Comments on: Time Shifting and Scaling of Functions http://engineersphere.com/math/time-shifting-and-scaling-of-functions.html doesn't have to make sense to you, but it's probably great for your health. Tue, 13 Dec 2011 07:30:06 +0000 hourly 1 http://wordpress.org/?v=3.3 By: Luke http://engineersphere.com/math/time-shifting-and-scaling-of-functions.html/comment-page-1#comment-35 Luke Mon, 31 Jan 2011 21:30:35 +0000 http://engineersphere.com/?p=1317#comment-35 You are correct. I performed the time scaling and time shifting in opposite order. The signal should have been shifted by 6 seconds (3/(.5)) to the left and then scaled appropriately for the 1/2 factor. Updates on the way.. You are correct. I performed the time scaling and time shifting in opposite order. The signal should have been shifted by 6 seconds (3/(.5)) to the left and then scaled appropriately for the 1/2 factor. Updates on the way..

]]> By: tannerkorf http://engineersphere.com/math/time-shifting-and-scaling-of-functions.html/comment-page-1#comment-34 tannerkorf Mon, 31 Jan 2011 08:16:24 +0000 http://engineersphere.com/?p=1317#comment-34 I am pretty sure the flow of operations is: amplitude -> time shift -> time scale. for f(at-b): You must first time shift by 'b' to obtain f(t-b). Now time scale the shifted signal f(t-b) by 'a' to obtain f(at-b). or, time scale f(t) by 'a' to obtain f(at). Now time shift f(at) by 'b/a' to obtain f(at-b). From: Linear Systems book (Lathi) I am pretty sure the flow of operations is: amplitude -> time shift -> time scale.

for f(at-b): You must first time shift by ‘b’ to obtain f(t-b). Now time scale the shifted signal f(t-b) by ‘a’ to obtain f(at-b).

or,

time scale f(t) by ‘a’ to obtain f(at). Now time shift f(at) by ‘b/a’ to obtain f(at-b).

From: Linear Systems book (Lathi)

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