R devel - Feb 2000 - small bug in plot code

I get a segfault from:

R> plot( x, y, log="does this work?" )

[telford@faraday ring-core]$ R --version
Version 0.64.2  (July 3, 1999)
Copyright (C) 1999 R Development Core Team

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under the terms of the
GNU General Public License.  For more information about
these matters, see http://www.gnu.org/copyleft/gpl.html.

(gdb) up
#3  0x80927c2 in do_plot_window (call=0x40269760, op=0x4025ceac, 
    args=0x4060f428, env=0x4060f400) at plot.c:373
373                 errorcall(call,"invalid \"log=%s\"
specification\n",*p);

(gdb) list
371                 break;
372             default:
373                 errorcall(call,"invalid \"log=%s\"
specification\n",*p);
374             }
375             p++;

The type of *p is char which doesn't match the %s specification,
either use %c with *p or use %s with p for example:

       errorcall( call, "invalid \"log=%c\"
specification\n", *p );

Hope this hasn't been fixed already, I installed the SRPM from RedHat
so everyone else is probably ahead of me. When I use the correct
log="xy"
parameter for the plot function, logarithmic plotting is working correctly.
Yes I admit that I found the documentation for plot.default after I tried
a bunch of other things and traced through the code. There is nothing wrong
with your documentation, it's just me.

	- Tel
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hi

> I get a segfault from:
>
> R> plot( x, y, log="does this work?" )
>
> [telford@faraday ring-core]$ R --version
> Version 0.64.2  (July 3, 1999)
> Copyright (C) 1999 R Development Core Team
>
> R is free software and comes with ABSOLUTELY NO WARRANTY.
> You are welcome to redistribute it under the terms of the
> GNU General Public License.  For more information about
> these matters, see http://www.gnu.org/copyleft/gpl.html.
>
> (gdb) up
> #3  0x80927c2 in do_plot_window (call=0x40269760, op=0x4025ceac,
>     args=0x4060f428, env=0x4060f400) at plot.c:373
> 373                 errorcall(call,"invalid \"log=%s\"
specification\n",*p);
>
> (gdb) list
> 371                 break;
> 372             default:
> 373                 errorcall(call,"invalid \"log=%s\"
specification\n",*p);
> 374             }
> 375             p++;
>
> The type of *p is char which doesn't match the %s specification,
> either use %c with *p or use %s with p for example:
>
>        errorcall( call, "invalid \"log=%c\"
specification\n", *p );
>
> Hope this hasn't been fixed already, I installed the SRPM from RedHat
> so everyone else is probably ahead of me.

thanks, but this has been fixed :)

0.64.2 is pretty old now;  the latest version (0.99.0) has lots more in it,
including changes to the contour() and persp() functions you asked about in
a previous email.

You also mentioned the GNU libplot library;  0.99.0 has some vector font
stuff from the GNU libplot library in it, but none of the device-driver
stuff.

paul



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