# how to write in my x line pi instead of the actual number ?

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hello I have 2 question .

1)first what is the diffrnce between the opretion * and .* ? as i undestand it the diffrnce is that you use * when multiplaying scalras and using .* when multiplaying vectors , am i right ?

2) the second question is that I wrote this code :

my question is how can I display my x line as function of pi (meaning 1pi ,2pi,3pi,4pi and so on ) ?

clc;clear all;close all

x=0:0.01:(6*pi)

beta=pi/7

alpha=pi/5

y_1=sin(x*alpha).*cos(x*beta)

y_2=cos(x*alpha).*sin(x*beta)

y_3=y_1+y_2

y_4=sin(x*alpha+x*beta)

figure(1)

plot(y_3)

figure(2)

plot(y_4)

##### 0 Comments

### Accepted Answer

madhan ravi
on 10 Mar 2019

* for matrix mulitplication

doc mtimes

.* for element wise multiplication

doc times

xlim([0 6*pi])

xticks(0:pi:6*pi)

xticklabels((""+(0:6))+"\pi")

##### 1 Comment

madhan ravi
on 10 Mar 2019

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