
Chapter II-12 — Graphs
II-286
In the last three cases, Igor has added units or scaling to the last tick mark label because the axis label itself
does not contain the units and scaling information. You can suppress this by choosing Manual Override
from the Units pop-up menu.
The following two examples show what happens when the axis label does contain scaling and units escape
codes. (“\S” is the superscript escape code):
Here is a table showing how the escape codes react to different conditions:
The situation with log axes is a bit different. By their nature, log axes never have to be scaled and units/scal-
ing escape codes are not used in axis labels. If the controlling wave for a log axis has units then Igor auto-
matically uses the units along with the appropriate prefix for each major tick mark label. Here are two log
axes; one where the controlling wave does not have units and one where it does:
Axis Range Wave
Units
Units \U Exponential
Prefix \u
Inverse Exponen-
tial Prefix \u#1
Scaling \E Inverse
Scaling \e
0…1 none
0…1E9 none
x10
9
10
9
10
-9
x10
9
x10
-9
0…1
Hz Hz Hz Hz
0…1E9
Hz GHz
10
9
Hz 10
-9
Hz x10
9
x10
-9
1.0x10
9
0.80.60.40.20.0
axis label
Axis range: 0..1E9 ; Wave units: none ; Axis label text: axis label
1.0Hz0.80.60.40.20.0
axis label
Axis range: 0..1 ; Wave units: Hz ; Axis label text: axis label
1.0GHz0.80.60.40.20.0
axis label
Axis range: 0..1E9 ; Wave units: Hz ; Axis label text: axis label
1.00.80.60.40.20.0
Acceleration, 10
9
m/s
2
Axis range: 0..1E9 ; Wave units: none ; Axis label text: Acceleration, \um/s\S2
1.00.80.60.40.20.0
Frequenc
, GHz
Axis range: 0..1E9 ; Wave units: Hz ; Axis label text: Frequency, \U
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