Re: New gnuplot subsystem "watchpoints"

[Tatsuro M. <tma...@ya...>]

The output of demo of watchpoints (watchpoints.dem) was prepared in pdf file and the file was uploaded to 
http://tmacchant33.starfree.jp/Files/watchpoits.pdf

Tatsuro

> ----- Original Message -----
> 
> From: "Tatsuro MATSUOKA via gnuplot-beta" <gnu...@li...>
> To: "Ethan A Merritt" <me...@uw...>; "gnu...@li..." <gnu...@li...>
> Date: 2022/09/07 水 23:48
> Subject: Re: New gnuplot subsystem "watchpoints"
> 
> 
> I have made windows and cygwin binary packages with "watchpoints" and uploaded the below.
> http://tmacchant33.starfree.jp/gnuplot_bin.html
> 
> Tatsuro
> 
> > ----- Original Message -----
> > 
> > From: "Ethan A Merritt" <me...@uw...>
> > To: "gnu...@li..." <gnu...@li...>
> > Date: 2022/09/06 火 16:03
> > Subject: New gnuplot subsystem "watchpoints"
> > 
> > 
> > This is a project I started a couple of years ago.
> > I think it is now ready for general testing and use, so I have
> > added it to the development branch with a configuration option
> > 
> >     configure --enable-watchpoints
> > 
> > The "help" text is below:
> > 
> >  Syntax:
> >        plot FOO watch {x|y|z|F(x,y)} = <value>
> >        plot FOO watch mouse
> > 
> >        set style watchpoints nolabels
> >        set style watchpoints label <label-properties>
> > 
> >        unset style watchpoints      # return to default style
> > 
> >        show watchpoints    # summarizes all watches from previous plot command
> > 
> >  A watchpoint is a target value for the x, y, or z coordinate or for a function
> >  f(x,y).  Each watchpoint is attached to a single plot within a `plot` command.
> >  Watchpoints are tracked only for styles `with lines` and `with linespoints`.
> >  Every component line segment of that plot is checked against all watchpoints
> >  attached the plot to see whether one or more of the watchpoint targets is
> >  satisfied at a point along that line segment. A list of points that satisfy the
> >  the target condition ("hits") is accumulated as the plot is drawn.
> > 
> >  For example, if there is a watchpoint with a target y=100, each line segment
> >  is checked to see if the y coordinates of the two endpoints bracket the target
> >  y value.  If so then some point [x,y] on the line segment satisfies the target
> >  condition y = 100 exactly.  This target point is then found by linear
> >  interpolation or by iterative bisection.
> > 
> >  Watchpoints within a single plot command are numbered successively.
> >  More than one watchpoint per plot component may be specified.
> >  Example:
> >       plot DATA using 1:2 smooth cnormal watch y=0.25 watch y=0.5 watch y=0.75
> > 
> >  Watchpoint hits for each targets in the previous plot command are stored in
> >  named arrays WATCH_n.  You can also display a summary of all watchpoint hits
> >  from the previous plot command;  see `show watchpoints`.
> > 
> >       gnuplot> show watchpoints
> >       Plot title:     "DATA using 1:2 smooth cnormal"
> >         Watch 1 target y = 0.25         (1 hits)
> >                 hit 1   x 49.7  y 0.25
> >         Watch 2 target y = 0.5          (1 hits)
> >                 hit 1   x 63.1  y 0.5
> >         Watch 3 target y = 0.75         (1 hits)
> >                 hit 1   x 67.8  y 0.75
> > 
> >  Smoothing: Line segments are checked as they are drawn.  For unsmoothed data
> >  plots this means a hit found by interpolation will lie exactly on a line
> >  segment connecting two data points.  If a data plot is smoothed, hits will
> >  lie on a line segment from the smoothed curve.  Depending on the quality
> >  of the smoothed fit, this may or may not be more accurate than the hit from
> >  the unsmoothed data.
> > 
> >  Accuracy: If the line segment was generated from a function plot, the exact
> >  value of x such that f(x) = y is found by iterative bisection.
> >  Otherwise the coordinates [x,y] are approximated by linear interpolation
> >  along the line segment.
> > 
> >  Using the current mouse x coordinate as a watch target generates a label
> >  that moves along the line of the plot tracking the horizontal position of
> >  the mouse.  This allows simultaneous readout of the y values of multiple
> >  plot lines in the same graph.  The appearance of the point indicating the
> >  current position and of the label can be modified by `set style watchpoint`
> >  and `set style textbox`
> > 
> >  Example:
> > 
> >       set style watchpoint labels point pt 6 ps 2 boxstyle 1
> >       set style textbox 1 lw 0.5 opaque
> >       plot for [i=1:N] "file.dat" using 1:(column(i)) watch mouse
> > 
> > 
> > 
> > 
> > 
> > 
> > _______________________________________________
> > gnuplot-beta mailing list
> > gnu...@li...
> > Membership management via: https://lists.sourceforge.net/lists/listinfo/gnuplot-beta
> > 
> 
> 
> 
> _______________________________________________
> gnuplot-beta mailing list
> gnu...@li...
> Membership management via: https://lists.sourceforge.net/lists/listinfo/gnuplot-beta
>