Texas Instruments 83CML/ILI/U Guidebook - Page 127
Exploring Sequence Graphs
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Exploring Sequence Graphs Free-Moving Cursor The free-moving cursor in Seq graphing works the same as in Func graphing. In RectGC format, moving the cursor updates the values of X and Y; if CoordOn format is selected, X and Y are displayed. In PolarGC format, X, Y, R, and q are updated; if CoordOn format is selected, R and q are displayed. TRACE The axes format setting affects TRACE. When Time, uv, vw, or uw axes format is selected, TRACE moves the cursor along the sequence one PlotStep increment at a time. To move five plotted points at once, press y ~ or y |. • When you begin a trace, the trace cursor is on the first selected sequence at the term number specified by PlotStart, even if it is outside the viewing window. • Quick Zoom applies to all directions. To center the viewing window on the current cursor location after you have moved the trace cursor, press Í. The trace cursor returns to nMin. In Web format, the trail of the cursor helps identify points with attracting and repelling behavior in the sequence. When you begin a trace, the cursor is on the x-axis at the initial value of the first selected function. Tip: To move the cursor to a specified n during a trace, enter a value for n, and press Í. For example, to quickly return the cursor to the beginning of the sequence, paste nMin to the n= prompt and press Í. Moving the Trace Cursor to Any Valid n Value To move the trace cursor to any valid n value on the current function, enter the number. When you enter the first digit, an n = prompt and the number you entered are displayed in the bottom-left corner of the screen. You can enter an expression at the n = prompt. The value must be valid for the current viewing window. When you have completed the entry, press Í to move the cursor. Sequence Graphing 6-9
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