Dataframe.rows

This function returns a specific number of rows of the dataframe, this function takes an object with either the start or the end index and return the dataframe with the specified number of rows

Parameter

• Indexer.start?: number - if provided, specifies the begin, or else default to the first row in the dataframe
• Indexer.end?: number - if provided, specifies the end, or else default to the last row in the dataframe

Returns

• Dataframe<T>

const first_four: Dataframe<T> = df.rows({ start: 0, end: 4 }); // first 4 rows

Let's say you want the dataframe to have the first 250 rows, making the value of end, 250 return the first 250 rows and omits the remaining, and intuitively changing the value of end, to n gives you n number of rows and omits the remaining and so on.

const first_250: Dataframe<T> = df.rows({ end: 250 });

const count: Dataframe<T> = df.rows({});