Create a function and plot it

Question

pauldjn 2019-6-6

回答： Akira Agata 2019-6-6

Hello I have the following function:

f(x) = 1 + a/ 2.5 + x

a= some value

I would like to plot that function. I try to do it with a loop but it takes a lot of time when my x interval is too large.

for x = 1:1000
    a= 500
    fx = 1 + (a/ (2.5 + x));
    plot(x,fx,'-*', 'color','blue');
    hold on;    
end

Is there other way to plot the function maybe defining it with the matlab function command?

Answer 1

Akira Agata 2019-6-6

There are two ways to do this.

[Solution 1]

a = 500;
x = 1:1000;
fx = 1 + (a ./ (2.5 + x));
figure
plot(x,fx)

[Solution 2]

a = 500;
fx = @(x) 1 + (a ./ (2.5 + x));
figure
fplot(fx,[1 1000])