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graph: fix bar graph min/max displays
[fio.git]
/
graph.c
diff --git
a/graph.c
b/graph.c
index a0f1b056d696c6f979c9154c77e521812ea4c34a..3f2ee6aff2d6d35f5f505a0ef21c8c3bbb82969a 100644
(file)
--- a/
graph.c
+++ b/
graph.c
@@
-442,7
+442,14
@@
void bar_graph_draw(struct graph *bg, cairo_t *cr)
nlabels = count_labels(bg->labels);
space_per_label = (x2 - x1) / (double) nlabels;
nlabels = count_labels(bg->labels);
space_per_label = (x2 - x1) / (double) nlabels;
+ /*
+ * Start bars at 0 unless we have negative values, otherwise we
+ * present a skewed picture comparing label X and X+1.
+ */
mindata = find_min_data(bg->labels);
mindata = find_min_data(bg->labels);
+ if (mindata > 0)
+ mindata = 0;
+
maxdata = find_max_data(bg->labels);
if (fabs(maxdata - mindata) < 1e-20) {
maxdata = find_max_data(bg->labels);
if (fabs(maxdata - mindata) < 1e-20) {
@@
-452,8
+459,7
@@
void bar_graph_draw(struct graph *bg, cairo_t *cr)
return;
}
return;
}
- graph_draw_y_ticks(bg, cr, x1, y1, x2, y2, mindata, maxdata, 10, 1);
-
+ maxdata = graph_draw_y_ticks(bg, cr, x1, y1, x2, y2, mindata, maxdata, 10, 1);
i = 0;
for (lb = bg->labels; lb; lb = lb->next) {
int nvalues;
i = 0;
for (lb = bg->labels; lb; lb = lb->next) {
int nvalues;