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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 returns the elapsed time in a variable.
toc(timerVal) displays the time elapsed since the tic command corresponding to timerVal.
elapsedTime = toc(timerVal) returns the elapsed time since the tic command corresponding to timerVal.
elapsedTime |
Scalar double representing the time elapsed between tic and toc commands, in seconds. |
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