home *** CD-ROM | disk | FTP | other *** search
- 4.2 DIFERENTIATION
-
-
- Press <D> to brings the next menu:
-
- Function Data Help
-
-
- <F>unction
-
-
- Using this option the user can differentiate analytic functions. The
- function should be written using Lotus rules (built-in Lotus functions
- begin with the "@"character like @SIN(X) or the "+" or "-" sign).
-
- Press <f> to brings the next screen:
-
- ____________________________________________________________________________
-
- A B C D E
- 1 ====================================================================
- 2 Units | Output/Input | Memory |
- 3 ====================================================================
- 4 None | 0.00 | 0.00|
- 5 ====================================================================
- EV
- 1 @cos(var)-var
- 2
- 3
- 4
- 5
- 6
- 7
- 8 Input or edit the function as a FORMULA and press ENTER ....
- 9
- 10
- 11
- 12
- 13
- 14
- ____________________________________________________________________________
-
-
- The program is now in the Lotus EDIT mode, edit or type a function
- and than press the ENTER key or just press the ENTER key for no
- changes. When you are finished editing press ENTER to return to the
- previous menu.
-
-
- **** WARNING ****
-
- Since the program is in the EDIT mode the Lotus keys are operative,
- however the user is strongly advised to use ONLY the UP, PGUP, DOWN
- and PGDN keys to scroll between the lines, the program doesn't allow
- scrolling to the sides by hiding all the columns except the current
- column. Trying to unhide the columns MAY destroy the program code.
- For example: if by mistake you have pressed the "/" key press ESC
- to get back to the READY mode and then press F2 to enter EDIT mode
- or just continue to type or press ENTER to exit.
-
- Type the formula [ @cos(var)-var ] and press ENTER to get the next
- menu:
-
- 1st order 2nd order 3rd order Graph Help
-
- The user can have:
- - 1st order differentiation which uses the formula dy/dx=(Y1-Y0)/h,
- and works with unevenly spaced data too
- - 2nd order differentiation which uses the formula
- dy2/dx2=(Y2-2*Y1+Y0)/h^2 and works only with evenly spaced data
- - 3rd order differentiation which uses the formula
- dy3/dx3=(Y3-3*Y2+3*Y1-Y0)/h^3 and works only with evenly spaced
- data
-
- Choosing one of the differentiation order bring the next three
- prompts
-
- Input the lower limit - 0
-
- Input the upper limit - 14
-
- Input the number of steps - 200
-
- For each prompt type the appropriate number and press ENTER. The
- results for the 1st order differentiation and these inputs are:
-
- ____________________________________________________________________________
-
- 1st order 2nd order 3rd order Graph Help
- Uses the formula dy/dx=(Y1-Y0)/h, works with unevenly spaced data
- A B C D E
- 1 ====================================================================
- 2 Units | Output/Input | Memory |
- 3 ====================================================================
- 4 None | 0.00 | 0.00|
- 5 ====================================================================
- EV EW EX EY EZ
- 1 1 0 -1.0349857107 -1.0349857107
- 2 0.9275510003 0.07 -1.104785772 -1.104785772
- 3 0.8502159962 0.14 -1.1740725927 -1.1740725927
- 4 0.7680309147 0.21 -1.2425068059 -1.2425068059
- 5 0.6810554383 0.28 -1.3097532209 -1.3097532209
- 6 0.5893727128 0.35 -1.3754824648 -1.3754824648
- 7 0.4930889403 0.42 -1.4393725957 -1.4393725957
- 8 0.3923328586 0.49 -1.50111068 -1.50111068
- 9 0.287255111 0.56 -1.5603943243 -1.5603943243
- 10 0.1780275083 0.63 -1.6169331575 -1.6169331575
- 11 0.0648421873 0.7 -1.6704502525 -1.6704502525
- 12 -0.0520893304 0.77 -1.7206834824 -1.7206834824
- 13 -0.1725371742 0.84 -1.767386805 -1.767386805
- 14 -0.2962542505 0.91 -1.8103314675 -1.8103314675
- ____________________________________________________________________________
-
-
- Press <G>raph to get the next screen:
-
- ____________________________________________________________________________
-
- Before After Data_save Graph_save Help
- The function before integration [ESC] - Previous menu
- A B C D E
- 1 ====================================================================
- 2 Units | Output/Input | Memory |
- 3 ====================================================================
- 4 None | 0.00 | 0.00|
- 5 ====================================================================
- EV EW EX EY EZ
- 1 1 0 -1.0349857107 -1.0349857107
- 2 0.9275510003 0.07 -1.104785772 -1.104785772
- 3 0.8502159962 0.14 -1.1740725927 -1.1740725927
- 4 0.7680309147 0.21 -1.2425068059 -1.2425068059
- 5 0.6810554383 0.28 -1.3097532209 -1.3097532209
- 6 0.5893727128 0.35 -1.3754824648 -1.3754824648
- 7 0.4930889403 0.42 -1.4393725957 -1.4393725957
- 8 0.3923328586 0.49 -1.50111068 -1.50111068
- 9 0.287255111 0.56 -1.5603943243 -1.5603943243
- 10 0.1780275083 0.63 -1.6169331575 -1.6169331575
- 11 0.0648421873 0.7 -1.6704502525 -1.6704502525
- 12 -0.0520893304 0.77 -1.7206834824 -1.7206834824
- 13 -0.1725371742 0.84 -1.767386805 -1.767386805
- 14 -0.2962542505 0.91 -1.8103314675 -1.8103314675
- ____________________________________________________________________________
-
-
- <B>efore - View the original graph
-
- <A>fter - View the graph after integration
-
- <D>ata_save - Save the data table to a disk a a text (ASCII) file for
- later use
-
- <G>raph_save - Creates a .PIC file of the last displayed graph
-
- The column EV includes the function values Y = @cos(var)-var
- The column EW includes the independent variable (var)
- The column EY includes the differentiated function values.
