To plot two functions but it shows unrecognized variable.

Hi everyone, I have a doubt, kindly please help me with it.

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.

THANK YOU IN ADVANCE.

Answer 1

[Image Analyst]

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.

[VIDHYA HARINI]

So, how do I find the area between those two curves?

[VIDHYA HARINI]

And may I know why did you use this? Is that mandatory?

x = linspace(-1.5, 1.2, 1000);

[Torsten]

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.