image processing - Control Snapshot Speed In Matlab -

this project. wrote code using getdata command in matlab.i want take snapshots form webcam. snapshots speed.

i want slow snapshot frame. code written,

vid = videoinput('winvideo',3,'rgb24_1600x1200');     triggerconfig(vid,'manual');    set(vid,'framespertrigger',1); set(vid,'triggerrepeat', inf); start(vid); i=1:2     trigger(vid);     im=getdata(vid,1);     figure,imshow(im); end imwrite(im,'web.jpg'); stop(vid); 

use pause(n) in for loop, pauses execution n seconds before continuing. example pause(0.1).