fix: add last quantile class

public/attrinfo.html

@@ -407,9 +407,9 @@
                         break;
                     case 'quantile':
                         let percentileBreaks = globalStats.percentiles.reduce((result, percentile)=>{
-                            percentile.pcount = 1;
                             if (result.length === 0) {
                                 result.push(Object.assign({}, percentile)); // spread operator not supported by current Edge
+                                result[result.length - 1].pcount = 1;
                                 return result;
                             }
                             if (result[result.length - 1].to === percentile.from) {
@@ -419,6 +419,7 @@
                                 return result;
                             }
                             result.push(Object.assign({}, percentile)); 
+                            result[result.length - 1].pcount = 1;
                             return result;
                         },[]);
                         const legendType = (typeof percentileBreaks[0].from === "string") ? 'qual' : 'seq';
@@ -433,7 +434,7 @@
                             let sumClassCount = 0
                             percentileBreaks = percentileBreaks.reduce((result, percentile)=>{
                                 sumPCount += percentile.pcount;
-                                if (sumPCount >= sumClassCount * pCountPerClass && result.length < classCount) {
+                                if (sumPCount > sumClassCount * pCountPerClass && result.length < classCount) {
                                     // new class
                                     result.push(percentile);
                                     sumClassCount++;
@@ -506,7 +507,7 @@
                     </select><label for="numclasses">number of classes</label><br>
                     <button onclick="classButton('interval')">equal interval</button>
                     <button onclick="classButton('quantile')">quantile</button>
-                    <button onclick="classButton('qualitative')">qualitative</button><br>
+                    <button onclick="classButton('qualitative')">most frequent</button><br>
                     <input type="checkbox" id="hidenulls" name="hidenulls" checked><label for="hidenulls">Hide no-data</label>
                 </div>
             </div>