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After this expression is executed, the response typed, and Enter pressed, the value (or series of values) entered is assigned to VariableName. 2. There are several ways of getting program results to the command window. The first is simply to omit the semicolon (;) at the end of an expression. In this case, MATLAB displays in the command window the variable’s name followed by an equal sign, and then skips to the next line and displays the value(s) of the variable. This method is useful during debugging.

7000 » The use of semicolons instead of the commas would have suppressed this output. 10 Chapter 1 Introduction Arithmetic Operators The five arithmetic operators to perform addition, subtraction, multiplication, division, and exponentiation are +, -, *, /, and ¿, respectively. For example, the mathematical expression t = a k 1 b 1 + px can be written in MATLAB as t = (1/(1+p*x)) ¿k when p, x, and k are scalar quantities. The quantities p, x, and k must be assigned numerical values prior to the execution of this statement.

If the decimal representation of numbers is desired, then one uses vpa(f, n) where f is the symbolic expression and n is the number of digits. 0*a^2) 34 Chapter 1 Introduction Variable Precision Arithmetic The symbolic toolbox can also be used to calculate quantities with more than 15 digits of accuracy by using vpa in the following manner. vpa('Expression', n) where Expression is a valid MATLAB symbolic relation and n is the desired number of digits of precision. To illustrate the use of this function, consider the evaluation of the following expression y = 32!

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