-
- To see the function before differentiation print the file
- DIFFBEFO.PIC using Lotus PRINTGRAPH. To see the function after
- differentiation print the file DIFFAFT.PIC.
-
-
- <D>ata
-
-
- Using this option the user can integrate a function given as a data
- table. The table should be arranged as two columns of numbers as a
- text (ASCII) file. The 1st column is F(X) and the 2nd column is X.
-
-
-
- Press <D> to see the next prompt:
-
- input file name - ISRA7.PRN
-
- The next screen appears:
-
- 1st order 2nd order 3rd order Graph Help
-
- ____________________________________________________________________________
-
- A B C D E
- 1 ====================================================================
- 2 Units | Output/Input | Memory |
- 3 ====================================================================
- 4 None | 0.00 | 0.00|
- 5 ====================================================================
- EV EW EX EY EZ
- 1 1200 1195
- 2 1201 1195.14
- 3 1201 1195.28
- 4 1201.5 1195.42
- 5 1200 1195.56
- 6 1201 1195.7
- 7 1201 1195.84
- 8 1201.5 1195.98
- 9 1199 1196.12
- 10 1198 1196.26
- 11 1197 1196.4
- 12 1197.5 1196.54
- 13 1200 1196.68
- 14 1201 1196.82
- ____________________________________________________________________________
-
-
- Press <1> to create the next screen:
-
- ____________________________________________________________________________
-
- 1st order 2nd order 3rd order Graph Help
- Uses the formula dy/dx=(Y1-Y0)/h, works with unevenly spaced data
- A B C D E
- 1 ====================================================================
- 2 Units | Output/Input | Memory |
- 3 ====================================================================
- 4 None | 0.00 | 0.00|
- 5 ====================================================================
- EV EW EX EY EZ
- 1 1200 1195 7.1428571429 7.1428571429
- 2 1201 1195.14 0 0
- 3 1201 1195.28 3.5714285714 3.5714285714
- 4 1201.5 1195.42 -10.714285714 -10.714285714
- 5 1200 1195.56 7.1428571429 7.1428571429
- 6 1201 1195.7 0 0
- 7 1201 1195.84 3.5714285714 3.5714285714
- 8 1201.5 1195.98 -17.857142857 -17.857142857
- 9 1199 1196.12 -7.1428571429 -7.1428571429
- 10 1198 1196.26 -7.1428571429 -7.1428571429
- 11 1197 1196.4 3.5714285714 3.5714285714
- 12 1197.5 1196.54 17.857142857 17.857142857
- 13 1200 1196.68 7.1428571429 7.1428571429
- 14 1201 1196.82 0 0
- ____________________________________________________________________________
-
-
- Press <G>raph to get the next menu:
-
- Before After Data_save Graph_save Help
-
- Where:
-
- <B>efore - View the original graph
-
- <A>fter - View the graph after integration
-
- <D>ata_save - Save the data table to a disk as a text (ASCII) file for
- later use
-
- <G>raph_save - Creates a .PIC file of the last displayed graph
-
- The column EV includes the function values Y = @cos(var)-var
- The column EW includes the independent variable (var)
- The column EY includes the integral values.
-
- To see the function before integration print the file DINTBEF.PIC
- using Lotus PRINTGRAPH. To see the function after integration print
- the file DINTAFT.PIC.
-