# RE: st: Adding lines to graphs

 From "Nick Cox" To Subject RE: st: Adding lines to graphs Date Fri, 11 Nov 2005 10:50:43 -0000

```Alternatively, it is not necessary to change the dataset size.

Given y and x, you create two new variables:

gen y1 = 0 in 1
replace y1 = y[1] in 2
gen x1 = 0 in 1
replace x1 = x[1] in 2

line y1 x1 || line y x

Admittedly, you still have to mess around
with legends, line styles etc. So either
you alter your data a little, as above or
below, or you use -scatteri- as earlier
suggested.

Nick
n.j.cox@durham.ac.uk

Ulrich Kohler

> celdjt@umich.edu wrote:
> > I have a series of interconnected monotonically declining
> plots that I am
> > presenting as a single connected line graph, i.e., a graph
> that starts
> > relatively high on the y axis, declines, jumbs vertically
> to a second high
> > point, declines again,etc (substantively describes a
> relationship between
> > varying values of a hazard ratio and age). I can't figure
> out how to add a
> > line going from the 0 point on the x axis to the initial
> value of the
> > graph. I would be most appreciative of any suggestions. Thanks
>
> I think you need to generate an observation with x=0.
> Assuming that the y-value for x=0 should be y=0:
>
> . set obs `=_N+1'
> . replace x = 0 in `=_N'
> . replace y = 0 in `=_N'
> . connected y x, sort
>
> Or, if your dataset contains only x and y:
>
> . input
> .  0 0
> .  end
> . connected y x, sort

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