I love basketball

My balls/lagranjames.m

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+X = [2 2.2 2.4 2.6 2.8]
+Y = [0.52 0.63 0.85 1.1 1.3]
+
+function solution = lagranjames(X,Y,x)
+	L = 0;
+	for k = [1:length(X)] # Summation loop
+
+		l = 1;
+		for i = [1:length(X)] # Product loop
+			if ( i != k ) # no 0s in our bottom fraction
+			l = l *  ( x - X(i) ) / ( X(k) - X(i) ); # This the Π part of the rule
+			endif
+		endfor
+		L = L + l * Y(k); # This is the sigma part
+	endfor
+	solution = L;
+
+endfunction
+balls = lagranjames(X,Y,2.3)