Displaying TEXTs

The following commands show how a TEXT is created and how the default attributes are changed:

SPECTRA> create/text/string="Ein Beispiel Text" 0.2
SPECTRA> set 0.2/y=0.8/col=2

The sections 15.3.69 and 15.3.16 give more details about these commands.

TEXTs may be displayed using different character sets. SPECTRA supports only those fonts that appear both in X and in Postscript (ISOLatin1Encoding Vector), see the table in section 15.3.69. The download section of this manual () provides a file that shows the available fonts. Any character can be accessed by its octal value, e.g.:\101 is 'A'.

Apart from plain text, SPECTRA offers the possibility to display special characters, subscripts, superscripts, ... SPECTRA is rather limited in this respect, but whenever a feature is included, it is done a LaTex style syntax. So far we have:

 Symbols
The available symbols are displayed in tables, starting in section 15.3.69. Example: \angstroem $\rightarrow$ Å.

 In-line font selection
\nf{new_number}.

 Indices
$text_{subindex}^{superindex}$.

 ä, ö, ü, ß
Example: G\"ansef\"u\ss{}chen $\rightarrow$ Gänfüßchen

 Space
\hspace{x}, \vspace{y}, \sp{x,y}: x and y are measured in the NDC frame.

 Escape character:\

The figure in section 10.4 shows some example TEXTs. Here is the code

!
! nano latex example
!
 create tn 0 10 200
 calc tn = tan(tn) + 50
!
! col=2 ist red
!
 set 1/col=2
!
! col=4 is blue
!
 set 1.3/col=4/string="\lambda [\angstroem{}]"
!
! Make an Umlaut. 
!  - Notice that a double quote '"' which is preceeded
!    by a slash '\' has not to be 'closed' by a second '"'.
!  - ux, uy are the up-vector which rotates the text.
!  - h_align=2 means 'centered' horizontal alignment.
!  - col=4 is blue
!
 set 1.4/col=4/string=Intensit\"at/y=0.5
 set 1.4/x=-0.15/uy=0/ux=-1/h_al=2
!
! Create a TAG.
!  - tag_type=3 selects an left-arrow 
!  - par2 is the angle. 
!
 crea/tag/col=4/tag_typ=3/string="C$^{14}$" 1
 set 1.5/par2=45/x=0.56/y=0.46 

 display
 post/eps

Figure 10.2: Nano LaTex, code on sec. 10.4