Programming with SCILAB (pdf)

Examples of functions that include loops
SCILAB provides with the while … end and the for … end structures for creating
programming loops. Programming loops can be used to calculate summations or
products. For example, to calculate the summation
n
1
S( n)
= ∑ ,
1
2
k = 0 k +
we can put together the following function:
function [S] = sum1(n)
//|----------------------------------------|
//| This function calculates the summation |
//| |
//| n |
//| \--------- |
//| \ 1 |
//| S(n) = \ ______ |
//| / 2 |
//| / k + 1 |
//| /--------- |
//| k = 0 |
//| |
//|----------------------------------------|
S = 0 //Initialize sum to zero
k = 0 //Initialize index to zero
//loop for calculating summation
while k nn = [0:10];
-->m = length(nn);
-->SS = [];
//vector of values of n (nn)
//length of vector nn
//initialize vector SS as an empty matrix
-->for j = 1:m //this loop fills out the vector SS
--> SS = [SS sum1(n(j))]; //with values calculated from function
-->end
//sum1(n)
-->plot(nn,SS)
//show results in graphical format
The resulting graph is shown below:
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