
The Graphing & List Window offers a convenient function graphing facility, as shown below. If the Function Grapher is not displayed, select Function Graphing from the window's Chart menu.
DreamCalc Function Graphing
1. Type
your function into the entry box, using "x" to specify the variable. Any
prefix, such as "y=", is not necessary.
2. Specify the xvalue range in the MIN and MAX boxes.
3. Press return, or enter as plot A or B, as described below.
Example:
exp(cos(x))  2 * cos(4 * x) + sin(x / 12)
Rather than hitting return to enter your function, you may designate your plot as either "A" or "B" by clicking the "Enter" dropdown button. Two plots may be shown simultaneously using this method.
The input of your expression is not case sensitive. The maximum graphing numerical range is: 1E100 < x or y < 1E100. Complex numbers are not supported in graphing.

The Function Grapher has it's own angle mode, as indicated by the radio buttons in the top right of the window. This angle mode is independent of the calculator's main angle mode. It defines the operation of the trigonometric functions when the function plot is created. When changing the angle mode, you must reenter your function by clicking Enter.
Prior to plotting your function, you should specify the desired range of x using the MIN/MAX range edit boxes. You may also use simple expressions in the range boxes, such as: "0.86 * PI".
Alternatively, you may specify the range as part of the function input string itselfusing square brackets and a semicolon " ; " as the separator.
For example:
sin(x) [0; PI/2]
DreamCalc will strip off the range values and fill out the range boxes for you when the function is entered. You must, however, specify the interval separately in the Interval or No. Points edit box (see right).
DreamCalc needs to know how many data points to generate. You can choose how to specify this using the following radio buttons:
Specify No. Points
Allows you to specify the number of points, where the corresponding interval
will be calculated automatically. Generally this option is more convenient,
as you do not have to redefine the interval for every function plot. However,
it doesn't offer precise control of the values generated as xinputs to
your plot.
Specify Interval
Allows you to specify an interval, giving you precise control over the x
values used as input to your expression. For example, if your range is [0;
10] and you specify an interval value of 1, points will be generated at
integers x = 0, 1, 2, 3... up to and including 10, or eleven points in total.
If your input range and interval define a number of points greater than
the maximum number of permissible points, the interval will be adjusted
so as to limit the number of points.
A plot will be generated if two or more yvalue points were determinedeven if some yvalues could not be calculated. If some points could not be calculated, DreamCalc will display a small warning message in the graphing display to indicate this. If no plot data could be generated, an applicable error is be shown.
When the Output to XY List option is checked, XY point data is copied to the XY list when the plot is generated. From the list page tab, you may then edit and export the underlying data. You may redisplay the data by selecting a suitable XY chart from the Chart menu.
The effect of the Output to XY List option is to overwrite the XY list each time you generate a function plot. If you accidentally overwrite your list, simply go to the list page tab and click undo to recover the your original data.
You may also use the parametric variable "t" in the function input. In this case, DreamCalc will generate a plot in parametric space.
Example:
exp(cos(t))  2 * cos(4 * t) + sin(t / 12) Suggested Range: [0; 12PI] No. Points: 1000 Angle Mode: Radians
This is similar to specifying a function using the xvariable, and then selecting Axes>Polar Plot. However, when the tvariable is used, a parametric plot will be rendered directly onto an XY grid even if the Polar Plot option is not selected. In addition, if the Output to XY List option is checked, plot data will be copied to the XY list in polar rt form.
Use of both the x and t variables in the same input string is disallowed.
Generally, plots will be generated instantly. However, lengthy functions and a high number of data points may cause DreamCalc to timeout, generating only a partial plot over the desired input range. By default, DreamCalc will timeout on graphing operations after approximately 5 seconds. You can increase this in Options Window by setting the Timeout option to a value greater than 5 seconds.
It was stated above that you must use semicolon as separator when specifying a range input string. The reason for not using a comma is simply that many European users use comma as the decimal point. However, if you use a period for decimal points, you may if you wish use a comma as the separator instead of semicolon.
Special! Free Choice of
Complete Excel
Training Course OR
Excel Addins Collection
on all purchases totaling over $70.00.
ALL purchases totaling over $150.00 gets
you BOTH! Purchase MUST be made via this site.
Send payment proof to [email protected] 31 days after purchase date.
Pricing: 

Pricing: 

Instant Download and Money Back Guarantee on Most Software
Excel Trader Package Technical Analysis in Excel With $139.00 of FREE software!
Microsoft ® and Microsoft Excel ® are registered trademarks of Microsoft Corporation. OzGrid is in no way associated with Microsoft