1 files changed, 9 insertions, 9 deletions
diff --git a/frontend/src/app/_data/Dataset.ts b/frontend/src/app/_data/Dataset.ts
index 4ff0a471..87b09c6f 100644
--- a/frontend/src/app/_data/Dataset.ts
+++ b/frontend/src/app/_data/Dataset.ts
@@ -29,15 +29,15 @@ export class ColumnInfo {
         public columnName: string = '',
         public isNumber: boolean = false,
         public numNulls: number = 0,
-        public uniqueValues?: string[],
-        public uniqueValuesCount?: number[],
-        public uniqueValuesPercent?: number[],
-        public median?: number,
-        public mean?: number,
-        public min?: number,
-        public max?: number,
-        public q1?: number,
-        public q3?: number,
+        public uniqueValues: string[]=[],
+        public uniqueValuesCount: number[]=[],
+        public uniqueValuesPercent: number[]=[],
+        public median: number=0,
+        public mean: number=0,
+        public min: number=0,
+        public max: number=0,
+        public q1: number=0,
+        public q3: number=0,
     ) {
         /*if (isNumber)
             this.columnType = ColumnType.numerical;