Mathcad – what is it. A fancy calculator. A problem solving tool. A unit converter. An equation writer. We will explore pieces of all of these. Mathcad is a Windows type program. Menu bar across the top. Toolbars & buttons in other rows. Many of the tool palettes “float”.
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A fancy calculator
A problem solving tool
A unit converter
An equation writer
We will explore pieces of all of these
Menu bar across the top
Toolbars & buttons in other rows
Many of the tool palettes “float”
Write formulae using variables & numbers & math symbols
c The speed of light
g Acceleration due to gravity
And a host of units, so many unit conversions are done automagically:
A string of characters (including numbers and some
“special” characters (e.g. #, %, _, and a few more)
Cannot start with a number
Capitalization & spelling count!!!
A1 is different from a1
Be careful not to conflict with predefined name
(e.g. g = acceleration due to gravity, m = meter,
etc. -- which we will discuss later)
Be careful that variables and functions have different names
The “.” (period) starts a text subscript, which really is
part of the variable name
A1 is different from A1
The “[“ indicates an array subscript. Thus
A1 indicates an element in the array A
(it is the second element, as array
subscripts start with 0 by default
And, unfortunately, the two are very difficult to tell apart when you just look at them. Avoid the superscript tool on the tool bar!
Need to keep them straight and know when to use each!!!!
Assignment: equal signs
Type a “:” and see “:=“
Assigns value on right side to variable on left
Type a “=“ and see a “=“
Evaluates expression on left and displays on right
Type a “ equal signsctrl = “ and see a bold = sign
Indicates a logical equivalence between the left and right sides (Don’t worry about the details of this, but watch for its use.)
This is tough to see, but in Mcad the = sign is bold.
Main use is in solving equations.
Equivalence equal signs
Type a “~” and see three horizontal lines
Causes expression on left to be replaced by expression on right everywhere in the worksheet
Would cause all occurrences of “A” to be replaced by
y2 + 3
We won’t use this one, but here for completeness
And something to remember: equal signs
Mathcad evaluates the worksheet from left to right and top to bottom every time the worksheet is evaluated.
(unless you set the option to manual recalculation)
Do some of the tutorials equal signs
Getting Started Primers
Entering Math Expressions
Calculating with Variables.