[goffice] Skip invalid data in probability plots.

[Jean Bréfort <jbrefort src gnome org>]

commit 0f591eb871fdc7a12a96d53f344b9646446274a4
Author: Jean Brefort <jean brefort normalesup org>
Date:   Fri Apr 23 17:34:46 2010 +0200

    Skip invalid data in probability plots.

 ChangeLog                                   |    5 +++++
 plugins/plot_distrib/gog-probability-plot.c |   14 ++++++++++++--
 2 files changed, 17 insertions(+), 2 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index beeb5c6..ff4f907 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2010-04-23  Jean Brefort  <jean brefort normalesup org>
+
+	* plugins/plot_distrib/gog-probability-plot.c
+	(gog_probability_plot_series_update): skip invalid data.
+
 2010-04-21  Morten Welinder  <terra gnome org>
 
 	* goffice/utils/datetime.c (go_date_weeknum): Return the Excel
diff --git a/plugins/plot_distrib/gog-probability-plot.c b/plugins/plot_distrib/gog-probability-plot.c
index 39a4308..57fc885 100644
--- a/plugins/plot_distrib/gog-probability-plot.c
+++ b/plugins/plot_distrib/gog-probability-plot.c
@@ -518,10 +518,20 @@ gog_probability_plot_series_update (GogObject *obj)
 	g_free (series->x);
 	series->x = NULL;
 	if (series->base.values[0].data != NULL) {
+		double *x;
+		unsigned i, max = 0;
 		x_vals = go_data_get_values (series->base.values[0].data);
 		series->base.num_elements = go_data_get_vector_size (series->base.values[0].data);
-		if (x_vals)
-			series->x = go_range_sort (x_vals, series->base.num_elements);
+		if (x_vals) {
+		x = g_new (double, series->base.num_elements);
+			for (i = 0; i < series->base.num_elements; i++) {
+				if (go_finite (x_vals[i]))
+				    x[max++] = x_vals[i];
+			}
+			series->base.num_elements = max;
+			series->x = go_range_sort (x, series->base.num_elements);
+			g_free (x);
+		}
 	}
 	mn = pow (0.5, 1. / series->base.num_elements);
 	d = series->base.num_elements + .365;