Axis 282 Uživatelský manuál stáhnout pdf (Strana 13)

Chapter II-12 — Graphs

II-245

example, if the marquee is one half the size of the graph then the waves shrink to one half their former size.

The point at the center of the marquee becomes the new center of the graph. The shrink operation sets the

scaling mode for all axes to manual.

The horiz shrink operation is like the shrink operation but affects the horizontal axes only. It sets the scaling

mode for the horizontal axes to manual.

The vert shrink operation is like the shrink operation but affects the vertical axes only. It sets the scaling

mode for the vertical axes to manual.

Igor programmers can add their own items to this pop-up menu. Also, the coordinates of the marquee can

be read under program control and can even be used to set up automatic (dependency) formulas. See the

GetMarquee operation on page V-223.

Another way to manually scale axes is to use the Axis Range tab of the Modify Axis dialog (see Manual

Axis Ranges on page II-246), or the SetAxis operation (page V-565).

Panning

After zooming in on a region of interest, you may want to view data that is just off screen. To do this, press Option

(Macintosh) or Alt (Windows) and move the mouse to the graph interior where the cursor changes to a hand. Now

drag the body of the graph. Pressing Shift will constrain movement to the horizontal or vertical directions.

This operation is undoable.

Fling Mode

If, while panning, you release the mouse button while the mouse is still moving, the panning will automat-

ically continue. While panning, release the Option or Alt key and change the force or direction of the mouse-

click gesture to change the panning speed or direction. Click the mouse button once to stop.

Setting the Range of an Axis

You can set the range and other scaling parameters for individual axes using the Axis Range tab in the

Modify Axis dialog. You can display the dialog with this tab selected by choosing Set Axis Range from the

Graph menu or by double-clicking a tick mark label of the axis you wish to modify. Information on the other

tabs in this dialog is available in Modifying Axes on page II-264.

Start by choosing the axis that you want to adjust from the Axis pop-up menu. You can adjust each axis in

turn, or a selection of axes, without leaving this dialog.

Only for vertical axes.

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Axis 282 Uživatelský manuál Strana 13