diff --git a/src/samplepack.cpp b/src/samplepack.cpp
new file mode 100644
--- /dev/null
+++ b/src/samplepack.cpp
@@ -0,0 +1,88 @@
+/*
+  Copyright © 2018 Hasan Yavuz Özderya
+
+  This file is part of serialplot.
+
+  serialplot is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  serialplot is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with serialplot.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <QtGlobal>
+
+#include "samplepack.h"
+
+SamplePack::SamplePack(unsigned ns, unsigned nc, bool x)
+{
+    Q_ASSERT(ns > 0 && nc > 0);
+
+    _numSamples = ns;
+    _numChannels = nc;
+
+    _yData = new double[_numSamples * _numChannels]();
+    if (x)
+    {
+        _xData = new double[_numSamples]();
+    }
+    else
+    {
+        _xData = nullptr;
+    }
+}
+
+SamplePack::~SamplePack()
+{
+    delete[] _yData;
+    if (_xData != nullptr)
+    {
+        delete[] _xData;
+    }
+}
+
+bool SamplePack::hasX() const
+{
+    return _xData != nullptr;
+}
+
+unsigned SamplePack::numChannels() const
+{
+    return _numChannels;
+}
+
+unsigned SamplePack::numSamples() const
+{
+    return _numSamples;
+}
+
+double* SamplePack::xData() const
+{
+    Q_ASSERT(_xData != nullptr);
+
+    return _xData;
+}
+
+double* SamplePack::data(unsigned channel) const
+{
+    Q_ASSERT(channel < _numChannels);
+
+    return &_yData[channel * _numSamples];
+}
+
+double* SamplePack::xData()
+{
+    return const_cast<double*>(static_cast<const SamplePack&>(*this).xData());
+}
+
+double* SamplePack::data(unsigned channel)
+{
+    return const_cast<double*>(static_cast<const SamplePack&>(*this).data(channel));
+}