I have to create a poligonal graph and calculate its lenght, and this is the first step: evenly spacing the graph of the f = x^2 function. I wrote the code and it gives me just a blank plot. Here’s the code, I don’t know what’s wrong with it. I’d ble glad if someone helped me.

```
clc; clear all; close all;
function [x, f] = exponencial(N)
x = linspace(0, 1, N);
f = x^2;
end
for N = 10
[x, f] = exponencial(N);
plot(x, exponencial(N), '.-');
hold;
end
```

# My system

- OS: e.g.
**Windows 10 (version 2004)**or**Ubuntu 20.04** - Octave version: e.g.
**Version 6.1.0** - Installation method: e.g.
**Downloaded and installed “octave-6.1.0-w64-installer.exe” from Download**