Very Computer

I ran into a problem on how to set origin. say, I have the following data:

0  1 0 3
1  2 4 9

The first column is x-axies, somehow I need to skip the first row, so I

set xrange [1:..]

This moves the origin to (1,0), But i still need to keep the origin at
(0,0).

How can I do that?

Please CC to me, Thanks.
--Zhenhai
--------------------------------------------------------------

Computer Science Department     http://www.cs.umn.edu/~duan
University of Minnesota, TC     Phone: (612)626-7526(O)
--------------------------------------------------------------

Quote:> I ran into a problem on how to set origin. say, I have the following data:

> 0  1 0 3
> 1  2 4 9

> The first column is x-axies, somehow I need to skip the first row, so I

> set xrange [1:..]

> This moves the origin to (1,0), But i still need to keep the origin at
> (0,0).

> How can I do that?

You'll need to filter the data.  In gnuplot 3.5, there aren't any fancy
commands that will let you do this directly, but if your system supports
redirection you can run the filter from within the "plot" command.

For instance, if you write a little script "*" which simply ignores
the first line and echoes everything else to STDIN, then
    set xrange [0:...]
    plot "< *"
will do the trick.

If you are using gnuplot 3.7, you can do this completely with gnuplot commands.
    set xrange [0:...]
    plot 'data' using 1:($0>0?$2:0/0)
where the ternary operator syntax is
    condition ? do this if true : do this if false
(gnuplot will quietly ignore the unplottable value "0/0") and "$N" refers to
the value in column #N; N=0 refers to the line number.

I think what you want will be accomplished by the following in your plot
statement:

        plot [0:1000] [0:.20]  ...

The first sequence ``[0:1000]'' sets x-axis points while the second
sequence ``[0:.20]'' sets the y-axis plot points.

Good luck!

                                        -- Jerry Place
                                        -- CSTP

I ran into a problem on how to set origin. say, I have the following data:

0  1 0 3
1  2 4 9

The first column is x-axies, somehow I need to skip the first row, so I

set xrange [1:..]

This moves the origin to (1,0), But i still need to keep the origin at
(0,0).

How can I do that?

Please CC to me, Thanks.

--
--Zhenhai
--------------------------------------------------------------

Computer Science Department     http://www.cs.umn.edu/~duan
University of Minnesota, TC     Phone: (612)626-7526(O)
--------------------------------------------------------------