Plotting a function over an interval

Hi,

I'm dealing with defining a function and then plotting it. The function is y1= arctan(exp(x)*(x-1))+ pi/2 which I need to plot it over interval x=0:0.1:2 , but every time I get an error. What do I need to do?

I did this:

x = 0:.01:2;

y1= arctan(exp(x)*(x-1))+ pi/2

plot(x,y1)

Also, if I want to have several functions plotted in a same window but with different colors, what should I do?

Answer 1

[the cyclist]

You need to use ".*" instead of "*" to multiply each element of the vector, and also the inverse tangent function in MATLAB is atan() not arctan():

 >> y1= atan(exp(x).*(x-1))+ pi/2

Answer 2

[Kris Hoffman]

Tought I'd add to this answer.

y1 = @(x) atan(exp(x).*(x-1))+ pi/2
fplot(y1,[0,2])

[Fernando Baltazar]

This worked for me thanks!

Answer 3

[Fangjun Jiang]

You mean this?

x = 0:.01:2;
y1= atan(exp(x).*(x-1))+ pi/2;
plot(x,y1);

help plot for details.

plot(x1,y1,'r',x2,y2,'g',x3,y3,'b')