LineSpec
to quickly customize the lines appearance in a plot
Description
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 useful 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.
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 without a line style, only the marker is drawn. This property is linked to the object's
mark_style
andmark_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' or 'p'
Five-pointed star (pentagram) No marker (default)
Examples
clf(); 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(); x=1:0.1:10; // If you specify a marker without a line style, only the marker is drawn plot(x,sin(x),'d')
clf(); x = 1:0.5:10; // Init. // The order of information about color, line style or markers does not matter // BUT the information must be unambiguous subplot(311);plot(x,sin(x),'.b-'); subplot(312);plot(x,sin(x),'b.-'); subplot(313);plot(x,sin(x),'b-.');// The point belongs to information about line style (not marker!)
See also
- color — returns the color id of a color
- GlobalProperty — customizes the objects appearance (curves, surfaces...) in a plot or surf command
- plot — 2D plot
- clf — Clears and resets a figure or a frame uicontrol
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