Elementary Mathematical and Computational Tools for by Jamal T. Manassah

By Jamal T. Manassah

Engineers world wide depend upon MATLAB for its energy, usability, and notable photos functions. but too frequently, engineering scholars are both left all alone to procure the heritage they should use MATLAB, or they have to research this system simultaneously inside of a complicated direction. either one of those ideas hold up scholars from fixing practical layout difficulties, specifically after they shouldn't have a textual content occupied with purposes suitable to their box and written on the applicable point of mathematics.

Ideal to be used as a short-course textbook and for self-study effortless Mathematical and Computational instruments for electric and desktop Engineers utilizing MATLAB fills that hole. obtainable after only one semester of calculus, it introduces the numerous functional analytical and numerical instruments which are necessary to luck either in destiny stories and in specialist lifestyles. Sharply interested in the desires of and computing device engineering groups, the textual content offers a wealth of suitable routines and layout difficulties. adjustments in MATLAB's model 6.0 are integrated in a unique addendum.

The loss of abilities in primary quantitative instruments can heavily abate growth in one's engineering stories or occupation. through operating via this article, both in a lecture/lab atmosphere or by means of themselves, readers won't in basic terms commence gaining knowledge of MATLAB, yet they're going to additionally hone their analytical and computational talents to a degree that might support them to take pleasure in and achieve next electric and machine engineering goals.

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Thus, what should we do if we want both points plotted on the same graph? The answer is to use the hold on command after the first plot. 5; y2=4; plot(x2,y2,'og') hold off The hold off turns off the hold on feature. qxd 9/2/06 12:03 PM Page 8 Elementary Mathematical and Computational Tools Using MATLAB® 8 NOTES 1. There is no limit to the number of plot commands you can type before the hold is turned off. 2. An alternative method for viewing multiple points on the same graph is available: we may instead, following the entering of the values of x1, y1, x2, y2, enter: >>plot(x1,y1,'*r',x2,y2,'og') This has the advantage, in MATLAB, if no color is specified, that the program assigns automatically a different color to each point.

Qxd 9/2/06 12:03 PM Page 13 Starting with MATLAB® and Exploring Its Graphics Capabilities 13 A. The simplest form of this structure is: if expression Commands evaluated if expression is True else Commands evaluated if expression is False end NOTES 1. The commands between the if and else statements are evaluated for all elements in the expression which are true. 2. The conditional expression uses the Boolean logical symbols & (AND), | (OR), and ϳ (NOT) to connect different propositions. 9 Find for integer a, 0 Ͻ a Յ 10, the values of C, defined as follows: for a Ͼ 5  ab  C ϭ3  ab for a Յ 5 2 and b ϭ 15.

This is useful when you wish to see the correct x to y scaling. For example, without this command, a circle will look more like an ellipse, even if we have chosen ymax Ϫ ymin ϭ xmax Ϫ xmin. , 1. Solution: Enter the following: >>x1=-1;y1=-1; >>x2=1;y2=-1; >>x3=-1;y3=1; >>x4=1;y4=1; >>plot(x1,y1,'o',x2,y2,'o',x3,y3,'o',x4,y4,'o') >>axis([-2 2 -2 2]) >>axis square %makes the aspect ratio 1 ٗ Note that prior to the axis square command, the square looked like a rectangle. If you want to go back to the default aspect ratio, type axis normal.

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