Method toString

src/danfojs-base/core/frame.ts:425–512

* Prints DataFrame to console as a formatted grid of row and columns.

()

     * Prints DataFrame to console as a formatted grid of row and columns.
    */
    toString(): string {
        const maxRow = this.config.getMaxRow;
        const maxColToDisplayInConsole = this.config.getTableMaxColInConsole;

        // let data;
        const dataArr: ArrayType2D = [];
        const colLen = this.columns.length;

        let header = [];

        if (colLen > maxColToDisplayInConsole) {
            //truncate displayed columns to fit in the console
            let firstFourcolNames = this.columns.slice(0, 4);
            let lastThreecolNames = this.columns.slice(colLen - 3);
            //join columns with truncate ellipse in the middle
            header = ["", ...firstFourcolNames, "...", ...lastThreecolNames];

            let subIdx: Array<number | string>
            let firstHalfValues: ArrayType2D
            let lastHalfValueS: ArrayType2D

            if (this.values.length > maxRow) {
                //slice Object to show [max_rows]
                let dfSubset1 = this.iloc({
                    rows: [`0:${maxRow}`],
                    columns: ["0:4"]
                });

                let dfSubset2 = this.iloc({
                    rows: [`0:${maxRow}`],
                    columns: [`${colLen - 3}:`]
                });

                subIdx = this.index.slice(0, maxRow);
                firstHalfValues = dfSubset1.values as ArrayType2D
                lastHalfValueS = dfSubset2.values as ArrayType2D

            } else {
                let dfSubset1 = this.iloc({ columns: ["0:4"] });
                let dfSubset2 = this.iloc({ columns: [`${colLen - 3}:`] });

                subIdx = this.index.slice(0, maxRow);
                firstHalfValues = dfSubset1.values as ArrayType2D
                lastHalfValueS = dfSubset2.values as ArrayType2D
            }

            // merge subset 
            for (let i = 0; i < subIdx.length; i++) {
                const idx = subIdx[i];
                const row = [idx, ...firstHalfValues[i], "...", ...lastHalfValueS[i]]
                dataArr.push(row);
            }

        } else {
            //display all columns
            header = ["", ...this.columns]
            let subIdx
            let values: ArrayType2D