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MatLab - Raising each component of a matrix

by Aseeb
Tags: component, matlab, matrix, raising
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Aseeb
#1
Feb4-13, 09:19 PM
P: 3
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
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jhae2.718
#2
Feb4-13, 10:14 PM
PF Gold
jhae2.718's Avatar
P: 1,153
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:
% x = some vector
x .^ n;
For timing, you can use:
t = cputime;
% do some operations here
elapsed = cputime - t;
fprintf('Elasped time: %.2f s\n', elapsed);
Aseeb
#3
Feb4-13, 10:32 PM
P: 3
Thank you, Sir.

kreil
#4
Feb5-13, 10:24 AM
kreil's Avatar
P: 535
MatLab - Raising each component of a matrix

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.


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