c# - How Can I get a 0 Neutral in my Y Axis all the time like what ever value it takes? - 


getmaximum = gain.max(); <-- list of value numbers random takes out maximum getminumumval = gain.min(); <-- takes out minimum  xaxisscale = gaincounter;     if (xaxisscale % 10 != 0) {     xaxisscale = (xaxisscale - xaxisscale % 10) + 10; <-- round off nearest highest 10th }                intervalxaxis = xaxisscale / 5; <-- divide interval 5  //------------- y axis ---- needs 0 neutral ----- //  if(getminumumval > -40) {     getminumumval = -40;     converttopos = -40; <-- default lowest -40 } else {     if (getminumumval % 10 != 0)     {         getminumumval = (getminumumval - getminumumval % 10) - 10;     }     converttopos = convert.toint32(getminumumval) * -1; }  //-------------//  if(getmaximum > 60)  {                        getmaximum = gain.max();      if (getmaximum % 10 != 0)     {         getmaximum = (getmaximum - getmaximum % 10) + 10;     } } else {     getmaximum = 60; <-- default highest 60 } getinterval = (convert.toint32(getmaximum) + converttopos) / 10;    <--  divide 10 need have 0 neutral on it?? problem  trade_analyzer_panel.chart1a.chartareas.add("area1a");             trade_analyzer_panel.chart1a.titles.add("gain / loss product xyz");// trade_analyzer_panel.chart1a.series.add("gain/loss"); trade_analyzer_panel.chart1a.legends.add("gain/loss");  trade_analyzer_panel.chart1a.series["gain/loss"].charttype = system.windows.forms.datavisualization.charting.seriescharttype.column;  count = 0; (int = 0; < trade_analyzer_panel.datagridview1.rows.count - 1; i++) {     trade_analyzer_panel.chart1a.series["gain/loss"].color = color.blue;         //trade_analyzer_panel.chart1a.series["gain/loss"].points[count].axislabel = convert.toint32(gain[count]).tostring();     trade_analyzer_panel.chart1a.series["gain/loss"].points.addxy(count, convert.toint32(gain[count]));                      count++; }  // -------- horizontal ---------- //  trade_analyzer_panel.chart1a.chartareas["area1a"].axisx.minimum = 1; trade_analyzer_panel.chart1a.chartareas["area1a"].axisx.maximum = xaxisscale; trade_analyzer_panel.chart1a.chartareas["area1a"].axisx.interval = 5; //intervalxaxis;  // -------- vertical ---------- //  trade_analyzer_panel.chart1a.chartareas["area1a"].axisy.minimum = convert.toint32(getminumumval); trade_analyzer_panel.chart1a.chartareas["area1a"].axisy.maximum = convert.toint32(getmaximum); trade_analyzer_panel.chart1a.chartareas["area1a"].axisy.interval = 20; trade_analyzer_panel.chart1a.chartareas["area1a"].axisx.scrollbar.buttonstyle = system.windows.forms.datavisualization.charting.scrollbarbuttonstyles.smallscroll; trade_analyzer_panel.chart1a.chartareas["area1a"].axisx.majorgrid.enabled = false;  // set view range [0,max] trade_analyzer_panel.chart1a.chartareas["area1a"].axisx.minimum = 0; trade_analyzer_panel.chart1a.chartareas["area1a"].axisx.maximum = xaxisscale;  // enable autoscroll trade_analyzer_panel.chart1a.chartareas["area1a"].cursorx.autoscroll = true;  // let's zoom [0,blocksize] (e.g. [0,5]) trade_analyzer_panel.chart1a.chartareas["area1a"].axisx.scaleview.zoomable = true; trade_analyzer_panel.chart1a.chartareas["area1a"].axisx.scaleview.sizetype = system.windows.forms.datavisualization.charting.datetimeintervaltype.number;  trade_analyzer_panel.chart1a.chartareas["area1a"].axisx.scaleview.zoom(0, 5);  // disable zoom-reset button (only scrollbar's arrows available) trade_analyzer_panel.chart1a.chartareas["area1a"].axisx.scrollbar.buttonstyle = system.windows.forms.datavisualization.charting.scrollbarbuttonstyles.smallscroll;  // set scrollbar small change blocksize (e.g. 100) trade_analyzer_panel.chart1a.chartareas["area1a"].axisx.scaleview.smallscrollsize = 100;

should use interval on this? or idea how can 0 neutral highest , lowest value of y axis in chart.. need bad got runned out of ideas sorry

example:

60

40

20

0

-20

-40

but if example lower gets -70 looks this:

50

30

10

-10

-30

-50

-70

how can neutral 0 on no matter how changes are?

note vertical interval 20 

trade_analyzer_panel.chart1a.chartareas["area1a"].axisy.interval = 20;

this means steps axis lowest value plus multiples of 20. 0 on 1 of steps if bottom value multiple of 20. may work is

if(getminumumval > -40) {     getminumumval = -40;     converttopos = -40; <-- default lowest -40 } else {     if (getminumumval % 20 != 0)     {         getminumumval = (getminumumval - getminumumval % 20) - 20;     }     converttopos = convert.toint32(getminumumval) * -1; }

using 20 rather 10.

note modulus operator % behaves strangely negative numbers see http://en.wikipedia.org/wiki/modulo_operation. if x negative x % 20 negative number. may find things easier use math.floor(getminumumval / 20)*20 smallest multiple of 20 less getminumumval.


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