diff --git a/QLop.pro b/QLop.pro
--- a/QLop.pro
+++ b/QLop.pro
@@ -14,6 +14,8 @@ DESTDIR =./bin
 TARGET = QLop
 TEMPLATE = app
 
+LIBS+=-lfftw3
+
 INCLUDEPATH += src/QCustomPlot \
                 src src/Cassini \
                 src/Core src/Core/Widgets \
diff --git a/src/Cassini/cassinitools.cpp b/src/Cassini/cassinitools.cpp
--- a/src/Cassini/cassinitools.cpp
+++ b/src/Cassini/cassinitools.cpp
@@ -2,12 +2,14 @@
 #include <qlopplots.h>
 #include <QPen>
 #include <QAction>
+#include <fftw3.h>
 
 CassiniTools* CassiniTools::_self=NULL;
 QDockWidget* CassiniTools::m_gui=NULL;
 CassiniToolsGUI* CassiniTools::m_CassiniToolsGUI=NULL;
 CassiniDataFile* CassiniTools::m_dataFile=NULL;
 int CassiniTools::m_defaultPlot=-1;
+int CassiniTools::m_fftPlot=-1;
 
 Qt::GlobalColor QLopColours[]= {Qt::black,
                                 Qt::red,
@@ -48,6 +50,7 @@ CassiniTools::~CassiniTools()
 void CassiniTools::makePlot()
 {
     m_defaultPlot = QLopPlots::addPlot();
+    m_fftPlot = QLopPlots::addPlot();
     SocExplorerPlot* plot=QLopPlots::getPlot(m_defaultPlot);
     if(plot)
     {
@@ -58,6 +61,9 @@ void CassiniTools::makePlot()
         SocExplorerPlotActions* action=new SocExplorerPlotActions("export view",plot->PID(),_self);
         plot->addAction(action);
         QObject::connect(action,SIGNAL(triggered(int)),_self,SLOT(export_view(int)));
+        action=new SocExplorerPlotActions("FFT of the current view",plot->PID(),_self);
+        plot->addAction(action);
+        QObject::connect(action,SIGNAL(triggered(int)),_self,SLOT(compute_fft_on_view(int)));
     }
 }
 
@@ -83,19 +89,19 @@ void CassiniTools::decodeFGMData(const Q
 
 void CassiniTools::plotFile(const QString &File)
 {
-  if(!m_dataFile->isRunning())
+    if(!m_dataFile->isRunning())
     {
-      m_dataFile->parseFile(File);
-      // TODO fixme
-      SocExplorerPlot* plot = QLopPlots::getPlot(m_defaultPlot);
-      if(plot==NULL)
-      {
-        makePlot();
-        plot = QLopPlots::getPlot(m_defaultPlot);
-      }
-      if(plot)
-          plot->setTitle(File);
-  }
+        m_dataFile->parseFile(File);
+        // TODO fixme
+        SocExplorerPlot* plot = QLopPlots::getPlot(m_defaultPlot);
+        if(plot==NULL)
+        {
+            makePlot();
+            plot = QLopPlots::getPlot(m_defaultPlot);
+        }
+        if(plot)
+            plot->setTitle(File);
+    }
 }
 
 void CassiniTools::plot_TAB_File(const QString &fileName)
@@ -125,6 +131,76 @@ void CassiniTools::export_view(int PID)
     }
 }
 
