Excel commands calculation

The calculation of Fjo would be accomplished as before, using the Excel commands = B3 + C3. Then the remaining Fj values would be found by duplicating the formula for all subsequent cells. 

Computer Methods These methods are easily programmed in a spreadsheet program such as Microsoft Excel. In MATLAB, the trapezoid rule can be calculated by using the command trapz(x,y), where x is a vector of x values and y is a vector of values /(%.). Alternatively, use the commands... 

In Figure 1.18, isomer calculations are initiated by entering an orbit list into the input cells of the worksheet displayed. The action of the Calculate command button is to add a Decoration list keypad to the basic display as shown in the second diagram in the figure. As usual, for the purposes of ensuring compatibility with earlier versions of EXCEL , the keypad is modal [takes precedence over the underlying display, which is rendered inactive and inaccessible until control is transferred back from the active modal form] and a choice of decoration must be made before control is returned to the underlying worksheet. 

The problem table to find the minimum utility requirements and the pinch temperature can be built in a spreadsheet. The calculations in each cell are repetitive, and the formula can be copied from cell to cell using the cell copy commands. A spreadsheet template for the problem table algorithm is available in MS Excel format in the online material at http //books.elsevier.com/companions. The use of the spreadsheet is illustrated in Eigure 3.31 and described here. 

Do the calculation by hand or use a spreadsheet. The Goal Seek command in Excel carries out the Newton-Raphson method automatically. See Chapter 3. 

Note the manner of identification of the cells containing the fixed parameters p and Nr. EXCEL-based absolute referencing has been used in this instruction. The use of the character as a left-multiplier of a column or row address fixes that address in any further reference. Since much of the worksheet is constructed by using commands, which repeat a set of calculations for different parameter values, the device enables fixed values to remain fixed. Thus, to repeat this formula with fixed parameter values in other cells of column B we need absolute referencing. It is good practice, too, to identify the column containing the radial data absolutely, thus A. ... 

Both the inversion of a matrix and the multiplication of a vector by a matrix irrvolve a great plenty of elementary calculations, for which reason they are corrverriently achieved by a computer. Already general-use spreadsheet apphcatiorrs like Excel provide high-level commands MINV for matrix inversion and MMULT for matrix multiphcation. 

Note The required covariance matrix S in Eq. 21-27 can be calculated using either the cov command in MATLAB or the covar command in EXCEL. 

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