Read elapsed time from stopwatch
toc
elapsedTime = toc
toc(timerVal)
elapsedTime = toc(timerVal)
toc reads the elapsed time from the stopwatch
timer started by the tic function. The function
reads the internal time at the execution of the toc command,
and displays the elapsed time since the most recent call to the tic function
that had no output, in seconds.
elapsedTime = toc
toc( displays
the time elapsed since the timerVal)tic command corresponding
to timerVal.
elapsedTime = toc(timerVal)tic command corresponding
to timerVal.
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Value of the internal timer saved from a previous call to the |
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Scalar |
Measure time to generate two random matrices and compute element-by-element multiplication of their transposes.
tic A = rand(12000, 4400); B = rand(12000, 4400); toc C = A'.*B'; toc
Measure how the time required to solve a linear system varies with the order of a matrix:
t = zeros(1,100);
for n = 1:100
A = rand(n,n);
b = rand(n,1);
tic;
x = A\b;
t(n) = toc;
end
plot(t)Measure multiple time spans simultaneously using two pairs of tic/toc calls.
To do this, measure the minimum and average time to compute a summation
of Bessel functions:
REPS = 1000; minTime = Inf; nsum = 10;
tic; % TIC, pair 1
for i=1:REPS
tStart = tic; % TIC, pair 2
total = 0;
for j=1:nsum
total = total + besselj(j,REPS);
end
tElapsed = toc(tStart); % TOC, pair 2
minTime = min(tElapsed, minTime);
end
averageTime = toc/REPS; % TOC, pair 1 Consecutive calls to the toc function
with no input return the elapsed since the most recent tic.
Therefore, you can take multiple measurements from a single point
in time.
Consecutive calls to the toc function with
the same timerVal input return the elapsed time
since the tic function call that corresponds
to that input.
The following actions result in unexpected output:
tic and toc to
time timeittic and toc within
a function timed by timeit