Answers (1)

Tommaso Belluzzo
Tommaso Belluzzo

Reputation: 23675

Your linspace output was defined between 0 and 1. If you want to fill the whole plot, whose x upper limit is 3.5, change the code as follows:

F = 1;
A = 1;
x = linspace (0,3.5,100); % from 0 to 3.5, not from 0 to 1
y = A * sin(2 * pi * F * x);
plot(x, y, 'b.-'),xlim([0 3.5]),ylim([-1 1]);

If you want to have more control over this, just define a variable which represent your x-axis upper limit so you don't have to change too many things when you want to modify the plot:

F = 1;
A = 1;
x_hi = 3.5;
x = linspace (0,x_hi,100);
y = A * sin(2 * pi * F * x);

plot(x, y, 'b.-');
xlim([0 x_hi]);
ylim([-1 1]);

Upvotes: 3

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