Scilab Function
Last update : 28/12/2008
LineSpec - to quickly customize the lines appearance
in a plot
Calling Sequence
- None. The LineSpec is an optional argument that can
be used inside a plot command to customize each new line aspect. It has to
be given as a concatenated string containing information about color, line
style or markers. It is very usefull to quickly specify such basic line
properties.
- To specify a red longdash-dot with diamond marker,
the string can be 'r-.diam'. As you can see, a full complete spelling of
each property value is not required but the string, which is a
concatenation (in any order) of these three types of properties , must
remain unambiguous. Furthermore, the string specification is not case
sensitive.
Description
Here is a complete list of the LineSpec types you can
specify (using plot).
-
LineStyle: a string defining the line style. This property is linked to the
object's line_style property (see
polyline_properties).
Specifier |
Line Style |
- |
Solid line (default) |
-- |
Dashed line |
: |
Dotted line |
-. |
Dash-dotted line |
-
Color: a string defining the line color. This property is linked to the
object's foreground property (see
polyline_properties).
Specifier |
Color |
r |
Red |
g |
Green |
b |
Blue |
c |
Cyan |
m |
Magenta |
y |
Yellow |
k |
Black |
w |
White |
-
A default color table is used to color plotted curves if you do
not specify a color (neither with LineSpec nor with
GlobalProperty). When drawing multiple lines, the plot
command automatically cycles through this table. Here are the used
colors:
-
R |
G |
B |
0. |
0. |
1. |
0. |
0.5 |
0. |
1. |
0. |
0. |
0. |
0.75 |
0.75 |
0.75 |
0. |
0.75 |
0.75 |
0.75 |
0. |
0.25 |
0.25 |
0.25 |
-
Marker type: A string defining the marker type. note that if you specify a
marker wihtout a line style, only the marker is drawn. This property
is linked to the object's mark_style and
mark_mode properties (see
polyline_properties).
Specifier |
Marker Type |
+ |
Plus sign |
o |
Circle |
* |
Asterisk |
. |
Point |
x |
Cross |
'square' or
's'
|
Square |
'diamond' or
'd'
|
Diamond |
^ |
Upward-pointing triangle |
v |
Downward-pointing triangle |
> |
Right-pointing triangle |
< |
Left-pointing triangle |
'pentagram' |
Five-pointed star (pentagram) |
'none' |
No marker (default) |
Examples
x=1:0.1:10; // Init.
plot(x,sin(x),'r.->') // plots a dash-dotted line with a right-pointing triangle centered on each points.
clf();
// If you specify a marker wihtout a line style, only the marker is drawn
plot(x,sin(x),'d') // plots a dash-dotted line with a right-pointing triangle centered on each points.
x=1:10; // Init.
// combinations' order does not matter
plot(x,x.*x,'*cya--')
//multiple plots with different LineSpecs
clf();
t=0:%pi/20:2*%pi;
plot(t,sin(t),'ro-.',t,cos(t),'cya+',t,abs(sin(t)),'--mo')
See Also
GlobalProperty, plot, clf,
Author
F.Leray