We've already seen many simple examples of calling functions. Now, we'll use the plot function to illustrate more advanced ways to call functions. Evaluate the following code:
var('x')
sinc(x) = sin(x) / x
plot(sinc, (x, -10, 10))The result should look like this:
Now, let's customize our plot:
plot(sinc, x, xmin=-15, xmax=15, thickness=2, color='red',
legend_label='sinc')The customized plot should look like this:
In the first part of the example, we defined a callable symbolic expression that represents the sinc function. This function has important applications in signal processing and information theory. We plotted the function using a simple call to the plot function. When calling a function with multiple arguments, it is important to put the arguments in the right order. The first argument to plot is the callable symbolic expression. The second argument is known as a tuple, which we'll learn about in the next chapter. The tuple...