How to insert function in matlab

Question

Rachel Barbera 2018-1-22

回答： Star Strider 2018-1-22

How can I insert these functions in matlab?

f1= 3 cos (x+2theta) f2= 3 exp(-3x/pi)

x vary from 0 to 2pi

Answer 1

Star Strider 2018-1-22

If you want to evaluate them as statements:

theta = pi/2;                           % Choose A Value
x = linspace(0, 2*pi, 50);
f1 = 3*cos(x+2*theta)
f2 = 3*exp(-3*x/pi)

If you want to define them as functions themselves, define them as Anonymous Functions (link) as:

f1 = @(x,theta) 3*cos(x+2*theta)
f2 = @(x) 3*exp(-3*x/pi)

then call them as you would any other function.

For ‘f1’, the easiest way to evaluate it with multiple (vector) values for ‘x’ and ‘theta’ is to use the results of the meshgrid (link) function.