MATLAB MatLab - Raising each component of a matrix

[Aseeb]

I am in great need of the syntax that tells MatLab to raise the component of a vector to any power.

I also need to know the syntax that outputs the time to perform the calculation.



Thank you

 

[jhae2.718]

If you mean raising the each component of the vector to the same power, e.g. you want ${\boldsymbol x} ^ n = [x_0^n, x_1^n, \ldots, x_m^n]^T$, then you can use:

[i]% x = some vector[/i][/color]
x .^[/color] n;

For timing, you can use:

t = cputime;
[i]% do some operations here[/i][/color]
elapsed = cputime -[/color] t;
fprintf('Elasped time: %.2f s\n'[/color], elapsed);

 

[Aseeb]

Thank you, Sir.

 

[kreil]

For timing, you can also use 'tic' and 'toc' as follows:

X = 1:1000;
tic
X2 = X.^2;
toc

Elapsed time is 0.006004 seconds.

In general, you can put any code snippet between the two tags. 'tic' always marks the beginning of the timer, and 'toc' the end.