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# Drawing a function in Matplotlib

schedule Aug 11, 2023
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PythonMatplotlib
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# Drawing a parabola

To draw a parabola (`y=x**2`):

``` import matplotlib.pyplot as pltx = np.linspace(-10, 10, 1000) # Domain from -10 to 10 with 1000 data-pointsplt.title("Parabola \$y=x^2\$")plt.xlabel("\$x\$", fontsize=14)plt.ylabel("\$y\$", fontsize=14)plt.plot(x, x**2) ```

The output is as follows:

# Helper function to draw functions

``` def my_func(x): return x**2def plot_function(x_lim, my_func): """ @param x_lim {Array} an array of size two that contains the lower and upper x limits @param my_func {Function} the function that we want to plot """ x = np.linspace(x_lim[0], x_lim[1], 1000) plt.xlabel("\$x\$", fontsize = 14) plt.ylabel("\$y\$", fontsize = 14) plt.plot(x, my_func(x)) ```

We can use plot a curve like so:

``` plot_function([-10,10], my_func) ```

The output is as follows:

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