logarithm scale issue

[Celine Gestas]

Hi all,

I am working on displaying a logarithm scale on xAxis but I have the
following error :
 " Single DisplayRealType DisplayXAxis occurs more than once:
ShadowType.testIndices"

and I don't understand why... I get X and Y values from a Class but I d like
to have a logarithm scale just for the xAxis.

My code is :

float xMin, xMax, yMax;
        xMax = getMax(_linePlot.getValues(xAxis));
        xMin = getMin(_linePlot.getValues(xAxis));

        yMax = getMax(_linePlot.getValues((String)yAxis.get(0)));
        for(i=1; i<yAxis.size(); i++) {
            if (getMax(_linePlot.getValues((String)yAxis.get(i))) > yMax)
                yMax = getMax(_linePlot.getValues((String)yAxis.get(i)));
        }

        /*************************/
        /* Create the quantities */
        /*************************/

        // create the ScalarMaps : quantity x is to be _displayed along
XAxis and y along YAxis
        RealType x = RealType.getRealType(xAxis);
        xMap = new ScalarMap( x, Display.XAxis );

        RealType y = RealType.getRealType("Y");
        yMap = new ScalarMap( y, Display.YAxis );
        yMap.setScaleEnable(true);
        yMap.setRange(0, yMax);

        CoordinateSystem logCoord = new LogCoordinateSystem(new
RealTupleType(x));
        RealTupleType logX = new RealTupleType(x, logCoord, null);

        // add them to the display
        _display.addMap( xMap );
        _display.addMap( yMap );


        /*************************/
        /* Create the quantities */
        /*************************/

        // our actual x and y values
        float[][] x_vals  = _linePlot.getValues(xAxis);

        // rank the x values
        for( i = (x_vals[0].length - 1);  i > 0;  i--) {
            for( int j=0;  j < i; j++) {
                if (x_vals[0][j] > x_vals[0][j+1]) {
                    float L_iTemp= x_vals[0][j];
                    x_vals[0][j]= x_vals[0][j+1];
                    x_vals[0][j+1]= L_iTemp;
                }
            }
        }

        // create the index
        x_set = new Gridded1DSet(logX, x_vals, x_vals[0].length, logCoord,
null, null);

        float[][] y_vals = _linePlot.getValues((String) yAxis.get(i));

        /******************************/
        /* Code for setting LINE data */
        /******************************/

        // create the function to draw the line
        func_x_y = new FunctionType(logX, y);

        // associate the function (func_x_y) to the values (x_set)
        line_ff = new FlatField( func_x_y, x_set);

        // and put the y values above in it
        line_ff.setSamples( y_vals );


        /**************************/
        /* Initialize the display */
        /**************************/

        // create data references and set the FlatFields (association
function/values) as our datas
        line_ref = new DataReferenceImpl("line_ref");
        line_ref.setData( line_ff );

        _display.addReference( line_ref , lineCMap);

If someone could help me fixing this ....

Celine Gestas