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Graph550 - Simply input a specially formatted equation, and it will graph it for you Graph550 is a program to graph mathematical equations. Simply input a specially formatted equation, and it will graph it for you. It currently supports functions specified in terms of x, functions specified in terms of y, and parameterized equations.It also allows for precisely determining the view, and control of how the function is graphed. With Graph550 once you created a graph, you can print it out, or if it's more suitable, export it to PostScript, PDF or TIFF format.The standard mathematical order of operations. The following list is ordered from what takes highest priority to what takes lowest priority:· Number (floating point number, e, PI)· Variable (x, y, t, or n)· Parenthesis (innermost parenthesis evaluated first)· Function (See list of Built-in Functions)· Exponent (a^b raises a to the b-th power, use powers less than one for roots)· Multiplication (*, c(f(t)), (f(t))c, (f(t))(g(t)))· Division (/, a/b/c=(a/b)/c)· Opposite (-a)· Addition (+)· Subtraction (-)· Parameterized Equation Separator (x(t),y(t))So the function e^(sin(2t)+t)+t^2 takes t, multiplies it by two, takes the sine of that, adds t, raises e to that power, and finally adds t squared to the result. So if t was equal to 0, the result would be e^(sin(2*0)+0)+0^2=e^(sin(0))+0=e^0=1. Note the combining of different operations, and the use of parenthesis.All named functions such as sin(t) require parenthesis, and you must use a * to multiply a variable by a function. Finally, in order to get the value pi, simply type option-p.Here are some key features of "Graph":Simple Equations· The simplest functions are those in terms of x or y. Do not type 'y=' or 'x=' when you input a function of this type. If you type a function in terms of x, it will assume you want the result graphed on the y axis, and vice-versa if you type a function terms of y. Make sure to only use one variable per equation.Parameterized Equations· These equations let you define x and y in terms of a third variable t. Type (x(t),y(t)), where x(t) is a function in terms of t corresponding to x and y(t) is a function in terms of t corresponding to y. For example, (cos(t),sin(t)) graphs a circle. Make sure all functions are in terms of t, and there are no x's or y's. If you wish to do a function in terms of r and theta, think of it as a function like r(t) and type (r(t)cos(t),r(t)sin(t)). Note that the variable n can be used in any of these functions.Graph Viewport· To move around the graph, drag the view around. Otherwise, select "Show Advanced Drawer" in the View menu. The "Center X" and "Center Y" fields specifies the point you want the center of the graph to be at. "Width" and "Height" set how many units you want to see widthwise and heightwise, respectively. These effectively allow you to set a zoom level. Alternatively you can zoom with the "Zoom Level" slider, which allows you to zoom from a width and height of .001 to a width and height of 3,000. It adjusts exponentially.Variation· You can add a "variation" variable n to any function. This takes a fixed value during each graphing, but can be changed at will. Use the "Variation" field to set n to a certain value and graph, or use the variation slider to continuously change the value of n.Other Advanced Options· "Start" and "End" are used in parameterized equations. They correspond to the starting t value and the ending t value. For example, if you graph the circle (cos(t),sin(t)) and have start equal to zero and end equal to 3.1415, it will graph the upper half of a circle. "Function Color" lets you change the color of the function. "Increment" allows you to change how close the points of graphing are to each other. Usually this can be left alone, but certain functions will be graphed drastically different based on this value. The lower it is, the more precise the graph, but the slower the graphing process. Finally, if you want to see a list of built-in functions, select "Built-in Functions" from the "Help" menu.

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