Lecture6 - Engineering Analysis ENG 3420 Fall 2009 Dan C....

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Engineering Analysis ENG 3420 Fall 2009 Dan C. Marinescu Office: HEC 439 B Office hours: Tu-Th 11:00-12:00 2 Lecture 6 Lecture 6 Last time: Internal representations of numbers and characters in a computer. Arrays in Matlab Matlab program for solving a quadratic equation Today: Roundoff and truncation errors More on Matlab Next Time More on approximations. 3 Accuracy versus Precision Accuracy how closely a computed or measured value agrees with the true value , P recision how closely individual computed or measured values agree with each other. a) inaccurate and imprecise b) accurate and imprecise c) inaccurate and precise d) accurate and precise 4 Errors when we know the true value True error ( E t ) the difference between the true value and the approximation. Absolute error (| E t |) the absolute difference between the true value and the approximation. True fractional relative error the true error divided by the true value. Relative error ( ε t ) the true fractional relative error expressed as a percentage. For iterative processes, the error can be approximated as the difference in values between successive iterations. 5 Stopping criterion Often, we are interested in whether the absolute value of...
View Full Document

This note was uploaded on 02/17/2012 for the course EGN 3420 taught by Professor Staff during the Spring '08 term at University of Central Florida.

Page1 / 17

Lecture6 - Engineering Analysis ENG 3420 Fall 2009 Dan C....

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online