Package: qtiplot Version: 0.9.8.9-10 On systems that limit the stack space per user, the current implementation of correlation causes a stack overflow for large tables, say 1e6 rows. Otherwise this amount of rows is handled well by Qtiplot.
The attached patch solves the problem, albeit you may want to implement it differently. Upstream (www.qtiplot.com) does not accept patches anymore
--- qtiplot-0.9.8.9/qtiplot/src/analysis/Correlation.cpp 2015-11-04
11:36:44.139928471 +0100
+++ qtiplot-0.9.8.9/qtiplot/src/analysis/Correlation.cpp 2015-11-04
11:44:03.501165132 +0100
@@ -150,21 +150,22 @@
if (d_n > d_table->numRows())
d_table->setNumRows(d_n);
int cols = d_table->numCols();
int cols2 = cols+1;
d_table->addCol();
d_table->addCol();
int n = d_n/2;
- double x_temp[d_n], y_temp[d_n];
+ double *x_temp = new double[d_n];
+ double *y_temp = new double[d_n];
for (int i = 0; i<d_n; i++){
double x = i - n;
x_temp[i] = x;
double y;
if(i < n)
y = d_x[n + i];
else
y = d_x[i - n];
y_temp[i] = y;
@@ -185,11 +186,13 @@
if (d_graphics_display){
if (!d_output_graph)
createOutputGraph();
DataCurve *c = new DataCurve(d_table, d_table->colName(cols),
d_table->colName(cols2));
c->setData(x_temp, y_temp, d_n);
c->setPen(QPen(d_curveColor, 1));
d_output_graph->insertPlotItem(c, Graph::Line);
d_output_graph->updatePlot();
}
+ delete[] x_temp;
+ delete[] y_temp;
}
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