+void CassiniTools::compute_fft_on_view(int PID)
+{
+    SocExplorerPlot* plot = QLopPlots::getPlot(PID);
+    if(plot==NULL)
+        return;
+    {
+        QLopDataList vectors;
+        for(int i=0;i<plot->graphCount();i++)
+        {
+            QLopData* vect = new QLopData();
+            vect->data = plot->getVisibleData(i);
+            vectors.append(vect);
+        }
+        if(vectors.count()==3)
+        {
+            QLopData* ch1V=vectors.at(0);
+            QLopData* ch2V=vectors.at(1);
+            QLopData* ch3V=vectors.at(2);
+            QLopData* FFTout=new QLopData();
+            if(ch1V->data->count()==ch2V->data->count() && ch1V->data->count()==ch3V->data->count())
+            {
+
+                double* in;
+                fftw_complex *out;
+                fftw_plan p;
+                FFTout->data = new QVector<QCPData>(ch1V->data->count()/2);
+                in = (double*) fftw_malloc(sizeof(double) * ch1V->data->count());
+                out = (fftw_complex*) fftw_malloc(sizeof(fftw_complex) * ch1V->data->count());
+                double av=0;
+                for(int i=0;i<ch1V->data->count();i++)
+                {
+                    in[i]=sqrt((ch1V->data->at(i).value*ch1V->data->at(i).value) + (ch2V->data->at(i).value*ch2V->data->at(i).value) + (ch3V->data->at(i).value*ch3V->data->at(i).value));
+                    av = av+in[i];
+                }
+                av/=ch1V->data->count();
+                for(int i=0;i<ch1V->data->count();i++)
+                {
+                    in[i]=in[i]-av;
+                }
+                p = fftw_plan_dft_r2c_1d(ch1V->data->count(),in, out,FFTW_ESTIMATE);
+                fftw_execute(p); /* repeat as needed */
+                fftw_destroy_plan(p);
+                fftw_free(in);
+                for(int i=0;i<ch1V->data->count()/2;i++)
+                {
+//                    (*FFTout->data)[i].value=sqrt((out[i][0] * out[i][0]) + (out[i][1] * out[i][1]))/ch1V->data->count();
+                    (*FFTout->data)[i].value=((out[i][0] * out[i][0]) + (out[i][1] * out[i][1]))/(ch1V->data->count());
+                    (*FFTout->data)[i].key = i;
+                }
+                fftw_free(out);
+                SocExplorerPlot* plot = QLopPlots::getPlot(m_fftPlot);
+                if(plot==NULL)
+                    return;
+                plot->removeAllGraphs();
+                plot->addGraph();
+                plot->setXaxisLog();
+                plot->setYaxisLog();
+                plot->setAdaptativeSampling(0,true);
+                QPen pen = plot->getGraphPen(0);
+                pen.setColor(QLopColours[0%QLopColoursCount]);
+                plot->setGraphPen(0,pen);
+                plot->setGraphData(0,FFTout->data,false);
+                plot->rescaleAxis();
+                plot->replot();
+
+            }
+        }
+    }
+}
+
 QDockWidget *CassiniTools::getGUI()
 {
     if(!m_noGui && (m_gui==NULL))
@@ -148,25 +224,25 @@ void CassiniTools::dataReady(QLopDataLis
     SocExplorerPlot* plot = QLopPlots::getPlot(m_defaultPlot);
     if(plot==NULL)
     {
-      makePlot();
-      plot = QLopPlots::getPlot(m_defaultPlot);
+        makePlot();
+        plot = QLopPlots::getPlot(m_defaultPlot);
     }
     if(plot)
     {
-    plot->removeAllGraphs();
-    for(int i=0;i<data.count();i++)
-      {
-        plot->addGraph();
-        plot->setAdaptativeSampling(i,true);
-        plot->setUseFastVector(i,true);
-        QPen pen = plot->getGraphPen(i);
-        pen.setColor(QLopColours[i%QLopColoursCount]);
-        plot->setGraphPen(i,pen);
-        plot->setGraphName(i,data.at(i)->name+"("+data.at(i)->unit+")");
-        plot->setGraphData(i,data.at(i)->data,false);
-      }
-    plot->rescaleAxis();
-    plot->replot();
+        plot->removeAllGraphs();
+        for(int i=0;i<data.count();i++)
+        {
+            plot->addGraph();
+            plot->setAdaptativeSampling(i,true);
+            plot->setUseFastVector(i,true);
+            QPen pen = plot->getGraphPen(i);
+            pen.setColor(QLopColours[i%QLopColoursCount]);
+            plot->setGraphPen(i,pen);
+            plot->setGraphName(i,data.at(i)->name+"("+data.at(i)->unit+")");
+            plot->setGraphData(i,data.at(i)->data,false);
+        }
+        plot->rescaleAxis();
+        plot->replot();
     }
 }
 
