Path: utzoo!utgpu!watmath!clyde!att!rutgers!ucsd!sdcsvax!ucsdhub!hp-sdd!hplabs!hpda!hpdslab!hpiacla!jim
From: jim@hpiacla.HP.COM (Jim Rogers)
Newsgroups: comp.unix.questions
Subject: Re: Troff "grap" question
Message-ID: <3600015@hpiacla.HP.COM>
Date: 2 Dec 88 16:27:59 GMT
References: <618@wc11.idca.tds.philips.nl>
Organization: Hewlett Packard
Lines: 21

>I want to use the troff "grap" preprocessor to plot a graph. The problem is
>that the input has as x-coordinate weeknumbers. So the range of the
>x-axis is e.g. 8801:8852, 8901:8952, ..........
>
>How can i tell "grap" that there is a gap in the x-axis; that week 8901 is the
>successor of week 8852 and NOT 8900 !


You will have to pass the data through a filter which adds another column.
This new column should be the number of weeks since some starting date.
For instance, if your starting date is 8801 then a week value of 8801
would give a week offset of 0, week value 8801 would give a value of 1, and
8901 would give a week value of 52.

This new column would be used to plot the x-axis values.
The original week date column would be used as labels for the x-axis
tick marks.


Jim (my plotter is a Laserjet II) Rogers        Hewlett Packard
                                                Sunnyvale, California