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Chart & List Window

The Chart & List Window allows you to graph functions, plot data and edit lists. You can also use this window to perform numerical calculus.

Press F12 at any time to show or hide (toggle) the Chart & List Window, or select View->Chart & List from the calculator's main menu.

The Graphing & Professional Editions of DreamCalc provide a two page window with Chart View and List Data pages, as seen below. The Professional Edition has an additional Cashflow List for use in financial cashflow calculations.

DreamCalc Chart & List Window

The Scientific Edition of DreamCalc does not support graphing and shows only the List Data page for use in statistical calculations.

Available Charts

The following chart types are supported:

• Function Graph: two functions can be plotted on the same chart.
• X-Y Data Plot: shows a line of best fit for the current regression mode.
• Polar Plot: can be shown for either function graphs or X-Y data.
• Histogram: shows weighted data in SD mode.
• Frequency Polygon: shows weighted data in SD mode.
• Bar Chart: shows either X-Y or SD data.
• Q-Q Plot: normal quantile-quantile plot of SD data*.

*Professional Edition Only.

Graphing a Function

To graph a function, select Chart->Function Graph from the Chart Window's menu. See Graphing a Function for further information.

Plotting X-Y List Data

To plot X-Y data, first put the calculator into a suitable X-Y data mode from the Window's Mode menu. For example, click Mode->Linear Regression (X-Y).

Next click the Data List page tab and enter your X-Y data (you may copy and paste from a spreadsheet application or import a file).

Then select a suitable X-Y chart from the Chart menu, i.e. Chart->X-Y Data Charts->Scatter Points. Additionally, you can elect to show the line of best fit by toggling the Show Regression Fit menu option.

The example above shows an X-Y scatter plot with a cubic regression fit. You can toggle the statistical information shown beneath the plot by selecting View->Show Footer.

Plot SD List Data

To display SD data, put the calculator into the Standard Deviation mode. Then select a suitable chart, i.e. a histogram, from the Chart->SD Data Charts menu. Further information is available for Standard Deviation Charts.

Logarithmic & Polar Plots

An X-Y style chart can be shown with logarithmic axes, or converted to polar form. Use the Axes menu to select from the available options. You may select logarithmic scales for x and y axes independently. See also Polar Plots for further information.

Plot Tracing

You can use your mouse to easily trace along a plot—a circular marker will automatically follow the path of the plot. The coordinates of the plot tracer are displayed in the lower left of the window (see below).

Plot Tracing

You can "grab and hold" the current plot tracer position at any time by single clicking on the chart at the desired location.

Try this...

1. Move the cursor over a plot.
2. Single click at the desired position (do not drag the mouse).
3. Move the cursor away from the chart.

You will now see the coordinates were stored in the position box under the chart. You can click the copy button to the right of the box to copy the text to the clipboard.

Values are shown to the precision allowed by the size of the chart window. If two plots are visible, the trace marker will follow the plot nearest to the mouse cursor.

Zooming

You can perform chart zooming by simply dragging a rectangle over an area of interest with the mouse.

To unzoom, click the [UNZOOM] label which will appear at the bottom right of the chart, or select View->Unzoom.

Exporting Charts

A chart can be saved as one of several commonly used image formats from the window's File menu.

Perhaps the easiest method of export, however, is to simple copy the chart into the clipboard using the Edit menu. Two copy options are available: copy as metafile or bitmap. The metafile format is ideal for pasting into documents because it is vector based and can be resized without loss of resolution. However, there may be instances where only a bitmap is compatible.

See also: Graphing a Function, Graphing Examples, Standard Deviation Charts, Calculus & Intersection Points.

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