Axis 282 Uživatelský manuál stáhnout pdf (Strana 17)

Chapter II-12 — Graphs

II-249

If you want to fully understand how Igor arrives at the final size of a graph when the width or height is

constrained, you need to understand the algorithm Igor uses:

1. The initial width and height are calculated. When you adjust a window by dragging, the initial

width and height are based on the width and height to which you drag the window. When you

print a graph, the initial width and height are the width and height of the graph window.

2. If you are printing, the width and height are modified by the effects of the printing mode that you

have selected (full page, custom size, same size or same aspect). Usually, when using a width or

height mode, you should print the graph using the same size radio button.

3. The width modes absolute and per unit are applied which may generate a new width.

4. The height mode is applied which may generate a new height.

5. The width modes aspect and plan are applied which may generate a new width.

Because there are many interactions, it is possible to get a graph so big that you can’t adjust it manually. If this

occurs, use the Modify Graph dialog to set the width and height to a manageable size, using absolute mode.

When you are about to print, you can get a feel for the outcome of this algorithm by adjusting the graph

window to the shape of a page and then observing how the algorithm alters the graph size.

There is an additional overall graph property that you can access only via the command line. If you live in

a country that uses “,” rather than “.” as the decimal separator in numbers then you can use the following

command to cause tick mark labels to use comma as the separator:

ModifyGraph useComma=1

This displays tick mark labels such as “1,000.0” as “1.000,0”.

Modifying Styles

You can specify each trace’s appearance (or style) in a graph by choosing Modify Trace Appearance from

the Graph menu or by double-clicking a trace in the graph. This brings up the following dialog:

For image plots, choose Modify Image Appearance from the Graph menu, rather than Modify Trace Appearance.

For contour plots, you normally should choose Modify Contour Appearance. Use this to control the appear-

ance of all of the contour lines in one step. However, if you want to make one contour line stand out, use

the Modify Trace Appearance dialog. For example, you could make the contour line at z=0 a dashed line to

call special attention to it.

Illustrates current settings.

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 79 80

Žádné komentáře

Axis 282 Uživatelský manuál Strana 17