Thread Subject: Plotting: How to mark a part of a trace?

Hi all,

is there a tool in Matlab that allows to mark a part of a
trace by changing its color after plotting?

-Aino

Aino wrote:

> is there a tool in Matlab that allows to mark a part of a
> trace by changing its color after plotting?

plot() creates lineseries objects, a relatively newer object that
is slightly more advanced than the line objects that line() creates.
However, lineseries inherits all important behaviours from line
objects, and one of the key behaviours of line objects is that there
can only ever be one colour per line (or lineseries) object.
So if the "trace" that you refer to were created as single lines
by plot() or line() then NO, you cannot change part of their colour
afterwards.

In order to change the colour of part of a trace, it would have to
have been created as a series of line or lineseries objects. For example
if you wanted to be able to start changing the colour from half-way
between points (a common request) then you would have to use at least
two line or lineseries objects per visible point.

One trick that is sometimes used is to use a long thin patch
or surface object: patches and surface can have colour tables. patches
in particular are fairly flexible about their colour tables, allowing
things like interpolation of colours between vertices.

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