How do you show the negative x values on the graph?

x = linspace(0,7.999999999,8)
y = exp(-x) + exp(-2*x)
y1 = (exp(x)/6 + exp(-x) + exp(-2*x))
scatter(x,y,'r','filled')
hold on
plot(x,y1,'b')
title('Question 2')
legend('homogeneous','inhomogeneous')

[Derek Paul]

x = linspace(0,7.999999999,8)

y = exp(-x) + exp(-2*x)

y1 = (exp(x)/6 + exp(-x) + exp(-2*x))

scatter(x,y,'r','filled')

hold on

plot(x,y1,'b')

title('Question 2')

legend('homogeneous','inhomogeneous')

Answer 1

[Star Strider]

Since you defined ‘x’ as:

x = linspace(0,7.999999999,8);

you do not have any negative x-values to plot. If you want to extend the x-axis to go from -1 to +8 for example, somewhere after your scatter and plot calls, add this line:

set(gca, 'XLim',[-1  8])

[Derek Paul]

Ok thank you

[Star Strider]

My pleasure.