Pyspark, Finite Element Analysis, Mathematical Modeling, Databricks.
"node_row_index_for_n2") .orderBy("alpha") ) P_spark = (index_df .selectExpr("alpha", "node_row_index_n1 as row_index1", "node_row_index_n2 as row_index2", "node_column_index_n1 as column_index1", "node_column_index_n2 as column_index2", "n1", "n2") .withColumn("x1", expr(f"{left} + (column_index1