diff --git a/utils/Makefile.am b/utils/Makefile.am
index 660649d..70c1b87 100644
--- a/utils/Makefile.am
+++ b/utils/Makefile.am
@@ -12,6 +12,7 @@ bin_PROGRAMS =            \
     latan-sample-element  \
     latan-sample-fake     \
     latan-sample-ft       \
+    latan-sample-merge    \
     latan-sample-plot     \
     latan-sample-plot-corr\
     latan-sample-read     \
@@ -37,6 +38,10 @@ latan_sample_ft_SOURCES  = sample-ft.cpp
 latan_sample_ft_CXXFLAGS = $(COM_CXXFLAGS)
 latan_sample_ft_LDFLAGS  = -L../lib/.libs -lLatAnalyze
 
+latan_sample_merge_SOURCES  = sample-merge.cpp
+latan_sample_merge_CXXFLAGS = $(COM_CXXFLAGS)
+latan_sample_merge_LDFLAGS  = -L../lib/.libs -lLatAnalyze
+
 latan_sample_plot_corr_SOURCES  = sample-plot-corr.cpp
 latan_sample_plot_corr_CXXFLAGS = $(COM_CXXFLAGS)
 latan_sample_plot_corr_LDFLAGS  = -L../lib/.libs -lLatAnalyze
diff --git a/utils/sample-merge.cpp b/utils/sample-merge.cpp
new file mode 100644
index 0000000..11c2e87
--- /dev/null
+++ b/utils/sample-merge.cpp
@@ -0,0 +1,94 @@
+/*
+ * sample-merge.cpp, part of LatAnalyze 3
+ *
+ * Copyright (C) 2013 - 2020 Antonin Portelli
+ *
+ * LatAnalyze 3 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.
+ *
+ * LatAnalyze 3 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 LatAnalyze 3.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <LatAnalyze/Core/OptParser.hpp>
+#include <LatAnalyze/Io/Io.hpp>
+
+using namespace std;
+using namespace Latan;
+
+int main(int argc, char *argv[])
+{
+    // argument parsing ////////////////////////////////////////////////////////
+    OptParser      opt;
+    bool           parsed;
+    string         outFileName = "";
+    vector<string> fileName;
+    unsigned int   n = 0;
+
+    opt.addOption("o", "output", OptParser::OptType::value  , true,
+                  "output file name (default: result not saved)");
+    opt.addOption("" , "help"  , OptParser::OptType::trigger, true,
+                  "show this help message and exit");
+    parsed = opt.parse(argc, argv);
+    if (!parsed or (opt.getArgs().size() < 1) or opt.gotOption("help"))
+    {
+        cerr << "usage: " << argv[0];
+        cerr << " <sample 1> ... <sample n>" << endl;
+        cerr << endl << "Possible options:" << endl << opt << endl;
+        
+        return EXIT_FAILURE;
+    }
+    n           = opt.getArgs().size();
+    outFileName = opt.optionValue("o");
+    for (unsigned int i = 0; i < n; ++i)
+    {
+        fileName.push_back(opt.getArgs()[i]);
+    }
+
+    // figure out dimensions ///////////////////////////////////////////////////
+    Index      nCol, nSample, totRows;
+    DMatSample buf;
+
+    buf     = Io::load<DMatSample>(fileName[0]);
+    nSample = buf.size();
+    totRows = buf[central].rows();
+    nCol    = buf[central].cols();
+    for (unsigned int i = 1; i < n; ++i)
+    {
+        buf = Io::load<DMatSample>(fileName[i]);
+        if (buf.size() != nSample)
+        {
+            LATAN_ERROR(Size, "sample size mismatch");
+        }
+        if (buf[central].cols() != nCol)
+        {
+            LATAN_ERROR(Size, "column size mismatch");
+        }
+        totRows += buf[central].rows();
+    }
+
+    // merge along rows ////////////////////////////////////////////////////////
+    DMatSample out(nSample, totRows, nCol);
+    Index      rowo = 0, r;
+
+    for (unsigned int i = 0; i < n; ++i)
+    {
+        buf = Io::load<DMatSample>(fileName[i]);
+        r   = buf[central].rows();
+        out.block(rowo, 0, r, nCol) = buf;
+        rowo += r;
+    }
+    if (!outFileName.empty())
+    {
+        Io::save<DMatSample>(out, outFileName);
+    }
+
+    return EXIT_SUCCESS;
+}
\ No newline at end of file