gnuplot/gnuplot-4.6.0-demo.diff

---
 demo/fit.dem    |    4 ++++
 demo/poldat.dem |    2 +-
 demo/simple.dem |    3 +--
 src/show.c      |    9 +++++++++
 src/variable.c  |   20 +++++++++++++++++++-
 5 files changed, 34 insertions(+), 4 deletions(-)

--- demo/fit.dem
+++ demo/fit.dem	2018-05-07 07:11:51.433579608 +0000
@@ -10,6 +10,7 @@ set dummy x, y
 
 print "Some examples how data fitting using nonlinear least squares fit can be done."
 print ''
+logfile = "`mktemp /tmp/fit.log.XXXXXX`"
 
 print "We fit a straight line to the data -- only as a demo without physical meaning."
 l(x) = y0 + m*x
@@ -29,6 +30,7 @@ set title 'data set and initial paramete
 plot 'lcdemo.dat', l(x)
 pause -1 "Now start fitting...  (-> return)"
 
+set fit logfile logfile
 fit l(x) 'lcdemo.dat' via y0, m
 set title 'unweighted fit'
 plot 'lcdemo.dat', l(x)
@@ -324,6 +326,7 @@ print '     "fit3.dat" u 1:2:3:4 via a0,
 pause -1 "Press enter to proceed with the next example."
 
 reset
+set fit logfile logfile
 print "\n"
 print "The fit command can handle errors in the independent variable, too."
 print "The problem shown here is Pearson's data with York's weights.\n"
@@ -429,6 +432,7 @@ print "to time."
 print ''
 pause -1 "Done with fitting demo  (-> return)"
 reset
+set fit logfile logfile
 set encoding myencoding
 # release datablock
 undefine $PearsonYork
--- demo/poldat.dem
+++ demo/poldat.dem	2018-05-07 07:11:51.433579608 +0000
@@ -11,7 +11,7 @@ unset grid
 unset polar
 set title "Primitive Smith Chart"
 unset key
-set xlabel "Impedance or Admittance Coordinates"
+set xlabel "Impedance or Admittance Coordinates" offset 12,-1
 set para
 set rrange [-0 : 10]
 set trange [-pi : pi]
--- demo/simple.dem
+++ demo/simple.dem	2018-05-07 07:11:51.433579608 +0000
@@ -8,14 +8,13 @@
 #
 set title "Simple Plots" font ",20"
 set key left box
-set samples 50
+set samples 400
 set style data points
 
 plot [-10:10] sin(x),atan(x),cos(atan(x))
 pause -1 "Hit return to continue"
 
 set key right nobox
-set samples 100
 plot [-pi/2:pi] cos(x),-(sin(x) > sin(x+1) ? sin(x) : sin(x+1))
 pause -1 "Hit return to continue"
 
--- src/show.c
+++ src/show.c	2018-05-07 07:11:51.437579533 +0000
@@ -1082,6 +1082,15 @@ show_version(FILE *fp)
 	    p 			/* type "help seeking-assistance" */
 	    );
 
+#ifdef GNUPLOT_LIB_DEFAULT
+   {
+	struct stat st;
+	if ((stat(GNUPLOT_LIB_DEFAULT, &st) == 0) && S_ISDIR(st.st_mode)) {
+	    fprintf(fp, "%s\n%s\tType `load \"all.dem\"` to display a large number of examples.", p, p);
+	    fprintf(fp, "\n%s\tThey are located at %s/*\n%s\n", p, GNUPLOT_LIB_DEFAULT, p);
+	}
+   }
+#endif
 
     /* show version long */
     if (almost_equals(c_token, "l$ong")) {
--- src/variable.c
+++ src/variable.c	2018-05-07 07:11:51.437579533 +0000
@@ -37,7 +37,10 @@ static char *RCSid() { return RCSid("$Id
 /* The Death of Global Variables - part one. */
 
 #include <string.h>
-
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
 #include "variable.h"
 
 #include "alloc.h"
@@ -98,6 +101,17 @@ loadpath_handler(int action, char *path)
 	if (!loadpath)
 	{
 	    char *envlib = getenv("GNUPLOT_LIB");
+#ifdef GNUPLOT_LIB_DEFAULT
+	    char *defenvlib = (char*)0;
+	    struct stat st;
+	    if ((stat(GNUPLOT_LIB_DEFAULT, &st) == 0) && S_ISDIR(st.st_mode)) {
+		if (envlib) {
+		    if (asprintf(&defenvlib, "%s:%s", envlib, GNUPLOT_LIB_DEFAULT) > 0)
+			envlib = defenvlib;
+		} else
+		    envlib = GNUPLOT_LIB_DEFAULT;
+	    }
+#endif /* GNUPLOT_LIB_DEFAULT */
 	    if (envlib) {
 		int len = strlen(envlib);
 		loadpath = gp_strdup(envlib);
@@ -106,6 +120,10 @@ loadpath_handler(int action, char *path)
 		/* convert all PATHSEPs to \0 */
 		PATHSEP_TO_NUL(loadpath);
 	    }			/* else: NULL = empty */
+#ifdef GNUPLOT_LIB_DEFAULT
+	    if (defenvlib)
+		free(defenvlib);
+#endif /* GNUPLOT_LIB_DEFAULT */
 	}			/* else: already initialised; int_warn (?) */
 	/* point to env portion of loadpath */
 	envptr = loadpath;