fixes and performances improvement

src/PlotView/PlotView.ts

@@ -192,9 +192,9 @@ export default defineComponent({
 			}
 		},
 
-		occurrencesToMap(occurences: string[][]): Record<string, string[]> {
+		occurrencesToMap(occurrences: string[][]): Record<string, string[]> {
 			const map: Record<string, string[]> = {}
-			for(const row of occurences) {
+			for(const row of occurrences) {
 				const [window, patternId] = row
 				if(map[patternId] === undefined) {
 					map[patternId] = [ window ]
@@ -207,7 +207,7 @@ export default defineComponent({
 
 		async generateChartLabels(chartData: ChartElement[], dataset: Table) {
 			const patternOcc = this.patternsOcc
-			if(patternOcc) {
+			if(patternOcc && patternOcc.rowsStartingFrom1) {
 				const windowIntervals = this.windowToStepIntervals(dataset)
 				//todo search for the window columns
 				const firstRow = dataset.rowsStartingFrom1[0]

src/PlotView/PlotView.vue

@@ -44,7 +44,7 @@
 						v-model="selectedAnomalyPatterns"
 					/>
 				</div>
-				<div class="row">
+				<div class="row" v-if="patterns?.rowsStartingFrom1">
 
 					<label>Patterns</label>