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  2. Pivot table - Wikipedia

    en.wikipedia.org/wiki/Pivot_table

    The fields that would be created will be visible on the right hand side of the worksheet. By default, the pivot table layout design will appear below this list. Pivot Table fields are the building blocks of pivot tables. Each of the fields from the list can be dragged on to this layout, which has four options: Filters; Columns; Rows; Values

  3. Column chromatography - Wikipedia

    en.wikipedia.org/wiki/Column_chromatography

    A chemist in the 1950s using column chromatography. The Erlenmeyer receptacles are on the floor. Column chromatography in chemistry is a chromatography method used to isolate a single chemical compound from a mixture. Chromatography is able to separate substances based on differential absorption of compounds to the adsorbent; compounds move ...

  4. Packed bed - Wikipedia

    en.wikipedia.org/wiki/Packed_bed

    A packed bed used to perform separation processes, such as absorption, stripping, and distillation is known as a packed column. [1] Columns used in certain types of chromatography consisting of a tube filled with packing material can also be called packed columns and their structure has similarities to packed beds.

  5. Row- and column-major order - Wikipedia

    en.wikipedia.org/wiki/Row-_and_column-major_order

    To use column-major order in a row-major environment, or vice versa, for whatever reason, one workaround is to assign non-conventional roles to the indexes (using the first index for the column and the second index for the row), and another is to bypass language syntax by explicitly computing positions in a one-dimensional array.

  6. Theoretical plate - Wikipedia

    en.wikipedia.org/wiki/Theoretical_plate

    In industrial continuous fractionating columns, N t is determined by starting at either the top or bottom of the column and calculating material balances, heat balances and equilibrium flash vaporizations for each of the succession of equilibrium stages until the desired end product composition is achieved.

  7. Matrix (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Matrix_(mathematics)

    A matrix with one column, sometimes used to represent a vector Square matrix: n × n [] A matrix with the same number of rows and columns, sometimes used to represent a linear transformation from a vector space to itself, such as reflection, rotation, or shearing.

  8. PnL explained - Wikipedia

    en.wikipedia.org/wiki/PnL_Explained

    Column 3: PnL unexplained – This is calculated as PnL minus PnL explained (i.e., column 1 minus column 2) Column 4: Impact of time – This is the PnL due to the change in time. Column 5: Impact of prices – This is the change in the value of a portfolio due to changes in commodity or equity/stock prices

  9. Matrix calculus - Wikipedia

    en.wikipedia.org/wiki/Matrix_calculus

    In mathematics, matrix calculus is a specialized notation for doing multivariable calculus, especially over spaces of matrices.It collects the various partial derivatives of a single function with respect to many variables, and/or of a multivariate function with respect to a single variable, into vectors and matrices that can be treated as single entities.