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Transcript
Macros Data Tables Arrays Macros • VBA user subroutine to automate repetitive operations in excel • Keyboard shortcut: fast way to make the macro run (CTRL+ «letter») • Activate the macro • Attach macros to a button on the Ribbon or the Quick access toolbar Data tables • To do complex sensitivity analysis • One dimensional (one variable is changed) • Two dimensional (two variables are changed) • Put formulas on the top row and the variable we wish to vary in the column • Highlight the table area • Data/sensitivity analysis/ Data table • Select the cell input in row or in column Data Tables • Two dimensional (two variables are changed) • Upper left hand corner of the Table contains the formula • Two variables we wish to vary in the adjacent column and row Arrays, matrices • Row vector, column vector, matrix • Matrix operations (addition, scalar multiplication) • Transpose(matrix) • matrix multiplication: Mmult(matrix 1; matrix 2) • Inverse of a matrix: Minverse(matrix) • CTRL+SHIFT+ENTER Solving systems of symultaneous linear equations • • • • Ax=b A matrix of coefficients x=vector of unknowns b=vector of constants
