# To plot two functions but it shows unrecognized variable.

6 views (last 30 days)
VIDHYA HARINI on 7 Jan 2023
Edited: Torsten on 7 Jan 2023
This question was flagged by Star Strider
I need to find graphs for f(x) = e^x-1 and g(x) = 1-x^2 and plot them in the same graph and I also need to find their intersections and area between those two curves.
I am new to this matlab, so I am not really sure how to do this. I hope if there is someone who can help me out with this.

Image Analyst on 7 Jan 2023
Here's a start?
x = linspace(-1.5, 1.2, 1000);
f = exp(x)-1 ;
g = 1-x.^2 ;
plot(x, f, 'r-', 'LineWidth', 2);
hold on;
grid on;
plot(x, g, 'b-', 'LineWidth', 2);
xline(0, 'LineWidth', 2)
yline(0, 'LineWidth', 2) To find the intersection, see the links Star referred you to.
Torsten on 7 Jan 2023
Edited: Torsten on 7 Jan 2023
Do you have a better idea on how to fix the interval and the granularity of the plot ?
To make a plot, you have to fix the interval over which the function is to be plotted and the distance of the points within this interval where the function is evaluated.