Archive for: November, 2015

Spell-checking

After creating text, you can have Mathcad search it for misspelled words and suggest replacements. You can also add words that you commonly use to your dictionary. Note that Mathcad will spell-check only text regions, not math or graphics regions. Checking text for misspelled words To begin spell-checking, you first have to tell Mathcad what…

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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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Find and Replace

Mathcad’s Find and Replace commands work in both text and equations. When you search for a sequence of characters, Mathcad looks for that sequence as part of a variable or function name or as a piece of text in a text region. Searching for text To find a sequence of characters, • Choose Find from…

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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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Text region properties

Mathcad allows you to highlight the background of text regions so that they stand out from the rest of the equations and text in your worksheet. To apply a background highlight color to a text region: • Click in the text region you want to highlight. • Choose Properties from the Format menu. • Click…

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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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Modifying an existing text style

‘Ulu can change the definition of a text style-its text and paragraph properties-at any time. To modify a text style: • Choose Style from the Format menu. Mathcad brings up the Text Styles dialog box showing the currently available text styles. • Select the name of the text style you want to modify and click…

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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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Text styles

Mathcad uses text styles to assign default text and paragraph properties to entire text regions. Text styles give you an easy way to create a consistent appearance in your worksheets: rather than choose particular text and paragraph properties for each individual region, you can apply an available text style, setting a range of text and…

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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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