diff --git a/src/Cassini/cassinitools.h b/src/Cassini/cassinitools.h
--- a/src/Cassini/cassinitools.h
+++ b/src/Cassini/cassinitools.h
@@ -17,7 +17,7 @@ private:
     static QDockWidget* m_gui;
     static CassiniToolsGUI* m_CassiniToolsGUI;
     static CassiniDataFile* m_dataFile;
-    static int m_defaultPlot;
+    static int m_defaultPlot,m_fftPlot;
     CassiniTools(bool noGUI=false, QObject *parent=0);
     ~CassiniTools();
     static void makePlot();
@@ -32,6 +32,7 @@ public:
 public slots:
     void plot_TAB_File(const QString& fileName);
     void export_view(int PID);
+    void compute_fft_on_view(int PID);
 private slots:
     void dataReady(QLopDataList data);
 };
diff --git a/src/Core/Widgets/qcustomplotvect.cpp b/src/Core/Widgets/qcustomplotvect.cpp
--- a/src/Core/Widgets/qcustomplotvect.cpp
+++ b/src/Core/Widgets/qcustomplotvect.cpp
@@ -48,7 +48,7 @@ QCPGraphVect::QCPGraphVect(QCPAxis *keyA
 
 QCPGraphVect::~QCPGraphVect()
 {
-
+    delete mData;
 }
 
 void QCPGraphVect::setData(QVector<QCPData> *data)
diff --git a/src/Core/qlopdata.cpp b/src/Core/qlopdata.cpp
--- a/src/Core/qlopdata.cpp
+++ b/src/Core/qlopdata.cpp
@@ -7,6 +7,6 @@ QLopData::QLopData(QObject *parent) : QO
 
 QLopData::~QLopData()
 {
-
+    delete data;
 }
 
diff --git a/src/SocExplorerPlot.cpp b/src/SocExplorerPlot.cpp
--- a/src/SocExplorerPlot.cpp
+++ b/src/SocExplorerPlot.cpp
@@ -111,13 +111,23 @@ void SocExplorerPlot::setTitle(QString t
 void SocExplorerPlot::setXaxisLabel(QString label)
 {
   this->m_plot->xAxis->setLabel(label);
-  this->repaint();
+    this->repaint();
+}
+
+void SocExplorerPlot::setXaxisLog()
+{
+    this->m_plot->xAxis->setScaleType(QCPAxis::stLogarithmic);
 }
 
 void SocExplorerPlot::setYaxisLabel(QString label)
 {
   this->m_plot->yAxis->setLabel(label);
-  this->repaint();
+    this->repaint();
+}
+
+void SocExplorerPlot::setYaxisLog()
+{
+    this->m_plot->yAxis->setScaleType(QCPAxis::stLogarithmic);
 }
 
 void SocExplorerPlot::setXaxisRange(double lower, double upper)
diff --git a/src/SocExplorerPlot.h b/src/SocExplorerPlot.h
--- a/src/SocExplorerPlot.h
+++ b/src/SocExplorerPlot.h
@@ -64,8 +64,10 @@ public:
   ~SocExplorerPlot();
     void setTitle(QString title);
     void setXaxisLabel(QString label);
+    void setXaxisLog();
     void setXaxisRange(double lower, double upper);
     void setYaxisLabel(QString label);
+    void setYaxisLog();
     void setYaxisRange(double lower, double upper);
     void rescaleAxis();
     void setLegendFont(QFont font);