Category Archive for: Built-in Functions

String functions

Most built-in functions and operators do not make sense when used with strings and will issue error messages if you use string arguments with them. Mathcad Professional, however, includes several specialized functions for working with strings. The strings used and returned by most of the functions described below are typed in a math placeholder by pressing the double-quote…

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Piecewise continuous functions

Piecewise continuous functions are useful for branching and iteration. There are five Mathcad functions falling into this category. The iffunction is useful for choosing one of two values based on a condition. The Heaviside step function, <I>(x), and the Kronecker Delta function, o(m, n), are special cases of the if function. The until function is used to drive…

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Alternate forms of the Fourier transform

The definitions for the Fourier transform discussed earlier are not the only ones used. For example, the following definitions for the discrete Fourier transform and its inverse appear in Ronald Bracewell’s The Fourier Transform and Its Applications (McGraw- Hill, 1986) • Instead of a factor of 1/ In in front of both forms, there is a factor of…

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Truncation and round off functions

These functions all have in common the fact that they extract something from theirarguments. The functions Re, 1m, and arg extract the corresponding part of a complex number. For more information on these functions, see Chapter 8, “Variables and Constants.” The functions cell and floor will return the next integer above and below their arguments respectively. You…

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Built-in Functions

This chapter lists and describes many of Mathcad’s built-in functions. Functions associated with Mathcad’s statistical and data analysis features are described in Chapter 14, “Statistical Functions.” Functions used for working with vectors are described in Chapter 10, “Vectors and Matrices.” And for functions to solve differential equations, see Chapter 16, “Solving Differential Equations.” The following sections make up this chapter:…

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