A very simple tutorial about vectors and matrices

Let's start with a really simple example. Try to complile the following program:

#include <itpp/itbase.h>
using namespace itpp;
//These lines are needed for use of cout and endl
using std::cout;
using std::endl;
int main()
{
//Declare vectors and matricies:
vec a, b, c;
mat A, B;
//Use the function linspace to define a vector:
a = linspace(1.0, 2.0, 10);
//Use a string of values to define a vector:
b = "0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0";
//Add two vectors:
c = a + b;
//Print results:
cout << "a = " << a << endl;
cout << "b = " << b << endl;
cout << "c = " << c << endl;
//Use a string to define a matrix:
A = "1.0 2.0;3.0 4.0";
//Calculate the inverse of matrix A:
B = inv(A);
//Print results:
cout << "A = " << A << endl;
cout << "B = " << B << endl;
//Exit program:
return 0;
}
itpp::Array
General array class.
Definition array.h:105
itbase.h
Include file for the IT++ base module.
itpp
itpp namespace
Definition itmex.h:37

When you run this program, the output shall look like this

a = [1 1.11111 1.22222 1.33333 1.44444 1.55556 1.66667 1.77778 1.88889 2]
b = [0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1]
c = [1.1 1.31111 1.52222 1.73333 1.94444 2.15556 2.36667 2.57778 2.78889 3]
A = [[1 2]
[3 4]]
B = [[-2 1]
[1.5 -0.5]]

If this is what you see, then congratulations! You have managed to compile your first it++ program!

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