Calculate the values at the points of 10-point partition-periodic function

[atparaskevopoulos (Athanasios Paraskevopoulos)]

We want to define an error function E(x)=|f(x)-S_N(x)| where S_n for the partial sums of the Fourier series of the above function for N=7,14,20. (We have done it already). My question is how to calculate its values at the points of a 10-point partition of the base interval [-L,L] using the Table and Tableform commands.

Open in Wolfram Cloud ↗

[rohitnamjoshi]

Crossposted here.